diff --git a/coordinator/configure.lua b/coordinator/configure.lua
index 54fb854..e763a27 100644
--- a/coordinator/configure.lua
+++ b/coordinator/configure.lua
@@ -1449,9 +1449,11 @@ function configurator.configure(start_code, message)
             elseif event == "paste" then
                 display.handle_paste(param1)
             elseif event == "peripheral_detach" then
+---@diagnostic disable-next-line: discard-returns
                 ppm.handle_unmount(param1)
                 tool_ctl.gen_mon_list()
             elseif event == "peripheral" then
+---@diagnostic disable-next-line: discard-returns
                 ppm.mount(param1)
                 tool_ctl.gen_mon_list()
             elseif event == "monitor_resize" then
diff --git a/coordinator/iocontrol.lua b/coordinator/iocontrol.lua
index 9aa3dbc..bf73e1f 100644
--- a/coordinator/iocontrol.lua
+++ b/coordinator/iocontrol.lua
@@ -228,6 +228,8 @@ function iocontrol.init(conf, comms, temp_scale)
         ---@class ioctl_unit
         local entry = {
             unit_id = i,
+            connected = false,
+            rtu_hw = { boilers = {}, turbines = {} },
 
             num_boilers = 0,
             num_turbines = 0,
@@ -319,12 +321,14 @@ function iocontrol.init(conf, comms, temp_scale)
         for _ = 1, conf.cooling.r_cool[i].BoilerCount do
             table.insert(entry.boiler_ps_tbl, psil.create())
             table.insert(entry.boiler_data_tbl, {})
+            table.insert(entry.rtu_hw.boilers, { connected = false, faulted = false })
         end
 
         -- create turbine tables
         for _ = 1, conf.cooling.r_cool[i].TurbineCount do
             table.insert(entry.turbine_ps_tbl, psil.create())
             table.insert(entry.turbine_data_tbl, {})
+            table.insert(entry.rtu_hw.turbines, { connected = false, faulted = false })
         end
 
         -- create tank tables
@@ -897,6 +901,7 @@ function iocontrol.update_unit_statuses(statuses)
                 end
 
                 if #reactor_status == 0 then
+                    unit.connected = false
                     unit.unit_ps.publish("computed_status", 1)   -- disconnected
                 elseif #reactor_status == 3 then
                     local mek_status = reactor_status[1]
@@ -956,6 +961,8 @@ function iocontrol.update_unit_statuses(statuses)
                             unit.unit_ps.publish(key, val)
                         end
                     end
+
+                    unit.connected = true
                 else
                     log.debug(log_header .. "reactor status length mismatch")
                     valid = false
@@ -970,7 +977,10 @@ function iocontrol.update_unit_statuses(statuses)
                         local boil_sum = 0
 
                         for id = 1, #unit.boiler_ps_tbl do
-                            if rtu_statuses.boilers[id] == nil then
+                            local connected = rtu_statuses.boilers[id] ~= nil
+                            unit.rtu_hw.boilers[id].connected = connected
+
+                            if not connected then
                                 -- disconnected
                                 unit.boiler_ps_tbl[id].publish("computed_status", 1)
                             end
@@ -982,6 +992,7 @@ function iocontrol.update_unit_statuses(statuses)
                                 local ps   = unit.boiler_ps_tbl[id]   ---@type psil
 
                                 local rtu_faulted = _record_multiblock_status(boiler, data, ps)
+                                unit.rtu_hw.boilers[id].faulted = rtu_faulted
 
                                 if rtu_faulted then
                                     ps.publish("computed_status", 3)        -- faulted
@@ -1013,7 +1024,10 @@ function iocontrol.update_unit_statuses(statuses)
                         local flow_sum = 0
 
                         for id = 1, #unit.turbine_ps_tbl do
-                            if rtu_statuses.turbines[id] == nil then
+                            local connected = rtu_statuses.turbines[id] ~= nil
+                            unit.rtu_hw.turbines[id].connected = connected
+
+                            if not connected then
                                 -- disconnected
                                 unit.turbine_ps_tbl[id].publish("computed_status", 1)
                             end
@@ -1025,6 +1039,7 @@ function iocontrol.update_unit_statuses(statuses)
                                 local ps   = unit.turbine_ps_tbl[id]   ---@type psil
 
                                 local rtu_faulted = _record_multiblock_status(turbine, data, ps)
+                                unit.rtu_hw.turbines[id].faulted = rtu_faulted
 
                                 if rtu_faulted then
                                     ps.publish("computed_status", 3)        -- faulted
diff --git a/coordinator/session/pocket.lua b/coordinator/session/pocket.lua
index 7101297..09ec15c 100644
--- a/coordinator/session/pocket.lua
+++ b/coordinator/session/pocket.lua
@@ -138,21 +138,26 @@ function pocket.new_session(id, s_addr, in_queue, out_queue, timeout)
                 }
 
                 _send(CRDN_TYPE.API_GET_FAC, data)
-            elseif pkt.type == CRDN_TYPE.API_GET_UNITS then
-                local data = {}
+            elseif pkt.type == CRDN_TYPE.API_GET_UNIT then
+                if pkt.length == 1 and type(pkt.data[1]) == "number" then
+                    local u = db.units[pkt.data[1]]   ---@type ioctl_unit
 
-                for i = 1, #db.units do
-                    local u = db.units[i]   ---@type ioctl_unit
-                    table.insert(data, {
-                        u.unit_id,
-                        u.num_boilers,
-                        u.num_turbines,
-                        u.num_snas,
-                        u.has_tank
-                    })
+                    if u then
+                        local data = {
+                            u.unit_id,
+                            u.connected,
+                            u.rtu_hw,
+                            u.alarms,
+                            u.annunciator,
+                            u.reactor_data,
+                            u.boiler_data_tbl,
+                            u.turbine_data_tbl,
+                            u.tank_data_tbl
+                        }
+
+                        _send(CRDN_TYPE.API_GET_UNIT, data)
+                    end
                 end
-
-                _send(CRDN_TYPE.API_GET_UNITS, data)
             else
                 log.debug(log_header .. "handler received unsupported CRDN packet type " .. pkt.type)
             end
diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index f4de35d..0b8a06c 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -19,7 +19,7 @@ local renderer    = require("coordinator.renderer")
 local sounder     = require("coordinator.sounder")
 local threads     = require("coordinator.threads")
 
-local COORDINATOR_VERSION = "v1.4.5"
+local COORDINATOR_VERSION = "v1.4.6"
 
 local CHUNK_LOAD_DELAY_S = 30.0
 
diff --git a/coordinator/ui/components/unit_detail.lua b/coordinator/ui/components/unit_detail.lua
index fe36a85..2c26b98 100644
--- a/coordinator/ui/components/unit_detail.lua
+++ b/coordinator/ui/components/unit_detail.lua
@@ -183,7 +183,7 @@ local function init(parent, id)
     local rad_wrn = IndicatorLight{parent=annunciator,label="Radiation Warning",colors=ind_yel}
     local r_rtrip = IndicatorLight{parent=annunciator,label="RCP Trip",colors=ind_red}
     local r_cflow = IndicatorLight{parent=annunciator,label="RCS Flow Low",colors=ind_yel}
-    local r_clow  = IndicatorLight{parent=annunciator,label="Coolant  Level Low",colors=ind_yel}
+    local r_clow  = IndicatorLight{parent=annunciator,label="Coolant Level Low",colors=ind_yel}
     local r_temp  = IndicatorLight{parent=annunciator,label="Reactor Temp. High",colors=ind_red}
     local r_rhdt  = IndicatorLight{parent=annunciator,label="Reactor High Delta T",colors=ind_yel}
     local r_firl  = IndicatorLight{parent=annunciator,label="Fuel Input Rate Low",colors=ind_yel}
diff --git a/graphics/core.lua b/graphics/core.lua
index b4e1d94..830ca69 100644
--- a/graphics/core.lua
+++ b/graphics/core.lua
@@ -7,7 +7,7 @@ local flasher = require("graphics.flasher")
 
 local core = {}
 
-core.version = "2.2.3"
+core.version = "2.2.4"
 
 core.flasher = flasher
 core.events = events
diff --git a/graphics/element.lua b/graphics/element.lua
index c7cc056..731a22c 100644
--- a/graphics/element.lua
+++ b/graphics/element.lua
@@ -198,6 +198,9 @@ function element.new(args, child_offset_x, child_offset_y)
     ---@param offset_y integer y offset for mouse events
     ---@param next_y integer next line if no y was provided
     function protected.prepare_template(offset_x, offset_y, next_y)
+        -- don't auto incrememnt y if inheriting height, that would cause an assertion
+        next_y = util.trinary(args.height == nil, 1, next_y)
+
         -- record offsets in case there is a reposition
         self.offset_x = offset_x
         self.offset_y = offset_y
diff --git a/graphics/elements/controls/app.lua b/graphics/elements/controls/app.lua
index f610393..4ac936d 100644
--- a/graphics/elements/controls/app.lua
+++ b/graphics/elements/controls/app.lua
@@ -30,7 +30,7 @@ local function app_button(args)
     element.assert(type(args.app_fg_bg) == "table", "app_fg_bg is a required field")
 
     args.height = 4
-    args.width = 5
+    args.width = 7
 
     -- create new graphics element base object
     local e = element.new(args)
@@ -46,7 +46,7 @@ local function app_button(args)
         end
 
