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sensor.js
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sensor.js
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'use strict';
const bme280 = require('bme280');
var debug = require('debug')('BME280');
var logger = require("mcuiot-logger").logger;
const moment = require('moment');
var os = require("os");
var hostname = os.hostname();
const delay = millis => new Promise(resolve => setTimeout(resolve, millis));
const fixed2 = number => (Math.round(number * 100) / 100).toFixed(2);
const round1 = number => Math.round(number * 10) / 10;
let Service, Characteristic;
var CustomCharacteristic;
var FakeGatoHistoryService;
module.exports = (homebridge) => {
Service = homebridge.hap.Service;
Characteristic = homebridge.hap.Characteristic;
CustomCharacteristic = require('./lib/CustomCharacteristic.js')(homebridge);
FakeGatoHistoryService = require('fakegato-history')(homebridge);
homebridge.registerAccessory('@iainfarq/homebridge-bme280', 'BME280', BME280Plugin);
};
class BME280Plugin {
constructor(log, config) {
this.log = log;
this.name = config.name;
this.name_temperature = config.name_temperature || this.name;
this.name_humidity = config.name_humidity || this.name;
this.refresh = config['refresh'] || 30; // Update every 30 seconds
this.options = config.options || {};
if (!("forcedMode" in config.options)) this.options.forcedMode = true; // default to forcedMode
this.spreadsheetId = config['spreadsheetId'];
if (this.spreadsheetId) {
this.log_event_counter = 59;
this.logger = new logger(this.spreadsheetId);
}
this.init = false;
this.data = {};
if ('i2cBusNo' in this.options) this.options.i2cBusNo = parseInt(this.options.i2cBusNo);
if ('i2cAddress' in this.options) this.options.i2cAddress = parseInt(this.options.i2cAddress);
if ('humidityOversampling' in this.options) this.options.humidityOversampling = eval("bme280."+this.options.humidityOversampling);
if ('pressureOversampling' in this.options) this.options.pressureOversampling = eval("bme280."+this.options.pressureOversampling);
if ('temperatureOversampling' in this.options) this.options.temperatureOversampling = eval("bme280."+this.options.temperatureOversampling);
if ('filterCoefficient' in this.options) this.options.filterCoefficient = eval("bme280."+this.options.filterCoefficient);
if ('standby' in this.options) this.options.standby = eval("bme280."+this.options.standby);
this.log(`BME280 sensor options: ${JSON.stringify(this.options)}`);
bme280.open(this.options)
.then((sensor) => {
this.log(`BME280 initialization succeeded`);
this.sensor = sensor;
this.init = true;
this.devicePolling.bind(this);
})
.catch(err => this.log(`BME280 initialization failed: ${err} `));
this.informationService = new Service.AccessoryInformation();
this.informationService
.setCharacteristic(Characteristic.Manufacturer, "Bosch")
.setCharacteristic(Characteristic.Model, "RPI-BME280")
.setCharacteristic(Characteristic.SerialNumber, hostname + "-" + hostname)
.setCharacteristic(Characteristic.FirmwareRevision, require('./package.json').version);
this.temperatureService = new Service.TemperatureSensor(this.name_temperature);
this.temperatureService
.getCharacteristic(Characteristic.CurrentTemperature)
.setProps({
minValue: -100,
maxValue: 100
});
this.temperatureService
.addCharacteristic(CustomCharacteristic.AtmosphericPressureLevel);
this.humidityService = new Service.HumiditySensor(this.name_humidity);
setInterval(this.devicePolling.bind(this), this.refresh * 1000);
this.temperatureService.log = this.log;
this.loggingService = new FakeGatoHistoryService("weather", this.temperatureService);
}
async forcedRead() {
await this.sensor.triggerForcedMeasurement();
await delay( 2* this.sensor.maximumMeasurementTime());
}
devicePolling() {
if (this.sensor) {
if (this.options.forcedMode) {
this.forcedRead();
}
this.sensor.read()
.then(data => {
this.log(`${fixed2(data.temperature)}°C, ` +
`${fixed2(data.pressure)} hPa, ` +
`${fixed2(data.humidity)}%`);
this.loggingService.addEntry({
time: moment().unix(),
temp: round1(data.temperature),
pressure: round1(data.pressure),
humidity: round1(data.humidity)
});
if (this.spreadsheetId) {
this.log_event_counter = this.log_event_counter + 1;
if (this.log_event_counter > 59) {
this.logger.storeBME(this.name, 0, round1(data.temperature), round1(data.humidity), round1(data.pressure));
this.log_event_counter = 0;
}
}
this.temperatureService
.setCharacteristic(Characteristic.CurrentTemperature, round1(data.temperature));
this.temperatureService
.setCharacteristic(CustomCharacteristic.AtmosphericPressureLevel, round1(data.pressure));
this.humidityService
.setCharacteristic(Characteristic.CurrentRelativeHumidity, round1(data.humidity));
})
.catch(err => {
this.log(`BME read error: ${err}`);
debug(err.stack);
if (this.spreadsheetId) {
this.logger.storeBME(this.name, 1, -999, -999, -999);
}
});
} else {
this.log("Error: BME280 Not Initalized");
}
}
getServices() {
return [this.informationService, this.temperatureService, this.humidityService, this.loggingService]
}
}