diff --git a/pocket/iorx.lua b/pocket/iorx.lua
index e503f6f..3ea69c1 100644
--- a/pocket/iorx.lua
+++ b/pocket/iorx.lua
@@ -908,6 +908,10 @@ function iorx.record_network_data(data)
             ps.publish(pfx .. "_fw", entry[3])
             ps.publish(pfx .. "_rtt", entry[4])
 
+            if type == DEV_TYPE.PLC then
+                ps.publish(pfx .. "_unit", entry[5])
+            end
+
             if not comp_record[id] then
                 comp_record[id] = true
 
diff --git a/pocket/ui/apps/comps.lua b/pocket/ui/apps/comps.lua
index 4b68d69..97d63f4 100644
--- a/pocket/ui/apps/comps.lua
+++ b/pocket/ui/apps/comps.lua
@@ -2,6 +2,7 @@
 -- Computer List App
 --
 
+local comms        = require("scada-common.comms")
 local util         = require("scada-common.util")
 
 local iocontrol    = require("pocket.iocontrol")
@@ -21,6 +22,8 @@ local WaitingAnim  = require("graphics.elements.animations.Waiting")
 
 local DataIndicator = require("graphics.elements.indicators.DataIndicator")
 
+local DEV_TYPE = comms.DEVICE_TYPE
+
 local ALIGN  = core.ALIGN
 local cpair  = core.cpair
 local border = core.border
@@ -65,7 +68,7 @@ local function new_view(root)
         local panes = {} ---@type Div[]
 
         -- create all page divs
-        for _ = 1, 3 do
+        for _ = 1, 4 do
             local div = Div{parent=page_div}
             table.insert(panes, div)
         end
@@ -79,43 +82,36 @@ local function new_view(root)
             end
         end
 
-        -- create a new radiation monitor list
-        ---@param parent Container
-        ---@param ps psil
-        local function new_mon_list(parent, ps)
-            local mon_list = ListBox{parent=parent,y=6,scroll_height=100,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
+        -- create indicators for the ID, firmware, and RTT
+        ---@param pfx string
+        ---@param rect Rectangle
+        local function create_common_indicators(pfx, rect)
+            TextBox{parent=rect,text="Computer ID",fg_bg=label_fg_bg}
+            TextBox{parent=rect,text="Firmware",fg_bg=label_fg_bg}
+            TextBox{parent=rect,text="Round-Trip Time",fg_bg=label_fg_bg}
+            local addr = TextBox{parent=rect,x=13,y=2,text="---"}
+            local fw = TextBox{parent=rect,x=13,y=3,text="---"}
+            local rtt = TextBox{parent=rect,x=13,y=3,text="---"}
 
-            local elem_list = {}    ---@type graphics_element[]
+            addr.register(f_ps, pfx .. "_addr", addr.set_value)
+            fw.register(f_ps, pfx .. "_fw", fw.set_value)
 
-            mon_list.register(ps, "radiation_monitors", function (data)
-                local ids = textutils.unserialize(data)
+            rtt.register(f_ps, pfx.. "_rtt", function (value)
+                rtt.set_value(rtt)
 
-                -- delete any disconnected monitors
-                for id, elem in pairs(elem_list) do
-                    if not util.table_contains(ids, id) then
-                        elem.delete()
-                        elem_list[id] = nil
-                    end
-                end
-
-                -- add newly connected monitors
-                for _, id in pairs(ids) do
-                    if not elem_list[id] then
-                        elem_list[id] = Div{parent=mon_list,height=5}
-                        local mon_rect = Rectangle{parent=elem_list[id],height=4,x=2,width=20,border=border(1,colors.gray,true),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
-
-                        TextBox{parent=mon_rect,text="Env. Detector "..id}
-                        local mon_rad = RadIndicator{parent=mon_rect,x=2,label="",format="%13.3f",lu_colors=cpair(colors.gray,colors.gray),width=18}
-                        mon_rad.register(ps, "radiation@" .. id, mon_rad.update)
-                    end
+                if value > HIGH_RTT then
+                    rtt.recolor(colors.red)
+                elseif value > WARN_RTT then
+                    rtt.recolor(colors.yellow)
+                else
+                    rtt.recolor(colors.green)
                 end
             end)
         end
 