         -- draw icon
-        e.w_set_cur(1, 1)
+        e.w_set_cur(2, 1)
         e.w_set_fgd(fgd)
         e.w_set_bkg(bkg)
         e.w_write("\x9f\x83\x83\x83")
@@ -55,16 +55,16 @@ local function app_button(args)
         e.w_write("\x90")
         e.w_set_fgd(fgd)
         e.w_set_bkg(bkg)
-        e.w_set_cur(1, 2)
+        e.w_set_cur(2, 2)
         e.w_write("\x95   ")
         e.w_set_fgd(bkg)
         e.w_set_bkg(fgd)
         e.w_write("\x95")
-        e.w_set_cur(1, 3)
+        e.w_set_cur(2, 3)
         e.w_write("\x82\x8f\x8f\x8f\x81")
 
         -- write the icon text
-        e.w_set_cur(3, 2)
+        e.w_set_cur(4, 2)
         e.w_set_fgd(fgd)
         e.w_set_bkg(bkg)
         e.w_write(args.text)
diff --git a/graphics/elements/controls/sidebar.lua b/graphics/elements/controls/sidebar.lua
index fef8a8a..58e8b13 100644
--- a/graphics/elements/controls/sidebar.lua
+++ b/graphics/elements/controls/sidebar.lua
@@ -8,13 +8,7 @@ local element = require("graphics.element")
 
 local MOUSE_CLICK = core.events.MOUSE_CLICK
 
----@class sidebar_tab
----@field char string character identifier
----@field color cpair tab colors (fg/bg)
-
 ---@class sidebar_args
----@field tabs table sidebar tab options
----@field callback function function to call on tab change
 ---@field parent graphics_element
 ---@field id? string element id
 ---@field x? integer 1 if omitted
@@ -27,21 +21,16 @@ local MOUSE_CLICK = core.events.MOUSE_CLICK
 ---@param args sidebar_args
 ---@return graphics_element element, element_id id
 local function sidebar(args)
-    element.assert(type(args.tabs) == "table", "tabs is a required field")
-    element.assert(#args.tabs > 0, "at least one tab is required")
-    element.assert(type(args.callback) == "function", "callback is a required field")
-
     args.width = 3
 
     -- create new graphics element base object
     local e = element.new(args)
 
-    element.assert(e.frame.h >= (#args.tabs * 3), "height insufficent to display all tabs")
-
     -- default to 1st tab
     e.value = 1
 
     local was_pressed = false
+    local tabs = {}
 
     -- show the button state
     ---@param pressed? boolean if the currently selected tab should appear as actively pressed
@@ -51,10 +40,18 @@ local function sidebar(args)
         was_pressed = pressed
         pressed_idx = pressed_idx or e.value
 
-        for i = 1, #args.tabs do
-            local tab = args.tabs[i] ---@type sidebar_tab
+        -- clear
+        e.w_set_fgd(e.fg_bg.fgd)
+        e.w_set_bkg(e.fg_bg.bkg)
+        for y = 1, e.frame.h do
+            e.w_set_cur(1, y)
+            e.w_write("   ")
+        end
 
-            local y = ((i - 1) * 3) + 1
+        -- draw tabs
+        for i = 1, #tabs do
+            local tab = tabs[i] ---@type sidebar_tab
+            local y = tab.y_start
 
             e.w_set_cur(1, y)
 
@@ -66,13 +63,29 @@ local function sidebar(args)
                 e.w_set_bkg(tab.color.bkg)
             end
 
-            e.w_write("   ")
-            e.w_set_cur(1, y + 1)
-            if e.value == i then
-                e.w_write(" " .. tab.char .. "\x10")
-            else e.w_write(" " .. tab.char .. " ") end
-            e.w_set_cur(1, y + 2)
-            e.w_write("   ")
+            if tab.tall then
+                e.w_write("   ")
+                e.w_set_cur(1, y + 1)
+            end
+
+            e.w_write(tab.label)
+
+            if tab.tall then
+                e.w_set_cur(1, y + 2)
+                e.w_write("   ")
+            end
+        end
+    end
+
+    -- determine which tab was pressed
+    ---@param y integer y coordinate
+    local function find_tab(y)
+        for i = 1, #tabs do
+            local tab = tabs[i] ---@type sidebar_tab
+
+            if y >= tab.y_start and y <= tab.y_end then
+                return i
+            end
         end
     end
 
@@ -81,23 +94,25 @@ local function sidebar(args)
     function e.handle_mouse(event)
         -- determine what was pressed
         if e.enabled then
-            local cur_idx = math.ceil(event.current.y / 3)
-            local ini_idx = math.ceil(event.initial.y / 3)
+            local cur_idx = find_tab(event.current.y)
+            local ini_idx = find_tab(event.initial.y)
+            local tab = tabs[cur_idx]
 
-            if args.tabs[cur_idx] ~= nil then
+            -- handle press if a callback was provided
+            if tab ~= nil and type(tab.callback) == "function" then
                 if event.type == MOUSE_CLICK.TAP then
                     e.value = cur_idx
                     draw(true)
                     -- show as unpressed in 0.25 seconds
                     tcd.dispatch(0.25, function () draw(false) end)
-                    args.callback(e.value)
+                    tab.callback()
                 elseif event.type == MOUSE_CLICK.DOWN then
                     draw(true, cur_idx)
                 elseif event.type == MOUSE_CLICK.UP then
                     if cur_idx == ini_idx and e.in_frame_bounds(event.current.x, event.current.y) then
                         e.value = cur_idx
                         draw(false)
-                        args.callback(e.value)
+                        tab.callback()
                     else draw(false) end
                 end
             elseif event.type == MOUSE_CLICK.UP then
@@ -113,6 +128,35 @@ local function sidebar(args)
         draw(false)
     end
 
+    -- update the sidebar navigation options
+    ---@param items table sidebar entries
+    function e.on_update(items)
+        local next_y = 1
+
+        tabs = {}
+
+        for i = 1, #items do
+            local item = items[i]
+            local height = util.trinary(item.tall, 3, 1)
+
+            ---@class sidebar_tab
+            local entry = {
+                y_start = next_y,            ---@type integer
+                y_end = next_y + height - 1, ---@type integer
+                tall = item.tall,            ---@type boolean
+                label = item.label,          ---@type string
+                color = item.color,          ---@type cpair
+                callback = item.callback     ---@type function|nil
+            }
+
+            next_y = next_y + height
+
+            tabs[i] = entry
+        end
+
+        draw()
+    end
+
     -- element redraw
     e.redraw = draw
 
diff --git a/graphics/elements/indicators/icon.lua b/graphics/elements/indicators/icon.lua
index 5c2fc4e..15aef3a 100644
--- a/graphics/elements/indicators/icon.lua
+++ b/graphics/elements/indicators/icon.lua
@@ -9,7 +9,7 @@ local element = require("graphics.element")
 ---@class icon_indicator_args
 ---@field label string indicator label
 ---@field states table state color and symbol table
----@field value? integer default state, defaults to 1
+---@field value? integer|boolean default state, defaults to 1 (true = 2, false = 1)
 ---@field min_label_width? integer label length if omitted
 ---@field parent graphics_element
 ---@field id? string element id
@@ -33,6 +33,7 @@ local function icon(args)
     local e = element.new(args)
 
     e.value = args.value or 1
+    if e.value == true then e.value = 2 end
 
     -- state blit strings
     local state_blit_cmds = {}
@@ -47,8 +48,11 @@ local function icon(args)
     end
 
     -- on state change
-    ---@param new_state integer indicator state
+    ---@param new_state integer|boolean indicator state
     function e.on_update(new_state)
+        new_state = new_state or 1
+        if new_state == true then new_state = 2 end
+
         local blit_cmd = state_blit_cmds[new_state]
         e.value = new_state
         e.w_set_cur(1, 1)
@@ -56,7 +60,7 @@ local function icon(args)
     end
 
