feat: add get_version endpoint for individual sensors

lib/localiser/domain/sensors.ex

@@ -59,6 +59,11 @@ defmodule Localiser.Domain.Sensors do
     {:ok, sensor}
   end
 
+  def get_version(%Sensor{} = sensor) do
+    Localiser.MQTT.Connection.publish(cmd_topic(sensor), Jason.encode!(%{action: "version"}))
+    {:ok, sensor}
+  end
+
   def send_ota_update(%Sensor{} = sensor, url, version) do
     payload = %{
       action: "ota",

lib/localiser/web/controllers/sensor_controller.ex

@@ -239,6 +239,12 @@ defmodule Localiser.Web.Controllers.SensorController do
     json(conn, %{status: "ok"})
   end
 
+  def get_version(conn, %{"id" => id}) do
+    sensor = Sensors.get_sensor!(id)
+    {:ok, _} = Sensors.get_version(sensor)
+    json(conn, %{status: "ok"})
+  end
+
   def reconfigure(conn, %{"id" => id} = params) do
     sensor = Sensors.get_sensor!(id)
     config = Map.take(params, ["ssid", "password", "mqtt_broker", "mqtt_port"])

lib/localiser/web/router.ex

@@ -103,5 +103,6 @@ defmodule Localiser.Web.Router do
     post   "/sensors/:id/reconfigure",         SensorController, :reconfigure
     post   "/sensors/:id/calibration/start",   SensorController, :calibration_start
     post   "/sensors/:id/calibration/stop",    SensorController, :calibration_stop
+    get    "/sensors/:id/version",             SensorController, :get_version
   end
 end