Minor enhancements

* Properly disconnect from devices on exit
* Monitor for Home Assistant status and resend discovery

devices/rgbtw-light.js

@@ -5,8 +5,12 @@ const utils = require('../lib/utils')
 
 class RGBTWLight extends TuyaDevice {
     async init() {
-        await this.guessLightInfo()
+        // If no manual config try to detect device settings
+        if (!this.config.dpsPower) { 
+            await this.guessLightInfo()
+        }
 
+        // If detection failed and no manual config return without initializing
         if (!this.guess.dpsPower && !this.config.dpsPower) {
             debug('Automatic discovery of Tuya bulb settings failed and no manual configuration') 
             return
@@ -25,7 +29,6 @@ class RGBTWLight extends TuyaDevice {
         this.config.colorType = this.config.colorType ? this.config.colorType : this.guess.colorType
 
         this.deviceData.mdl = 'RGBTW Light'
-
         this.isRgbtwLight = true
 
         // Map generic DPS topics to device specific topic names
@@ -66,7 +69,7 @@ class RGBTWLight extends TuyaDevice {
 
         // If device supports Color Temperature add color temp device topic
         if (this.config.dpsColorTemp) {
-            // Values used for tranform
+            // Values used for tranforming from 1-255 scale to mireds range
             const rangeFactor = (this.config.maxColorTemp-this.config.minColorTemp)/100
             const scaleFactor = this.config.colorTempScale/100
             const tuyaMaxColorTemp = this.config.maxColorTemp/rangeFactor*scaleFactor
@@ -104,6 +107,9 @@ class RGBTWLight extends TuyaDevice {
             white_value_state_topic: this.baseTopic+'white_brightness_state',
             white_value_command_topic: this.baseTopic+'white_brightness_command',
             white_value_scale: 100,
+            availability_topic: this.baseTopic+'status',
+            payload_available: 'online',
+            payload_not_available: 'offline',
             unique_id: this.config.id,
             device: this.deviceData
         }

devices/simple-dimmer.js

@@ -44,6 +44,9 @@ class SimpleDimmer extends TuyaDevice {
             command_topic: this.baseTopic+'command',
             brightness_state_topic: this.baseTopic+'brightness_state',
             brightness_command_topic: this.baseTopic+'brightness_command',
+            availability_topic: this.baseTopic+'status',
+            payload_available: 'online',
+            payload_not_available: 'offline',
             unique_id: this.config.id,
             device: this.deviceData
         }

devices/simple-switch.js

@@ -33,6 +33,9 @@ class SimpleSwitch extends TuyaDevice {
             name: (this.config.name) ? this.config.name : this.config.id,
             state_topic: this.baseTopic+'state',
             command_topic: this.baseTopic+'command',
+            availability_topic: this.baseTopic+'status',
+            payload_available: 'online',
+            payload_not_available: 'offline',
             unique_id: this.config.id,
             device: this.deviceData
         }

devices/tuya-device.js

@@ -1,7 +1,6 @@
 const TuyAPI = require('tuyapi')
 const { evaluate } = require('mathjs')
 const utils = require('../lib/utils')
-const { msSleep } = require('../lib/utils')
 const debug = require('debug')('tuya-mqtt:tuyapi')
 const debugState = require('debug')('tuya-mqtt:state')
 const debugCommand = require('debug')('tuya-mqtt:command')

tuya-mqtt.js

@@ -9,10 +9,27 @@ const SimpleSwitch = require('./devices/simple-switch')
 const SimpleDimmer = require('./devices/simple-dimmer')
 const RGBTWLight = require('./devices/rgbtw-light')
 const GenericDevice = require('./devices/generic-device')
+const utils = require('./lib/utils')
 
 var CONFIG = undefined
 var tuyaDevices = new Array()
 
+// Setup Exit Handlers
+process.on('exit', processExit.bind(0))
+process.on('SIGINT', processExit.bind(0))
+process.on('SIGTERM', processExit.bind(0))
+process.on('uncaughtException', processExit.bind(1))
+
+// Set unreachable status on exit
+async function processExit(exitCode) {
+    for (let tuyaDevice of tuyaDevices) {
+        tuyaDevice.device.disconnect()
+    }
+    if (exitCode || exitCode === 0) debug('Exit code: '+exitCode)
+    await utils.sleep(1)
+    process.exit()
+}
+
 function getDevice(configDevice, mqttClient) {
     const deviceInfo = {
         configDevice: configDevice,
@@ -40,6 +57,15 @@ function initDevices(configDevices, mqttClient) {
     }
 }
 
+async function republishDevices() {
+    // Republish devices and state after 30 seconds if restart of HA is detected
+    debug('Resending device config/state in 30 seconds')
+    await utils.sleep(30)
+    for (let device of tuyaDevices) {
+        device.init()
+    }
+}
+
 // Main code function
 const main = async() => {
     let configDevices
@@ -84,10 +110,9 @@ const main = async() => {
     mqttClient.on('connect', function (err) {
         debug('Connection established to MQTT server')
         let topic = CONFIG.topic + '#'
-        mqttClient.subscribe(topic, {
+        mqttClient.subscribe(topic)
-            retain: CONFIG.retain,
+        mqttClient.subscribe('homeassistant/status')
-            qos: CONFIG.qos
+        mqttClient.subscribe('hass/status')
-        })
         initDevices(configDevices, mqttClient)
     })
 
@@ -111,8 +136,13 @@ const main = async() => {
             const commandTopic = splitTopic[topicLength - 1]
             const deviceTopicLevel = splitTopic[1]
 
-            // If it looks like a valid command topic try to process it
+            if (topic === 'homeassistant/status' || topic === 'hass/status' ) {
-            if (commandTopic.includes('command')) {
+                debug('Home Assistant state topic '+topic+' received message: '+message)
+                if (message === 'online') {
+                    republishDevices()
+                }
+            } else if (commandTopic.includes('command')) {
+                // If it looks like a valid command topic try to process it
                 debugCommand('Received MQTT message -> ', JSON.stringify({
                     topic: topic,
                     message: message