     -- set indicator state
-    ---@param val integer indicator state
+    ---@param val integer|boolean indicator state
     function e.set_value(val) e.on_update(val) end
 
     -- element redraw
diff --git a/pocket/iocontrol.lua b/pocket/iocontrol.lua
index 30f4879..f6cbadb 100644
--- a/pocket/iocontrol.lua
+++ b/pocket/iocontrol.lua
@@ -5,8 +5,10 @@
 local log   = require("scada-common.log")
 local psil  = require("scada-common.psil")
 local types = require("scada-common.types")
+local util  = require("scada-common.util")
 
 local ALARM = types.ALARM
+local ALARM_STATE = types.ALARM_STATE
 
 ---@todo nominal trip time is ping (0ms to 10ms usually)
 local WARN_TT = 40
@@ -72,6 +74,10 @@ function iocontrol.alloc_nav()
         self.pane = root_pane
     end
 
+    function io.nav.set_sidebar(sidebar)
+        self.sidebar = sidebar
+    end
+
     -- register an app
     ---@param app_id POCKET_APP_ID app ID
     ---@param container graphics_element element that contains this app (usually a Div)
@@ -79,18 +85,36 @@ function iocontrol.alloc_nav()
     function io.nav.register_app(app_id, container, pane)
         ---@class pocket_app
         local app = {
-            root = { _p = nil, _c = {}, nav_to = function () end, tasks = {} }, ---@type nav_tree_page
+            loaded = false,
+            load = nil,
             cur_page = nil, ---@type nav_tree_page
             pane = pane,
-            paned_pages = {}
+            paned_pages = {},
+            sidebar_items = {}
         }
 
+        app.load = function () app.loaded = true end
+
         -- delayed set of the pane if it wasn't ready at the start
         ---@param root_pane graphics_element multipane
         function app.set_root_pane(root_pane)
             app.pane = root_pane
         end
 
+        function app.set_sidebar(items)
+            app.sidebar_items = items
+            if self.sidebar then self.sidebar.update(items) end
+        end
+
+        -- function to run on initial load into memory
+        ---@param on_load function callback
+        function app.set_on_load(on_load)
+            app.load = function ()
+                on_load()
+                app.loaded = true
+            end
+        end
+
         -- if a pane was provided, this will switch between numbered pages
         ---@param idx integer page index
         function app.switcher(idx)
@@ -107,9 +131,8 @@ function iocontrol.alloc_nav()
             ---@type nav_tree_page
             local page = { _p = parent, _c = {}, nav_to = function () end, switcher = function () end, tasks = {} }
 
-            if parent == nil then
-                app.root = page
-                if app.cur_page == nil then app.cur_page = page end
+            if parent == nil and app.cur_page == nil then
+                app.cur_page = page
             end
 
             if type(nav_to) == "number" then
@@ -160,9 +183,16 @@ function iocontrol.alloc_nav()
     -- open a given app
     ---@param app_id POCKET_APP_ID
     function io.nav.open_app(app_id)
-        if self.apps[app_id] then
+        local app = self.apps[app_id]   ---@type pocket_app
+        if app then
+            if not app.loaded then app.load() end
+
             self.cur_app = app_id
             self.pane.set_value(app_id)
+
+            if #app.sidebar_items > 0 then
+                self.sidebar.update(app.sidebar_items)
+            end
         else
             log.debug("tried to open unknown app")
         end
@@ -227,6 +257,12 @@ function iocontrol.init_core(comms)
         alarm_buttons = {},
         tone_indicators = {}    -- indicators to update from supervisor tone states
     }
+
+    -- API access
+    ---@class pocket_ioctl_api
+    io.api = {
+        get_unit = function (unit) comms.api__get_unit(unit) end
+    }
 end
 
 -- initialize facility-dependent components of pocket iocontrol
@@ -262,6 +298,16 @@ function iocontrol.init_fac(conf, temp_scale)
         auto_ramping = false,
         auto_saturated = false,
 
+        auto_scram = false,
+        ---@type ascram_status
+        ascram_status = {
+            matrix_dc = false,
+            matrix_fill = false,
+            crit_alarm = false,
+            radiation = false,
+            gen_fault = false
+        },
+
         ---@type WASTE_PRODUCT
         auto_current_waste_product = types.WASTE_PRODUCT.PLUTONIUM,
         auto_pu_fallback_active = false,
@@ -282,11 +328,188 @@ function iocontrol.init_fac(conf, temp_scale)
         env_d_ps = psil.create(),
         env_d_data = {}
     }
+
+    -- create induction and SPS tables (currently only 1 of each is supported)
+    table.insert(io.facility.induction_ps_tbl, psil.create())
+    table.insert(io.facility.induction_data_tbl, {})
+    table.insert(io.facility.sps_ps_tbl, psil.create())
+    table.insert(io.facility.sps_data_tbl, {})
+
+    -- determine tank information
+    if io.facility.tank_mode == 0 then
+        io.facility.tank_defs = {}
+        -- on facility tank mode 0, setup tank defs to match unit tank option
+        for i = 1, conf.num_units do
+            io.facility.tank_defs[i] = util.trinary(conf.cooling.r_cool[i].TankConnection, 1, 0)
+        end
+
+        io.facility.tank_list = { table.unpack(io.facility.tank_defs) }
+    else
+        -- decode the layout of tanks from the connections definitions
+        local tank_mode = io.facility.tank_mode
+        local tank_defs = io.facility.tank_defs
+        local tank_list = { table.unpack(tank_defs) }
+
+        local function calc_fdef(start_idx, end_idx)
+            local first = 4
+            for i = start_idx, end_idx do
+                if io.facility.tank_defs[i] == 2 then
+                    if i < first then first = i end
+                end
+            end
+            return first
+        end
+
+        if tank_mode == 1 then
+            -- (1) 1 total facility tank (A A A A)
+            local first_fdef = calc_fdef(1, #tank_defs)
+            for i = 1, #tank_defs do
+                if i > first_fdef and tank_defs[i] == 2 then
+                    tank_list[i] = 0
+                end
+            end
+        elseif tank_mode == 2 then
+            -- (2) 2 total facility tanks (A A A B)
+            local first_fdef = calc_fdef(1, math.min(3, #tank_defs))
+            for i = 1, #tank_defs do
+                if (i ~= 4) and (i > first_fdef) and (tank_defs[i] == 2) then
+                    tank_list[i] = 0
+                end
+            end
+        elseif tank_mode == 3 then
+            -- (3) 2 total facility tanks (A A B B)
+            for _, a in pairs({ 1, 3 }) do
+                local b = a + 1
+                if (tank_defs[a] == 2) and (tank_defs[b] == 2) then
+                    tank_list[b] = 0
+                end
+            end
+        elseif tank_mode == 4 then
+            -- (4) 2 total facility tanks (A B B B)
+            local first_fdef = calc_fdef(2, #tank_defs)
+            for i = 1, #tank_defs do
+                if (i ~= 1) and (i > first_fdef) and (tank_defs[i] == 2) then
+                    tank_list[i] = 0
+                end
+            end
+        elseif tank_mode == 5 then
+            -- (5) 3 total facility tanks (A A B C)
+            local first_fdef = calc_fdef(1, math.min(2, #tank_defs))
+            for i = 1, #tank_defs do
+                if (not (i == 3 or i == 4)) and (i > first_fdef) and (tank_defs[i] == 2) then
+                    tank_list[i] = 0
+                end
+            end
+        elseif tank_mode == 6 then
+            -- (6) 3 total facility tanks (A B B C)
+            local first_fdef = calc_fdef(2, math.min(3, #tank_defs))
+            for i = 1, #tank_defs do
+                if (not (i == 1 or i == 4)) and (i > first_fdef) and (tank_defs[i] == 2) then
+                    tank_list[i] = 0
+                end
+            end
+        elseif tank_mode == 7 then
+            -- (7) 3 total facility tanks (A B C C)
+            local first_fdef = calc_fdef(3, #tank_defs)
+            for i = 1, #tank_defs do
+                if (not (i == 1 or i == 2)) and (i > first_fdef) and (tank_defs[i] == 2) then
+                    tank_list[i] = 0
+                end
+            end
+        end
+
+        io.facility.tank_list = tank_list
+    end
+
+    -- create facility tank tables
+    for i = 1, #io.facility.tank_list do
+        if io.facility.tank_list[i] == 2 then
+            table.insert(io.facility.tank_ps_tbl, psil.create())
+            table.insert(io.facility.tank_data_tbl, {})
+        end
+    end
+
+    -- create unit data structures
+    io.units = {}
+    for i = 1, conf.num_units do
+        ---@class pioctl_unit
+        local entry = {
+            unit_id = i,
+            connected = false,
+            rtu_hw = {},
+
+            num_boilers = 0,
+            num_turbines = 0,
+            num_snas = 0,
+            has_tank = conf.cooling.r_cool[i].TankConnection,
+
+            control_state = false,
+            burn_rate_cmd = 0.0,
+            radiation = types.new_zero_radiation_reading(),
+
+            sna_peak_rate = 0.0,
+            sna_max_rate = 0.0,
+            sna_out_rate = 0.0,
+
+            waste_mode = types.WASTE_MODE.MANUAL_PLUTONIUM,
+            waste_product = types.WASTE_PRODUCT.PLUTONIUM,
+
+            -- auto control group
+            a_group = 0,
+
+            ---@type alarms
+            alarms = { ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE, ALARM_STATE.INACTIVE },
+
+            annunciator = {},   ---@type annunciator
+
+            unit_ps = psil.create(),
+            reactor_data = {},  ---@type reactor_db
+
+            boiler_ps_tbl = {},
+            boiler_data_tbl = {},
+
+            turbine_ps_tbl = {},
+            turbine_data_tbl = {},
+
+            tank_ps_tbl = {},
+            tank_data_tbl = {}
+        }
+
+        -- on other facility modes, overwrite unit TANK option with facility tank defs
+        if io.facility.tank_mode ~= 0 then
+            entry.has_tank = conf.cooling.fac_tank_defs[i] > 0
+        end
+
+        -- create boiler tables
+        for _ = 1, conf.cooling.r_cool[i].BoilerCount do
+            table.insert(entry.boiler_ps_tbl, psil.create())
+            table.insert(entry.boiler_data_tbl, {})
+        end
+
+        -- create turbine tables
+        for _ = 1, conf.cooling.r_cool[i].TurbineCount do
+            table.insert(entry.turbine_ps_tbl, psil.create())
+            table.insert(entry.turbine_data_tbl, {})
+        end
+
+        -- create tank tables
+        if io.facility.tank_defs[i] == 1 then
+            table.insert(entry.tank_ps_tbl, psil.create())
+            table.insert(entry.tank_data_tbl, {})
+        end
+
+        entry.num_boilers = #entry.boiler_data_tbl
+        entry.num_turbines = #entry.turbine_data_tbl
+
+        table.insert(io.units, entry)
+    end
 end
 
