homebridge-raspberry-pi-sensehat/dist/raspberryTemperatureAccessory.js

A Homebridge plugin for Raspberry Pi SenseHAT

import { debounce } from './utils.js';
import { exec } from 'child_process';
/**
 * Platform Accessory "Raspberry Temperature"
 */
export class RaspberryTemperatureAccessory {
    platform;
    accessory;
    temperatureService;
    temperature = 0;
    constructor(platform, accessory) {
        this.platform = platform;
        this.accessory = accessory;
        // set accessory information
        this.accessory.getService(this.platform.Service.AccessoryInformation)
            .setCharacteristic(this.platform.Characteristic.Manufacturer, 'Raspberry')
            .setCharacteristic(this.platform.Characteristic.Model, 'Pi')
            .setCharacteristic(this.platform.Characteristic.FirmwareRevision, '1.0')
            .setCharacteristic(this.platform.Characteristic.SerialNumber, '1.0');
        // create a temperature sensor service
        this.temperatureService = this.accessory.getService(this.platform.Service.TemperatureSensor) ||
            this.accessory.addService(this.platform.Service.TemperatureSensor, accessory.context.device.displayName, 'raspberry-temperature');
        this.temperatureService.getCharacteristic(this.platform.Characteristic.CurrentTemperature)
            .onGet(this.getCurrentTemperature.bind(this));
    }
    // handle get requests from HomeKit for the temperature sensor
    async getCurrentTemperature() {
        await this.getTemperature();
        return this.temperature;
    }
    getTemperature = debounce(async () => {
        await new Promise((resolve, reject) => {
            exec(`${this.platform.pythonName} ${this.platform.scriptPath}/getTemperature.py`, (error, stdout) => {
                if (!error) {
                    this.temperature = parseFloat(stdout);
                    this.temperatureService.updateCharacteristic(this.platform.Characteristic.CurrentTemperature, this.temperature);
                    this.platform.log.debug(`${this.accessory.context.device.displayName} getTemperature: ${this.temperature}C`);
                    resolve();
                }
                else {
                    this.platform.log.error(`${this.accessory.context.device.displayName} getTemperature failed: ${error}`);
                    reject(error);
                }
            });
        });
    }, 1000);
}
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