         --#region main computer page
 
-        local m_pane = panes[1]
-        local m_div = Div{parent=m_pane,x=2,width=main.get_width()-2}
+        local m_div = Div{parent=panes[1],x=2,width=main.get_width()-2}
 
         local main_page = app.new_page(nil, 1)
         main_page.tasks = { update }
@@ -142,16 +138,9 @@ local function new_view(root)
         local crd_rect = Rectangle{parent=crd_div,height=6,x=2,width=21,border=border(1,colors.gray,true),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
 
         TextBox{parent=crd_rect,text="Coordinator"}
-        local crd_online = TextBox{parent=svr_rect,x=12,y=1,width=7,text="Online",fg_bg=cpair(colors.green,colors._INHERIT)}
-        TextBox{parent=crd_rect,text="Computer ID",fg_bg=label_fg_bg}
-        TextBox{parent=crd_rect,text="Firmware",fg_bg=label_fg_bg}
-        TextBox{parent=crd_rect,text="Round-Trip Time",fg_bg=label_fg_bg}
-        local crd_addr = TextBox{parent=svr_rect,x=13,y=2,text="---"}
-        local crd_fw = TextBox{parent=svr_rect,x=13,y=3,text="---"}
-        local crd_rtt = TextBox{parent=svr_rect,x=13,y=3,text="---"}
+        local crd_online = TextBox{parent=crd_rect,x=12,y=1,width=7,text="Online",fg_bg=cpair(colors.green,colors._INHERIT)}
 
-        crd_addr.register(f_ps, "comp_crd_addr", crd_addr.set_value)
-        crd_fw.register(f_ps, "comp_crd_fw", crd_fw.set_value)
+        create_common_indicators("comp_crd", crd_rect)
 
         crd_online.register(f_ps, "comp_crd_online", function (online)
             if online then
@@ -163,39 +152,95 @@ local function new_view(root)
             end
         end)
 
-        crd_rtt.register(f_ps, "comp_crd_rtt", function (rtt)
-            crd_rtt.set_value(rtt)
+        --#endregion
 
-            if type(rtt) ~= "number" then
-                crd_rtt.recolor(label_fg_bg.fgd)
-            else
-                if rtt > HIGH_RTT then
-                    crd_rtt.recolor(colors.red)
-                elseif rtt > WARN_RTT then
-                    crd_rtt.recolor(colors.yellow)
-                else
-                    crd_rtt.recolor(colors.green)
-                end
-            end
-        end)
+        --#region PLC page
+
+        local p_div = Div{parent=panes[2],width=main.get_width()}
+
+        local plc_page = app.new_page(nil, 2)
+        plc_page.tasks = { update }
+
+        TextBox{parent=p_div,y=1,text="PLC Devices",alignment=ALIGN.CENTER}
+
+        local plc_list = ListBox{parent=p_div,y=6,scroll_height=100,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
+        local plc_elems = {}    ---@type graphics_element[]
 
         --#endregion
 
-        --#region overview page
+        --#region RTU page
 
-        local f_pane = panes[db.facility.num_units + 2]
-        local f_div = Div{parent=f_pane,width=main.get_width()}
+        local r_div = Div{parent=panes[2],width=main.get_width()}
 
-        local fac_page = app.new_page(nil, db.facility.num_units + 2)
-        fac_page.tasks = { update }
+        local rtu_page = app.new_page(nil, 3)
+        rtu_page.tasks = { update }
 
-        TextBox{parent=f_div,y=1,text="Facility Monitors",alignment=ALIGN.CENTER}
+        TextBox{parent=r_div,y=1,text="RTU Gateway Devices",alignment=ALIGN.CENTER}
 