 -- set network link state
 ---@param state POCKET_LINK_STATE
-function iocontrol.report_link_state(state)
+---@param sv_addr integer? supervisor address if linked
+---@param api_addr integer? coordinator address if linked
+function iocontrol.report_link_state(state, sv_addr, api_addr)
     io.ps.publish("link_state", state)
 
     if state == LINK_STATE.API_LINK_ONLY or state == LINK_STATE.UNLINKED then
@@ -296,6 +519,11 @@ function iocontrol.report_link_state(state)
     if state == LINK_STATE.SV_LINK_ONLY or state == LINK_STATE.UNLINKED then
         io.ps.publish("crd_conn_quality", 0)
     end
+
+    if state == LINK_STATE.LINKED then
+        io.ps.publish("sv_addr", sv_addr)
+        io.ps.publish("api_addr", api_addr)
+    end
 end
 
 -- determine supervisor connection quality (trip time)
@@ -357,6 +585,188 @@ function iocontrol.record_facility_data(data)
     return valid
 end
 
+-- update unit status data from API_GET_UNIT
+---@param data table
+function iocontrol.record_unit_data(data)
+    if type(data[1]) == "number" and io.units[data[1]] then
+        local unit = io.units[data[1]]  ---@type pioctl_unit
+
+        unit.connected = data[2]
+        unit.rtu_hw = data[3]
+        unit.alarms = data[4]
+
+        --#region Annunciator
+
+        unit.annunciator = data[5]
+
+        local rcs_disconn, rcs_warn, rcs_hazard = false, false, false
+
+        for key, val in pairs(unit.annunciator) do
+            if key == "BoilerOnline" or key == "TurbineOnline" then
+                -- split up online arrays
+                local every = true
+                for id = 1, #val do
+                    every = every and val[id]
+                    unit.boiler_ps_tbl[id].publish(key, val[id])
+                end
+
+                if not every then rcs_disconn = true end
+
+                unit.unit_ps.publish("U_" .. key, every)
+            elseif key == "HeatingRateLow" or key == "WaterLevelLow" then
+                -- split up array for all boilers
+                local any = false
+                for id = 1, #val do
+                    any = any or val[id]
+                    unit.boiler_ps_tbl[id].publish(key, val[id])
+                end
+
+                if key == "HeatingRateLow" and any then
+                    rcs_warn = true
+                elseif key == "WaterLevelLow" and any then
+                    rcs_hazard = true
+                end
+
+                unit.unit_ps.publish("U_" .. key, any)
+            elseif key == "SteamDumpOpen" or key == "TurbineOverSpeed" or key == "GeneratorTrip" or key == "TurbineTrip" then
+                -- split up array for all turbines
+                local any = false
+                for id = 1, #val do
+                    any = any or val[id]
+                    unit.turbine_ps_tbl[id].publish(key, val[id])
+                end
+
+                if key == "GeneratorTrip" and any then
+                    rcs_warn = true
+                elseif (key == "TurbineOverSpeed" or key == "TurbineTrip") and any then
+                    rcs_hazard = true
+                end
+
+                unit.unit_ps.publish("U_" .. key, any)
+            else
+                -- non-table fields
+                unit.unit_ps.publish(key, val)
+            end
+        end
+
+        local anc = unit.annunciator
+        rcs_hazard = rcs_hazard or anc.RCPTrip
+        rcs_warn = rcs_warn or anc.RCSFlowLow or anc.CoolantLevelLow or anc.RCSFault or anc.MaxWaterReturnFeed or
+                   anc.CoolantFeedMismatch or anc.BoilRateMismatch or anc.SteamFeedMismatch or anc.MaxWaterReturnFeed
+
+        local rcs_status = 4
+        if rcs_hazard then
+            rcs_status = 2
+        elseif rcs_warn then
+            rcs_status = 3
+        elseif rcs_disconn then
+            rcs_status = 1
+        end
+
+        unit.unit_ps.publish("U_RCS", rcs_status)
+
+        --#endregion
+
+        --#region Reactor Data
+
+        unit.reactor_data = data[6]
+
+        local control_status = 1
+        local reactor_status = 1
+        local rps_status = 1
+
+        if unit.connected then
+            -- update RPS status
+            if unit.reactor_data.rps_tripped then
+                control_status = 2
+                rps_status = util.trinary(unit.reactor_data.rps_trip_cause == "manual", 3, 2)
+            else rps_status = 4 end
+
+            -- update reactor/control status
+            if unit.reactor_data.mek_status.status then
+                reactor_status = 4
+                control_status = util.trinary(unit.annunciator.AutoControl, 4, 3)
+            else
+                if unit.reactor_data.no_reactor then
+                    reactor_status = 2
+                elseif not unit.reactor_data.formed or unit.reactor_data.rps_status.force_dis then
+                    reactor_status = 3
+                else
+                    reactor_status = 4
+                end
+            end
+
+            for key, val in pairs(unit.reactor_data) do
+                if key ~= "rps_status" and key ~= "mek_struct" and key ~= "mek_status" then
+                    unit.unit_ps.publish(key, val)
+                end
+            end
+
+            if type(unit.reactor_data.rps_status) == "table" then
+                for key, val in pairs(unit.reactor_data.rps_status) do
+                    unit.unit_ps.publish(key, val)
+                end
+            end
+
+            if type(unit.reactor_data.mek_status) == "table" then
+                for key, val in pairs(unit.reactor_data.mek_status) do
+                    unit.unit_ps.publish(key, val)
+                end
+            end
+        end
+
+        unit.unit_ps.publish("U_ControlStatus", control_status)
+        unit.unit_ps.publish("U_ReactorStatus", reactor_status)
+        unit.unit_ps.publish("U_RPS", rps_status)
+
+        --#endregion
+
+        unit.boiler_data_tbl = data[7]
+
+        for id = 1, #unit.boiler_data_tbl do
+            local boiler = unit.boiler_data_tbl[id] ---@type boilerv_session_db
+            local ps     = unit.boiler_ps_tbl[id]   ---@type psil
+
+            local boiler_status = 1
+
+            if unit.rtu_hw.boilers[id].connected then
+                if unit.rtu_hw.boilers[id].faulted then
+                    boiler_status = 3
+                elseif boiler.formed then
+                    boiler_status = 4
+                else
+                    boiler_status = 2
+                end
+            end
+
+            ps.publish("BoilerStatus", boiler_status)
+        end
+
+        unit.turbine_data_tbl = data[8]
+
+        for id = 1, #unit.turbine_data_tbl do
+            local turbine = unit.turbine_data_tbl[id] ---@type turbinev_session_db
+            local ps      = unit.turbine_ps_tbl[id]   ---@type psil
+
+            local turbine_status = 1
+
+            if unit.rtu_hw.turbines[id].connected then
+                if unit.rtu_hw.turbines[id].faulted then
+                    turbine_status = 3
+                elseif turbine.formed then
+                    turbine_status = 4
+                else
+                    turbine_status = 2
+                end
+            end
+
+            ps.publish("TurbineStatus", turbine_status)
+        end
+
+        unit.tank_data_tbl = data[9]
+    end
+end
+
 -- get the IO controller database
 function iocontrol.get_db() return io end
 
diff --git a/pocket/pocket.lua b/pocket/pocket.lua
index 63149e8..0482386 100644
--- a/pocket/pocket.lua
+++ b/pocket/pocket.lua
@@ -119,6 +119,20 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
         self.api.seq_num = self.api.seq_num + 1
     end
 
