Add module to report soc temperature

config/target/dev.exs

@@ -36,9 +36,12 @@ config :farmbot, :init, [
   # Stops the disk from getting full.
   Farmbot.Target.Network.TzdataTask,
 
+  # Reports SOC temperature to BotState
+  Farmbot.Target.SocTempWorker,
+
   # Debug stuff
   Farmbot.System.Debug,
-  Farmbot.Target.Uevent.Supervisor
+  Farmbot.Target.Uevent.Supervisor,
 ]
 
 config :farmbot, :transport, [

lib/farmbot/bot_state/bot_state.ex

@@ -52,6 +52,10 @@ defmodule Farmbot.BotState do
     end
   end
 
+  def report_soc_temp(temp_celcius) when is_number(temp_celcius) do
+    GenStage.call(__MODULE__, {:report_soc_temp, temp_celcius})
+  end
+
   def locked? do
     GenStage.call(__MODULE__, :locked?)
   end
@@ -165,6 +169,11 @@ defmodule Farmbot.BotState do
     {:noreply, [state], state}
   end
 
+  def handle_call({:report_soc_temp, temp}, _from, state) do
+    new_info_settings = %{state.informational_settings | soc_temp: temp}
+    {:reply, :ok, %{state | informational_settings: new_info_settings}}
+  end
+
   def handle_call(:locked?, _from, state) do
     {:reply, state.informational_settings.locked, [], state}
   end
@@ -329,7 +338,8 @@ defmodule Farmbot.BotState do
       sync_status: :booting,
       last_status: nil,
       locked: false,
-      cache_bust: 0
+      cache_bust: 0,
+      soc_temp: 0,
     },
     location_data: %{
       position: %{x: nil, y: nil, z: nil},

platform/target/soc_temp_worker.ex

@@ -0,0 +1,28 @@
+defmodule Farmbot.Target.SocTempWorker do
+  use GenServer
+  def start_link(_, opts) do
+    GenServer.start_link(__MODULE__, [], opts)
+  end
+
+  def init([]) do
+    send(self(), :report_temp)
+    {:ok, %{}}
+  end
+
+  def handle_info(:report_temp, state) do
+    {temp_str, 0} = Nerves.Runtime.cmd("vcgencmd", ["measure_temp"], :return)
+    temp = temp_str
+      |> String.trim()
+      |> String.split("=")
+      |> List.last()
+      |> Float.parse
+      |> elem(0)
+    if GenServer.whereis(Farmbot.BotState) do
+      Farmbot.BotState.report_soc_temp(temp)
+      Process.send_after(self(), :report_temp, 60_000)
+    else
+      Process.send_after(self(), :report_temp, 5000)
+    end
+    {:noreply, state}
+  end
+end