-        TextBox{parent=f_div,x=2,y=3,text="Max Radiation",fg_bg=label_fg_bg}
-        local f_rad = RadIndicator{parent=f_div,x=2,label="",format="%17.3f",lu_colors=lu_col,width=21}
-        f_rad.register(f_ps, "radiation", f_rad.update)
+        local rtu_list = ListBox{parent=p_div,y=6,scroll_height=100,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
+        local rtu_elems = {}    ---@type graphics_element[]
 
-        new_mon_list(f_div, f_ps)
+        --#endregion
+
+        --#region RTU page
+
+        local pk_div = Div{parent=panes[2],width=main.get_width()}
+
+        local pkt_page = app.new_page(nil, 4)
+        pkt_page.tasks = { update }
+
+        TextBox{parent=pk_div,y=1,text="Pocket Devices",alignment=ALIGN.CENTER}
+
+        local pkt_list = ListBox{parent=p_div,y=6,scroll_height=100,nav_fg_bg=cpair(colors.lightGray,colors.gray),nav_active=cpair(colors.white,colors.gray)}
+        local pkt_elems = {}    ---@type graphics_element[]
+
+        --#endregion
+
+        --#region connect/disconnect management
+
+        f_ps.subscribe("comp_connect", function (id)
+            local pfx  = "comp_" .. id
+            local type = f_ps.get(pfx .. "_type")
+
+            if type == DEV_TYPE.PLC then
+                plc_elems[id] = Div{parent=plc_list,height=5}
+                local rect = Rectangle{parent=plc_elems[id],height=6,x=2,width=20,border=border(1,colors.gray,true),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
+
+                local title = TextBox{parent=rect,text="PLC (Unit ?) @ "..id}
+                title.register(f_ps, pfx .. "_unit", function (unit) title.set_value("PLC (Unit " .. unit .. ") @ " .. id) end)
+
+                create_common_indicators(pfx, rect)
+            elseif type == DEV_TYPE.RTU then
+                rtu_elems[id] = Div{parent=rtu_list,height=5}
+                local rect = Rectangle{parent=rtu_elems[id],height=6,x=2,width=20,border=border(1,colors.gray,true),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
+
+                TextBox{parent=rect,text="RTU Gateway @ "..id}
+
+                create_common_indicators(pfx, rect)
+            elseif type == DEV_TYPE.PKT then
+                pkt_elems[id] = Div{parent=pkt_list,height=5}
+                local rect = Rectangle{parent=pkt_elems[id],height=6,x=2,width=20,border=border(1,colors.gray,true),thin=true,fg_bg=cpair(colors.black,colors.lightGray)}
+
+                TextBox{parent=rect,text="Pocket @ "..id}
+
+                create_common_indicators(pfx, rect)
+            end
+        end)
+
+        f_ps.subscribe("comp_disconnect", function (id)
+            local type = f_ps.get("comp_" ..id .. "_type")
+
+            if type == DEV_TYPE.PLC then
+                if plc_elems[id] then plc_elems[id].delete() end
+                plc_elems[id] = nil
+            elseif type == DEV_TYPE.RTU then
+                if rtu_elems[id] then rtu_elems[id].delete() end
+                rtu_elems[id] = nil
+            elseif type == DEV_TYPE.PKT then
+                if pkt_elems[id] then pkt_elems[id].delete() end
+                pkt_elems[id] = nil
+            end
+        end)
 
         --#endregion
 
diff --git a/supervisor/session/pocket.lua b/supervisor/session/pocket.lua
index b229286..a47b1cf 100644
--- a/supervisor/session/pocket.lua
+++ b/supervisor/session/pocket.lua
@@ -199,7 +199,7 @@ function pocket.new_session(id, s_addr, i_seq_num, in_queue, out_queue, timeout,
                 for i = 1, #facility.get_units() do
                     local tag = "plc_" .. i
                     if read(tag .. "_conn") then
-                        table.insert(devices, { DEV_TYPE.CRD, read(tag .. "_addr"), read(tag .. "_fw"), read(tag .. "_rtt") })
+                        table.insert(devices, { DEV_TYPE.CRD, read(tag .. "_addr"), read(tag .. "_fw"), read(tag .. "_rtt"), i })
                     end
                 end