+    -- send an API packet to the coordinator
+    ---@param msg_type CRDN_TYPE
+    ---@param msg table
+    local function _send_api(msg_type, msg)
+        local s_pkt = comms.scada_packet()
+        local pkt = comms.crdn_packet()
+
+        pkt.make(msg_type, msg)
+        s_pkt.make(self.api.addr, self.api.seq_num, PROTOCOL.SCADA_CRDN, pkt.raw_sendable())
+
+        nic.transmit(config.CRD_Channel, config.PKT_Channel, s_pkt)
+        self.api.seq_num = self.api.seq_num + 1
+    end
+
     -- attempt supervisor connection establishment
     local function _send_sv_establish()
         _send_sv(MGMT_TYPE.ESTABLISH, { comms.version, version, DEVICE_TYPE.PKT })
@@ -192,7 +206,7 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
             end
         else
             -- linked, all good!
-            iocontrol.report_link_state(LINK_STATE.LINKED)
+            iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
         end
     end
 
@@ -215,6 +229,11 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
         if self.sv.linked then _send_sv(MGMT_TYPE.DIAG_ALARM_SET, { id, state }) end
     end
 
+    -- coordinator get unit data
+    function public.api__get_unit(unit)
+        if self.api.linked then _send_api(CRDN_TYPE.API_GET_UNIT, { unit }) end
+    end
+
     -- parse a packet
     ---@param side string
     ---@param sender integer
@@ -304,7 +323,10 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
                             if _check_length(packet, 11) then
                                 iocontrol.record_facility_data(packet.data)
                             end
-                        elseif packet.type == CRDN_TYPE.API_GET_UNITS then
+                        elseif packet.type == CRDN_TYPE.API_GET_UNIT then
+                            if _check_length(packet, 9) then
+                                iocontrol.record_unit_data(packet.data)
+                            end
                         else _fail_type(packet) end
                     else
                         log.debug("discarding coordinator SCADA_CRDN packet before linked")
@@ -358,7 +380,7 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
                                         self.api.addr = src_addr
 
                                         if self.sv.linked then
-                                            iocontrol.report_link_state(LINK_STATE.LINKED)
+                                            iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
                                         else
                                             iocontrol.report_link_state(LINK_STATE.API_LINK_ONLY)
                                         end
@@ -497,7 +519,7 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog)
                                 self.sv.addr = src_addr
 
                                 if self.api.linked then
-                                    iocontrol.report_link_state(LINK_STATE.LINKED)
+                                    iocontrol.report_link_state(LINK_STATE.LINKED, self.sv.addr, self.api.addr)
                                 else
                                     iocontrol.report_link_state(LINK_STATE.SV_LINK_ONLY)
                                 end
diff --git a/pocket/startup.lua b/pocket/startup.lua
index 67e2f79..34cc9f7 100644
--- a/pocket/startup.lua
+++ b/pocket/startup.lua
@@ -18,7 +18,7 @@ local iocontrol = require("pocket.iocontrol")
 local pocket    = require("pocket.pocket")
 local renderer  = require("pocket.renderer")
 
-local POCKET_VERSION = "v0.8.0-alpha"
+local POCKET_VERSION = "v0.9.0-alpha"
 
 local println = util.println
 local println_ts = util.println_ts
diff --git a/pocket/ui/apps/dummy_app.lua b/pocket/ui/apps/dummy_app.lua
index fe21db3..d7845a7 100644
--- a/pocket/ui/apps/dummy_app.lua
+++ b/pocket/ui/apps/dummy_app.lua
@@ -19,6 +19,8 @@ local function create_pages(root)
     db.nav.register_app(iocontrol.APP_ID.DUMMY, main).new_page(nil, function () end)
 
     TextBox{parent=main,text="This app is not implemented yet.",x=1,y=2,alignment=core.ALIGN.CENTER}
+
+    TextBox{parent=main,text=" pretend something  cool is here \x03",x=1,y=10,alignment=core.ALIGN.CENTER,fg_bg=core.cpair(colors.gray,colors.black)}
 end
 
 return create_pages
diff --git a/pocket/ui/apps/sys_apps.lua b/pocket/ui/apps/sys_apps.lua
index a48f85f..aa20a8d 100644
--- a/pocket/ui/apps/sys_apps.lua
+++ b/pocket/ui/apps/sys_apps.lua
@@ -3,10 +3,12 @@
 --
 
 local comms      = require("scada-common.comms")
-local lockbox    = require("lockbox")
 local util       = require("scada-common.util")
 
+local lockbox    = require("lockbox")
+
 local iocontrol  = require("pocket.iocontrol")
+local pocket     = require("pocket.pocket")
 
 local core       = require("graphics.core")
 
@@ -35,8 +37,9 @@ local function create_pages(root)
     local about_app = db.nav.register_app(iocontrol.APP_ID.ABOUT, about_root)
 
     local about_page = about_app.new_page(nil, 1)
-    local fw_page = about_app.new_page(about_page, 2)
-    local hw_page = about_app.new_page(about_page, 3)
+    local nt_page = about_app.new_page(about_page, 2)
+    local fw_page = about_app.new_page(about_page, 3)
+    local hw_page = about_app.new_page(about_page, 4)
 
     local about = Div{parent=about_root,x=1,y=2}
 
@@ -46,8 +49,42 @@ local function create_pages(root)
     local btn_active = cpair(colors.white, colors.black)
     local label = cpair(colors.lightGray, colors.black)
 
-    PushButton{parent=about,x=2,y=3,text="Firmware            >",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=fw_page.nav_to}
-    PushButton{parent=about,x=2,y=4,text="Host Details        >",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=hw_page.nav_to}
+    PushButton{parent=about,x=2,y=3,text="Network             >",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=nt_page.nav_to}
+    PushButton{parent=about,x=2,y=4,text="Firmware            >",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=fw_page.nav_to}
+    PushButton{parent=about,x=2,y=5,text="Host Details        >",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=hw_page.nav_to}
+
+    --#region Network Details
+
+    local config = pocket.config
+
+    local nt_div = Div{parent=about_root,x=1,y=2}
+    TextBox{parent=nt_div,y=1,text="Network Details",height=1,alignment=ALIGN.CENTER}
+
+    PushButton{parent=nt_div,x=2,y=1,text="<",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=about_page.nav_to}
+
+    TextBox{parent=nt_div,x=2,y=3,text="Pocket Address",height=1,alignment=ALIGN.LEFT,fg_bg=label}
+---@diagnostic disable-next-line: undefined-field
+    TextBox{parent=nt_div,x=2,text=util.c(os.getComputerID(),":",config.PKT_Channel),height=1,alignment=ALIGN.LEFT}
+
+    nt_div.line_break()
+    TextBox{parent=nt_div,x=2,text="Supervisor Address",height=1,alignment=ALIGN.LEFT,fg_bg=label}
+    local sv = TextBox{parent=nt_div,x=2,text="",height=1,alignment=ALIGN.LEFT}
+
+    nt_div.line_break()
+    TextBox{parent=nt_div,x=2,text="Coordinator Address",height=1,alignment=ALIGN.LEFT,fg_bg=label}
+    local coord = TextBox{parent=nt_div,x=2,text="",height=1,alignment=ALIGN.LEFT}
+
+    sv.register(db.ps, "sv_addr", function (addr) sv.set_value(util.c(addr, ":", config.SVR_Channel)) end)
+    coord.register(db.ps, "api_addr", function (addr) coord.set_value(util.c(addr, ":", config.CRD_Channel)) end)
+
+    nt_div.line_break()
+    TextBox{parent=nt_div,x=2,text="Message Authentication",height=1,alignment=ALIGN.LEFT,fg_bg=label}
+    local auth = util.trinary(type(config.AuthKey) == "string" and string.len(config.AuthKey) > 0, "HMAC-MD5", "None")
+    TextBox{parent=nt_div,x=2,text=auth,height=1,alignment=ALIGN.LEFT}
+
+    --#endregion
+
+    --#region Firmware Versions
 
     local fw_div = Div{parent=about_root,x=1,y=2}
     TextBox{parent=fw_div,y=1,text="Firmware Versions",height=1,alignment=ALIGN.CENTER}
@@ -81,6 +118,10 @@ local function create_pages(root)
     TextBox{parent=fw_list,x=2,text="Lockbox Version",height=1,alignment=ALIGN.LEFT,fg_bg=label}
     TextBox{parent=fw_list,x=2,text=lockbox.version,height=1,alignment=ALIGN.LEFT}
 
