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index.js
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index.js
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var mqtt = require("mqtt");
var Service, Characteristic;
module.exports = function(homebridge) {
Service = homebridge.hap.Service;
Characteristic = homebridge.hap.Characteristic;
homebridge.registerAccessory("homebridge-mqtt-blinds-tasmota", "mqtt-blinds-tasmota", MqttBlindsTasmotaAccessory);
}
function MqttBlindsTasmotaAccessory(log, config) {
// GLOBAL vars
this.log = log;
// CONFIG vars
this.name = config["name"];
this.manufacturer = config['manufacturer'] || "";
this.model = config['model'] || "";
this.serialNumberMAC = config['serialNumberMAC'] || "";
// MQTT vars
this.mqttUrl = config["mqttBrokerUrl"];
this.mqttUsername = config["mqttUsername"];
this.mqttPassword = config["mqttPassword"];
this.mqttClientId = 'mqttjs_' + Math.random().toString(16).substr(2, 8);
// Tasmota vars
this.mqttTopic = config["mqttTopic"];
this.mqttShutterIndex = config["mqttShutterIndex"] || "1";
this.mqttResultTopic = config["mqttResultTopic"] || 'stat/' + this.mqttTopic + '/RESULT';
this.mqttCommandTopic = config["mqttCommandTopic"] || 'cmnd/' + this.mqttTopic + '/ShutterPosition' + this.mqttShutterIndex;
this.mqttTeleTopic = config["mqttTeleTopic"] || 'tele/' + this.mqttTopic + '/SENSOR';
this.mqttShutterName = config["mqttShutterName"] || "Shutter" + this.mqttShutterIndex;
// MQTT options
this.mqttOptions = {
keepalive: 10,
clientId: this.mqttClientId,
protocolId: 'MQTT',
protocolVersion: 4,
clean: true,
reconnectPeriod: 1000,
connectTimeout: 30 * 1000,
username: this.mqttUsername,
password: this.mqttPassword,
rejectUnauthorized: false
};
// STATE vars
this.lastPosition = 100; // last known position of the blinds (open)
this.currentPositionState = 2; // stopped by default
this.currentTargetPosition = this.lastPosition; // same as last known position
// MQTT handling
this.mqttClient = mqtt.connect(this.mqttUrl, this.mqttOptions);
var that = this;
this.mqttClient.on('error', function() {
that.log('Error event on MQTT');
});
this.mqttClient.on('connect', function() {
that.log('MQTT is running');
});
this.mqttClient.on('message', function(topic, message) {
// this callback can be called from both the STAT topic and the TELE topic
// JSON format is nearly the same, eg:
// - TELE : {"Time":"2020-09-12T13:55:32","Shutter1":{"Position":0,"Direction":0,"Target":0},"Shutter2":{"Position":0,"Direction":0,"Target":0}}
// - STAT : {"Shutter2":{"Position":100,"Direction":0,"Target":100}}
message = JSON.parse(message.toString('utf-8'));
if (message.hasOwnProperty(that.mqttShutterName)) {
if (message[that.mqttShutterName].hasOwnProperty('Position')) {
// update CurrentPosition
that.lastPosition = parseInt(message[that.mqttShutterName]["Position"]);
that.service.getCharacteristic(Characteristic.CurrentPosition).updateValue(that.lastPosition);
that.log("Updated CurrentPosition: %s", that.lastPosition);
}
if (message[that.mqttShutterName].hasOwnProperty('Direction')) {
// update PositionState (open = 0 = DECREASING, close = 1 = INCREASING, stop = 2 = STOPPED)
switch(parseInt(message[that.mqttShutterName]["Direction"])) {
case -1:
that.currentPositionState = 0
that.service.getCharacteristic(Characteristic.PositionState).updateValue(that.currentPositionState);
that.log("Updated PositionState: %s", that.currentPositionState);
break
case 1:
that.currentPositionState = 1
that.service.getCharacteristic(Characteristic.PositionState).updateValue(that.currentPositionState);
that.log("Updated PositionState: %s", that.currentPositionState);
break
case 0:
that.currentPositionState = 2
that.service.getCharacteristic(Characteristic.PositionState).updateValue(that.currentPositionState);
that.log("Updated PositionState: %s", that.currentPositionState);
break
default:
that.log("Unknown direction: %s", direction);
}
}
if (message[that.mqttShutterName].hasOwnProperty('Target')) {
// update TargetPosition
that.currentTargetPosition = parseInt(message[that.mqttShutterName]["Target"])
that.service.getCharacteristic(Characteristic.TargetPosition).updateValue(that.currentTargetPosition);
that.log("Updated TargetPosition: %s", that.currentTargetPosition);
}
}
});
// MQTT subscribed
this.mqttClient.subscribe(that.mqttResultTopic);
this.mqttClient.subscribe(that.mqttTeleTopic);
// register the service and provide the functions
this.service = new Service.WindowCovering(this.name);
// the current position (0-100%)
this.service
.getCharacteristic(Characteristic.CurrentPosition)
.on('get', this.getCurrentPosition.bind(this));
// the position state (0 = DECREASING, 1 = INCREASING, 2 = STOPPED)
this.service
.getCharacteristic(Characteristic.PositionState)
.on('get', this.getPositionState.bind(this));
// the target position (0-100%)
this.service
.getCharacteristic(Characteristic.TargetPosition)
.on('get', this.getTargetPosition.bind(this))
.on('set', this.setTargetPosition.bind(this));
// send an empty MQTT command to get the initial state
this.mqttClient.publish(this.mqttCommandTopic, null, this.mqttOptions);
}
// Apple homekit handlers
MqttBlindsTasmotaAccessory.prototype.getCurrentPosition = function(callback) {
this.log("Requested CurrentPosition: %s", this.lastPosition);
callback(null, this.lastPosition);
}
MqttBlindsTasmotaAccessory.prototype.getPositionState = function(callback) {
this.log("Requested PositionState: %s", this.currentPositionState);
callback(null, this.currentPositionState);
}
MqttBlindsTasmotaAccessory.prototype.getTargetPosition = function(callback) {
this.log("Requested TargetPosition: %s", this.currentTargetPosition);
callback(null, this.currentTargetPosition);
}
MqttBlindsTasmotaAccessory.prototype.setTargetPosition = function(pos, callback) {
this.log("Set TargetPosition: %s", pos);
this.mqttClient.publish(this.mqttCommandTopic, pos.toString(), this.mqttOptions);
callback(null);
}
MqttBlindsTasmotaAccessory.prototype.getServices = function() {
var informationService = new Service.AccessoryInformation();
informationService
.setCharacteristic(Characteristic.Name, this.name)
.setCharacteristic(Characteristic.Manufacturer, this.manufacturer)
.setCharacteristic(Characteristic.Model, this.model)
.setCharacteristic(Characteristic.SerialNumber, this.serialNumberMAC);
return [informationService, this.service];
}