bt-sensors-plugin-sk/sensor_classes/GoveeH50xx.js

Bluetooth Sensors for Signalk -- support for Victron devices, RuuviTag, Xiaomi, ATC and Inkbird, Ultrasonic wind meters, Mopeka tank readers, Renogy Battery and Solar Controllers, Aranet4 environment sensors, SwitchBot temp and humidity sensors, Kilovault

const BTSensor = require("../BTSensor");

class GoveeH50xx extends  BTSensor {

    static async  identify(device){
        const regex = /^Govee_H50[0-9]{2}_[a-f,A-F,0-9]{4}$/
        //this.getManufacturer()
        const name = await this.getDeviceProp(device,"Name")
        const uuids = await this.getDeviceProp(device,'UUIDs')
 
        if (name && name.match(regex) && 
            uuids && uuids.length > 0 && 
            uuids[0] == '0000ec88-0000-1000-8000-00805f9b34fb')
            return this
        else
            return null
        t
    }

    async init(){
        await super.init()
        this.initMetadata()
    }
    initMetadata(){
        this.addMetadatum('temp','K', 'temperature', 
            (buffer)=>{return 273.15+(buffer.readUInt16LE(1)/100) 
        })
        this.addMetadatum('humidity','ratio', 'humidity', 
            (buffer)=>{return buffer.readUInt16LE(3)/10000    
        })
        this.addMetadatum('battery','ratio', 'battery strength', (buffer)=>{return buffer.readUInt8(5)/100})
    }

    getManufacturer(){
        return "Govee"
    }
    async propertiesChanged(props){
        super.propertiesChanged(props)    
        if (!props.hasOwnProperty("ManufacturerData")) return

        const buffer = this.getManufacturerData(0xec88)
        if (buffer) {
            this.emitValuesFrom(buffer)
        }      
   }                         
}
module.exports=GoveeH50xx