+    --#endregion
+
+    --#region Host Versions
+
     local hw_div = Div{parent=about_root,x=1,y=2}
     TextBox{parent=hw_div,y=1,text="Host Versions",height=1,alignment=ALIGN.CENTER}
 
@@ -94,7 +135,9 @@ local function create_pages(root)
     TextBox{parent=hw_div,x=2,text="Environment",height=1,alignment=ALIGN.LEFT,fg_bg=label}
     TextBox{parent=hw_div,x=2,text=_HOST,height=6,alignment=ALIGN.LEFT}
 
-    local root_pane = MultiPane{parent=about_root,x=1,y=1,panes={about,fw_div,hw_div}}
+    --#endregion
+
+    local root_pane = MultiPane{parent=about_root,x=1,y=1,panes={about,nt_div,fw_div,hw_div}}
 
     about_app.set_root_pane(root_pane)
 end
diff --git a/pocket/ui/main.lua b/pocket/ui/main.lua
index 02e33fd..87960f2 100644
--- a/pocket/ui/main.lua
+++ b/pocket/ui/main.lua
@@ -38,7 +38,7 @@ local function init(main)
     local db = iocontrol.get_db()
 
     -- window header message
-    TextBox{parent=main,y=1,text="DEV ALPHA APP      S   C   ",alignment=ALIGN.LEFT,height=1,fg_bg=style.header}
+    TextBox{parent=main,y=1,text="WIP ALPHA APP      S   C   ",alignment=ALIGN.LEFT,height=1,fg_bg=style.header}
     local svr_conn = SignalBar{parent=main,y=1,x=22,compact=true,colors_low_med=cpair(colors.red,colors.yellow),disconnect_color=colors.lightGray,fg_bg=cpair(colors.green,colors.gray)}
     local crd_conn = SignalBar{parent=main,y=1,x=26,compact=true,colors_low_med=cpair(colors.red,colors.yellow),disconnect_color=colors.lightGray,fg_bg=cpair(colors.green,colors.gray)}
 
@@ -71,10 +71,6 @@ local function init(main)
 
     local page_div = Div{parent=main_pane,x=4,y=1}
 
-    local sidebar_tabs = {
-        { char = "#", color = cpair(colors.black, colors.green) }
-    }
-
     home_page(page_div)
     unit_page(page_div)
 
@@ -84,13 +80,13 @@ local function init(main)
 
     assert(#db.nav.get_containers() == iocontrol.APP_ID.NUM_APPS, "app IDs were not sequential or some apps weren't registered")
 
-    local page_pane = MultiPane{parent=page_div,x=1,y=1,panes=db.nav.get_containers()}
-    db.nav.set_pane(page_pane)
-
-    Sidebar{parent=main_pane,x=1,y=1,tabs=sidebar_tabs,fg_bg=cpair(colors.white,colors.gray),callback=db.nav.open_app}
+    db.nav.set_pane(MultiPane{parent=page_div,x=1,y=1,panes=db.nav.get_containers()})
+    db.nav.set_sidebar(Sidebar{parent=main_pane,x=1,y=1,height=18,fg_bg=cpair(colors.white,colors.gray)})
 
     PushButton{parent=main_pane,x=1,y=19,text="\x1b",min_width=3,fg_bg=cpair(colors.white,colors.gray),active_fg_bg=cpair(colors.gray,colors.black),callback=db.nav.nav_up}
 
+    db.nav.open_app(iocontrol.APP_ID.ROOT)
+
     --#endregion
 end
 
diff --git a/pocket/ui/pages/home_page.lua b/pocket/ui/pages/home_page.lua
index 0ea7c3f..483a881 100644
--- a/pocket/ui/pages/home_page.lua
+++ b/pocket/ui/pages/home_page.lua
@@ -39,21 +39,26 @@ local function new_view(root)
 
     local function open(id) db.nav.open_app(id) end
 
+    app.set_sidebar({
+        { label = " #\x10", tall = true, color = core.cpair(colors.black, colors.green), callback = function () open(APP_ID.ROOT) end }
+    })
+
     local active_fg_bg = cpair(colors.white,colors.gray)
 
-    App{parent=apps_1,x=3,y=2,text="U",title="Units",callback=function()open(APP_ID.UNITS)end,app_fg_bg=cpair(colors.black,colors.yellow),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=10,y=2,text="\x17",title="PRC",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.purple),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=17,y=2,text="\x15",title="CTL",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.green),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=3,y=7,text="\x08",title="DEV",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.lightGray),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=10,y=7,text="\x7f",title="Waste",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.brown),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=17,y=7,text="\xb6",title="Guide",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.cyan),active_fg_bg=active_fg_bg}
-    App{parent=apps_1,x=3,y=12,text="?",title="About",callback=function()open(APP_ID.ABOUT)end,app_fg_bg=cpair(colors.black,colors.white),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=2,y=2,text="U",title="Units",callback=function()open(APP_ID.UNITS)end,app_fg_bg=cpair(colors.black,colors.yellow),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=9,y=2,text="F",title="Facil",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.orange),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=16,y=2,text="\x15",title="Control",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.green),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=2,y=7,text="\x17",title="Process",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.purple),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=9,y=7,text="\x7f",title="Waste",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.brown),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=16,y=7,text="\x08",title="Devices",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.lightGray),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=2,y=12,text="\xb6",title="Guide",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.cyan),active_fg_bg=active_fg_bg}
+    App{parent=apps_1,x=9,y=12,text="?",title="About",callback=function()open(APP_ID.ABOUT)end,app_fg_bg=cpair(colors.black,colors.white),active_fg_bg=active_fg_bg}
 
     TextBox{parent=apps_2,text="Diagnostic Apps",x=1,y=2,height=1,alignment=ALIGN.CENTER}
 
-    App{parent=apps_2,x=3,y=4,text="\x0f",title="Alarm",callback=function()open(APP_ID.ALARMS)end,app_fg_bg=cpair(colors.black,colors.red),active_fg_bg=active_fg_bg}
-    App{parent=apps_2,x=10,y=4,text="\x1e",title="LoopT",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.cyan),active_fg_bg=active_fg_bg}
-    App{parent=apps_2,x=17,y=4,text="@",title="Comps",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.orange),active_fg_bg=active_fg_bg}
+    App{parent=apps_2,x=2,y=4,text="\x0f",title="Alarm",callback=function()open(APP_ID.ALARMS)end,app_fg_bg=cpair(colors.black,colors.red),active_fg_bg=active_fg_bg}
+    App{parent=apps_2,x=9,y=4,text="\x1e",title="LoopT",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.cyan),active_fg_bg=active_fg_bg}
+    App{parent=apps_2,x=16,y=4,text="@",title="Comps",callback=function()open(APP_ID.DUMMY)end,app_fg_bg=cpair(colors.black,colors.orange),active_fg_bg=active_fg_bg}
 
     return main
 end
diff --git a/pocket/ui/pages/unit_page.lua b/pocket/ui/pages/unit_page.lua
index 273ad27..da123e0 100644
--- a/pocket/ui/pages/unit_page.lua
+++ b/pocket/ui/pages/unit_page.lua
@@ -2,14 +2,56 @@
 -- Unit Overview Page
 --
 
+local util      = require("scada-common.util")
+-- local log       = require("scada-common.log")
+
 local iocontrol = require("pocket.iocontrol")
 
 local core      = require("graphics.core")
 
 local Div       = require("graphics.elements.div")
+local MultiPane = require("graphics.elements.multipane")
 local TextBox   = require("graphics.elements.textbox")
 
