added a firmware check and sensor configuration

Home-Assistant.md

@@ -126,4 +126,60 @@ This can also be done manually in Home Assistant UI through Developer tools - ![
       data:
         topic: "sonoffs/cmnd/SetOption19"
         payload: "1"
-```
+```
+### Tip: Make all Tasmota devices report their firmware version
+
+```
+- id: 'sonoff_firmware_installed'
+  alias: Sonoff Firmware Installed
+  trigger:
+  - event: start
+    platform: homeassistant
+  action:
+  - data:
+      payload: '2'
+      topic: sonoffs/cmnd/status
+    service: mqtt.publish
+  initial_state: 'true'
+```
+Then you can make a sensor that detects the latest version of Tasmota and alerts you if there is an update.
+From my configuration.yaml
+```
+# Tasmota Firmware
+# Getting Firmware from JSON for Tasmota
+  - platform: rest
+    resource: https://api.github.com/repos/arendst/Sonoff-Tasmota/releases/latest
+    name: Sonoff Firmware Version Available
+    username: !secret githubuser
+    password: !secret githubpass
+    authentication: basic
+    value_template: '{{ value_json.tag_name }}'
+    headers:
+      Accept: application/vnd.github.v3+json
+      Content-Type: application/json
+      User-Agent: Home Assistant REST sensor
+  - platform: mqtt
+    name: "Coffee Maker Firmware"
+    state_topic: "sonoff1/stat/STATUS2"
+    value_template: 'v{{ value_json.StatusFWR.Version }}'
+  - platform: mqtt
+    name: "Garage Door Firmware"
+    state_topic: "sonoff5/stat/STATUS2"
+    value_template: 'v{{ value_json.StatusFWR.Version }}'
+binary_sensor:
+  - platform: template
+    sensors:
+      sonoff_update_available:
+        value_template: >-
+          {{ (states.sensor.sonoff_firmware_version_available.state > states.sensor.coffee_maker_firmware.state) or (states.sensor.sonoff_firmware_version_available.state > states.sensor.garage_door_firmware.state)
+              }}
+```
+Note the above is for 2 switches.
+
+In customize.yaml
+```
+binary_sensor.sonoff_update_available:
+  friendly_name: Update Available Sonoff
+  device_class: problem
+```
+Then it will show as an alert icon that you can show in Lovelace.