+local DataIndicator     = require("graphics.elements.indicators.data")
+local IconIndicator     = require("graphics.elements.indicators.icon")
+-- local RadIndicator      = require("graphics.elements.indicators.rad")
+-- local VerticalBar       = require("graphics.elements.indicators.vbar")
+
+local PushButton        = require("graphics.elements.controls.push_button")
+
 local ALIGN = core.ALIGN
+local cpair = core.cpair
+
+local basic_states = {
+    { color = cpair(colors.black, colors.lightGray), symbol = "\x07" },
+    { color = cpair(colors.black, colors.red), symbol = "-" },
+    { color = cpair(colors.black, colors.yellow), symbol = "\x1e" },
+    { color = cpair(colors.black, colors.green), symbol = "+" }
+}
+
+local mode_states = {
+    { color = cpair(colors.black, colors.lightGray), symbol = "\x07" },
+    { color = cpair(colors.black, colors.red), symbol = "-" },
+    { color = cpair(colors.black, colors.green), symbol = "+" },
+    { color = cpair(colors.black, colors.purple), symbol = "A" }
+}
+
+local emc_ind_s = {
+    { color = cpair(colors.black, colors.gray), symbol = "-" },
+    { color = cpair(colors.black, colors.white), symbol = "\x07" },
+    { color = cpair(colors.black, colors.green), symbol = "+" }
+}
+
+local red_ind_s = {
+    { color = cpair(colors.black, colors.lightGray), symbol = "+" },
+    { color = cpair(colors.black, colors.red), symbol = "-" }
+}
+
+local yel_ind_s = {
+    { color = cpair(colors.black, colors.lightGray), symbol = "+" },
+    { color = cpair(colors.black, colors.yellow), symbol = "-" }
+}
 
 -- new unit page view
 ---@param root graphics_element parent
@@ -19,11 +61,259 @@ local function new_view(root)
     local main = Div{parent=root,x=1,y=1}
 
     local app = db.nav.register_app(iocontrol.APP_ID.UNITS, main)
-    app.new_page(nil, function () end)
 
-    TextBox{parent=main,y=2,text="UNITS",height=1,alignment=ALIGN.CENTER}
+    TextBox{parent=main,y=2,text="Units App",height=1,alignment=ALIGN.CENTER}
 
-    TextBox{parent=main,y=4,text="work in progress",height=1,alignment=ALIGN.CENTER}
+    TextBox{parent=main,y=4,text="Loading...",height=1,alignment=ALIGN.CENTER}
+
+    local btn_fg_bg = cpair(colors.yellow, colors.black)
+    local btn_active = cpair(colors.white, colors.black)
+    -- local label = cpair(colors.lightGray, colors.black)
+
+    local nav_links = {}
+
+    local function set_sidebar(id)
+        -- local unit = db.units[id] ---@type pioctl_unit
+
+        local list = {
+            { label = " # ", tall = true, color = core.cpair(colors.black, colors.green), callback = function () db.nav.open_app(iocontrol.APP_ID.ROOT) end },
+            { label = "U-" .. id, color = core.cpair(colors.black, colors.yellow), callback = function () app.switcher(id) end },
+            { label = " \x13 ", color = core.cpair(colors.black, colors.red), callback = nav_links[id].alarm },
+            { label = "RPS", tall = true, color = core.cpair(colors.black, colors.cyan), callback = nav_links[id].rps },
+            -- { label = " R ", color = core.cpair(colors.black, colors.lightGray), callback = function () end },
+            { label = "RCS", tall = true, color = core.cpair(colors.black, colors.blue), callback = nav_links[id].rcs },
+        }
+
+        -- for i = 1, unit.num_boilers do
+        --     table.insert(list, { label = "B-" .. i, color = core.cpair(colors.black, colors.lightBlue), callback = function () end })
+        -- end
+
+        -- for i = 1, unit.num_turbines do
+        --     table.insert(list, { label = "T-" .. i, color = core.cpair(colors.black, colors.white), callback = function () end })
+        -- end
+
+        app.set_sidebar(list)
+    end
+
+    local function load()
+        local page_div = Div{parent=main,x=2,y=2,width=main.get_width()-2}
+
+        local panes = {}
+
+        local active_unit = 1
+
+        -- create all page divs
+        for _ = 1, db.facility.num_units do
+            local div = Div{parent=page_div}
+            table.insert(panes, div)
+            table.insert(nav_links, {})
+        end
+
+        -- previous unit
+        local function prev(x)
+            active_unit = util.trinary(x == 1, db.facility.num_units, x - 1)
+            app.switcher(active_unit)
+            set_sidebar(active_unit)
+        end
+
+        -- next unit
+        local function next(x)
+            active_unit = util.trinary(x == db.facility.num_units, 1, x + 1)
+            app.switcher(active_unit)
+            set_sidebar(active_unit)
+        end
+
+        for i = 1, db.facility.num_units do
+            local u_div = panes[i] ---@type graphics_element
+            local unit = db.units[i] ---@type pioctl_unit
+            local u_ps = unit.unit_ps
+
+            -- refresh data callback, every 500ms it will re-send the query
+            local last_update = 0
+            local function update()
+                if util.time_ms() - last_update >= 500 then
+                    db.api.get_unit(i)
+                    last_update = util.time_ms()
+                end
+            end
+
+            --#region Main Unit Overview
+
+            local u_page = app.new_page(nil, i)
+            u_page.tasks = { update }
+
+            TextBox{parent=u_div,y=1,text="Reactor Unit #"..i,height=1,alignment=ALIGN.CENTER}
+            PushButton{parent=u_div,x=1,y=1,text="<",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=function()prev(i)end}
+            PushButton{parent=u_div,x=21,y=1,text=">",fg_bg=btn_fg_bg,active_fg_bg=btn_active,callback=function()next(i)end}
+
+            local type = util.trinary(unit.num_boilers > 0, "Sodium Cooled Reactor", "Boiling Water Reactor")
+            TextBox{parent=u_div,y=3,text=type,height=1,alignment=ALIGN.CENTER,fg_bg=cpair(colors.gray,colors.black)}
+
+            local lu_col = cpair(colors.lightGray, colors.lightGray)
+            local text_fg = cpair(colors.white, colors._INHERIT)
+
+            local rate = DataIndicator{parent=u_div,y=5,lu_colors=lu_col,label="Rate",unit="mB/t",format="%10.2f",value=0,commas=true,width=26,fg_bg=text_fg}
+            local temp = DataIndicator{parent=u_div,lu_colors=lu_col,label="Temp",unit="K",format="%10.2f",value=0,commas=true,width=26,fg_bg=text_fg}
+
+            local ctrl = IconIndicator{parent=u_div,x=1,y=8,label="Control State",states=mode_states}
+
+            rate.register(u_ps, "act_burn_rate", rate.update)
+            temp.register(u_ps, "temp", temp.update)
+            ctrl.register(u_ps, "U_ControlStatus", ctrl.update)
+
+            u_div.line_break()
+
+            local rct = IconIndicator{parent=u_div,x=1,label="Fission Reactor",states=basic_states}
+            local rps = IconIndicator{parent=u_div,x=1,label="Protection System",states=basic_states}
+
+            rct.register(u_ps, "U_ReactorStatus", rct.update)
+            rps.register(u_ps, "U_RPS", rps.update)
+
+            u_div.line_break()
+
+            local rcs = IconIndicator{parent=u_div,x=1,label="Coolant System",states=basic_states}
+            rcs.register(u_ps, "U_RCS", rcs.update)
+
+            for b = 1, unit.num_boilers do
+                local blr = IconIndicator{parent=u_div,x=1,label="Boiler "..b,states=basic_states}
+                blr.register(unit.boiler_ps_tbl[b], "BoilerStatus", blr.update)
+            end
+
+            for t = 1, unit.num_turbines do
+                local tbn = IconIndicator{parent=u_div,x=1,label="Turbine "..t,states=basic_states}
+                tbn.register(unit.turbine_ps_tbl[t], "TurbineStatus", tbn.update)
+            end
+
+            --#endregion
+
+            --#region Alarms Tab
+
+            local alm_div = Div{parent=page_div}
+            table.insert(panes, alm_div)
+
+            local alm_page = app.new_page(u_page, #panes)
+            alm_page.tasks = { update }
+
+            nav_links[i].alarm = alm_page.nav_to
+
+            TextBox{parent=alm_div,y=1,text="Unit Alarms",height=1,alignment=ALIGN.CENTER}
+
+            TextBox{parent=alm_div,y=3,text="work in progress",height=1,alignment=ALIGN.CENTER,fg_bg=cpair(colors.gray,colors.black)}
+
+            --#endregion
+
+            --#region RPS Tab
+
+            local rps_div = Div{parent=page_div}
+            table.insert(panes, rps_div)
+
+            local rps_page = app.new_page(u_page, #panes)
+            rps_page.tasks = { update }
+
+            nav_links[i].rps = rps_page.nav_to
+
+            TextBox{parent=rps_div,y=1,text="Protection System",height=1,alignment=ALIGN.CENTER}
+
+            local r_trip = IconIndicator{parent=rps_div,y=3,label="RPS Trip",states=basic_states}
+            r_trip.register(u_ps, "U_RPS", r_trip.update)
+
+            local r_mscrm = IconIndicator{parent=rps_div,y=5,label="Manual SCRAM",states=red_ind_s}
+            local r_ascrm = IconIndicator{parent=rps_div,label="Automatic SCRAM",states=red_ind_s}
+            local rps_tmo = IconIndicator{parent=rps_div,label="Timeout",states=yel_ind_s}
+            local rps_flt = IconIndicator{parent=rps_div,label="PPM Fault",states=yel_ind_s}
+            local rps_sfl = IconIndicator{parent=rps_div,label="Not Formed",states=red_ind_s}
+
+            r_mscrm.register(u_ps, "manual", r_mscrm.update)
+            r_ascrm.register(u_ps, "automatic", r_ascrm.update)
+            rps_tmo.register(u_ps, "timeout", rps_tmo.update)
+            rps_flt.register(u_ps, "fault", rps_flt.update)
+            rps_sfl.register(u_ps, "sys_fail", rps_sfl.update)
+
+            rps_div.line_break()
+            local rps_dmg = IconIndicator{parent=rps_div,label="Reactor Damage Hi",states=red_ind_s}
+            local rps_tmp = IconIndicator{parent=rps_div,label="Temp. Critical",states=red_ind_s}
+            local rps_nof = IconIndicator{parent=rps_div,label="Fuel Level Lo",states=yel_ind_s}
+            local rps_exw = IconIndicator{parent=rps_div,label="Waste Level Hi",states=yel_ind_s}
+            local rps_loc = IconIndicator{parent=rps_div,label="Coolant Lo Lo",states=yel_ind_s}
+            local rps_exh = IconIndicator{parent=rps_div,label="Heated Coolant Hi",states=yel_ind_s}
+
+            rps_dmg.register(u_ps, "high_dmg", rps_dmg.update)
+            rps_tmp.register(u_ps, "high_temp", rps_tmp.update)
+            rps_nof.register(u_ps, "no_fuel", rps_nof.update)
+            rps_exw.register(u_ps, "ex_waste", rps_exw.update)
+            rps_loc.register(u_ps, "low_cool", rps_loc.update)
+            rps_exh.register(u_ps, "ex_hcool", rps_exh.update)
+
+            --#endregion
+
+            --#region RCS Tab
+
+            local rcs_div = Div{parent=page_div}
+            table.insert(panes, rcs_div)
+
+            local rcs_page = app.new_page(u_page, #panes)
+            rcs_page.tasks = { update }
+
+            nav_links[i].rcs = rcs_page.nav_to
+
+            TextBox{parent=rcs_div,y=1,text="Coolant System",height=1,alignment=ALIGN.CENTER}
+
+            local r_rtrip = IconIndicator{parent=rcs_div,y=3,label="RCP Trip",states=red_ind_s}
+            local r_cflow = IconIndicator{parent=rcs_div,label="RCS Flow Lo",states=yel_ind_s}
+            local r_clow  = IconIndicator{parent=rcs_div,label="Coolant Level Lo",states=yel_ind_s}
+
+            r_rtrip.register(u_ps, "RCPTrip", r_rtrip.update)
+            r_cflow.register(u_ps, "RCSFlowLow", r_cflow.update)
+            r_clow.register(u_ps, "CoolantLevelLow", r_clow.update)
+
+            local c_flt  = IconIndicator{parent=rcs_div,label="RCS HW Fault",states=yel_ind_s}
+            local c_emg  = IconIndicator{parent=rcs_div,label="Emergency Coolant",states=emc_ind_s}
+            local c_mwrf = IconIndicator{parent=rcs_div,label="Max Water Return",states=yel_ind_s}
+
+            c_flt.register(u_ps, "RCSFault", c_flt.update)
+            c_emg.register(u_ps, "EmergencyCoolant", c_emg.update)
+            c_mwrf.register(u_ps, "MaxWaterReturnFeed", c_mwrf.update)
+
+            -- rcs_div.line_break()
+            -- TextBox{parent=rcs_div,text="Mismatches",height=1,alignment=ALIGN.CENTER,fg_bg=label}
+            local c_cfm = IconIndicator{parent=rcs_div,label="Coolant Feed",states=yel_ind_s}
+            local c_brm = IconIndicator{parent=rcs_div,label="Boil Rate",states=yel_ind_s}
+            local c_sfm = IconIndicator{parent=rcs_div,label="Steam Feed",states=yel_ind_s}
+
+            c_cfm.register(u_ps, "CoolantFeedMismatch", c_cfm.update)
+            c_brm.register(u_ps, "BoilRateMismatch", c_brm.update)
+            c_sfm.register(u_ps, "SteamFeedMismatch", c_sfm.update)
+
+            rcs_div.line_break()
+            -- TextBox{parent=rcs_div,text="Aggregate Checks",height=1,alignment=ALIGN.CENTER,fg_bg=label}
+
+            if unit.num_boilers > 0 then
+                local wll = IconIndicator{parent=rcs_div,label="Boiler Water Lo",states=red_ind_s}
+                local hrl = IconIndicator{parent=rcs_div,label="Heating Rate Lo",states=yel_ind_s}
+
+                wll.register(u_ps, "U_WaterLevelLow", wll.update)
+                hrl.register(u_ps, "U_HeatingRateLow", hrl.update)
+            end
+
+            local tospd = IconIndicator{parent=rcs_div,label="TRB Over Speed",states=red_ind_s}
+            local gtrip = IconIndicator{parent=rcs_div,label="Generator Trip",states=yel_ind_s}
+            local ttrip = IconIndicator{parent=rcs_div,label="Turbine Trip",states=red_ind_s}
+
+            tospd.register(u_ps, "U_TurbineOverSpeed", tospd.update)
+            gtrip.register(u_ps, "U_GeneratorTrip", gtrip.update)
+            ttrip.register(u_ps, "U_TurbineTrip", ttrip.update)
+
+            --#endregion
+        end
+
+        -- setup multipane
+        local u_pane = MultiPane{parent=page_div,x=1,y=1,panes=panes}
+        app.set_root_pane(u_pane)
+
+        set_sidebar(active_unit)
+    end
+
+    app.set_on_load(load)
 
     return main
 end
diff --git a/rtu/configure.lua b/rtu/configure.lua
index efebdee..9012705 100644
--- a/rtu/configure.lua
+++ b/rtu/configure.lua
@@ -1669,9 +1669,11 @@ function configurator.configure(ask_config)
             elseif event == "paste" then
                 display.handle_paste(param1)
             elseif event == "peripheral_detach" then
+---@diagnostic disable-next-line: discard-returns
                 ppm.handle_unmount(param1)
                 tool_ctl.update_peri_list()
             elseif event == "peripheral" then
+---@diagnostic disable-next-line: discard-returns
                 ppm.mount(param1)
                 tool_ctl.update_peri_list()
             end
diff --git a/rtu/startup.lua b/rtu/startup.lua
index 027549c..ae2e72b 100644
--- a/rtu/startup.lua
+++ b/rtu/startup.lua
@@ -31,7 +31,7 @@ local sna_rtu      = require("rtu.dev.sna_rtu")
 local sps_rtu      = require("rtu.dev.sps_rtu")
 local turbinev_rtu = require("rtu.dev.turbinev_rtu")
 
-local RTU_VERSION = "v1.9.5"
+local RTU_VERSION = "v1.9.6"
 
 local RTU_UNIT_TYPE = types.RTU_UNIT_TYPE
 local RTU_UNIT_HW_STATE = databus.RTU_UNIT_HW_STATE
diff --git a/scada-common/comms.lua b/scada-common/comms.lua
index e107d33..5e364e8 100644
--- a/scada-common/comms.lua
+++ b/scada-common/comms.lua
@@ -18,7 +18,7 @@ local comms = {}
 
 -- protocol/data versions (protocol/data independent changes tracked by util.lua version)
 comms.version = "2.5.1"
-comms.api_version = "0.0.1"
+comms.api_version = "0.0.2"
 
 ---@enum PROTOCOL
 local PROTOCOL = {
@@ -67,7 +67,7 @@ local CRDN_TYPE = {
     UNIT_STATUSES = 5,   -- state of each of the reactor units
     UNIT_CMD = 6,        -- command a reactor unit
     API_GET_FAC = 7,     -- API: get all the facility data
-    API_GET_UNITS = 8    -- API: get all the reactor unit data
+    API_GET_UNIT = 8     -- API: get reactor unit data
 }
 
 ---@enum ESTABLISH_ACK