packet-decoder/src/devices/SmartEnds/BrighterBins.js

SenRa Packet Decoder For IOT devices

class BrighterBins {
    
    constructor(packet) {
        
        packet = parseInt(packet.toUpperCase(),16).toString(2).padStart(24,'0');
        this.packet_type = this.getPacketType(packet.substring(packet.length-2,packet.length));
        this.payload = this.getPayload(packet.substring(0, packet.length-2));
    }

    comparePacket(prev_packet) {
        return this.payload.status === prev_packet.payload.status;
    }

    getPacketType(packet_type) {

        switch (packet_type) {
            case '00':
                return 'FILL_LEVEL_FRAME';
            case '01':
                return 'RAW_DISTANCE_FRAME';    
        }
        return null;
    }

    getPayload(payload) {

        switch (this.packet_type) {
            case 'FILL_LEVEL_FRAME':
                return {
                    status: parseInt(payload.substring(payload.length-7, payload.length),2),
                    temperature: parseInt(payload.substring(payload.length-14, payload.length-7),2)-40,
                    battery_status: parseInt(payload.substring(payload.length-20, payload.length-14),2)*2,
                };
            case 'RAW_DISTANCE_FRAME':
                const dist = 500 - parseInt(payload.substring(payload.length-9, payload.length),2); 
                return {
                    raw_distance: parseInt(payload.substring(payload.length-9, payload.length),2),
                    status:(dist/500)*100,
                    temperature: parseInt(payload.substring(payload.length-16, payload.length-9),2)-40,
                    battery_status: parseInt(payload.substring(payload.length-22, payload.length-16),2)*2,
                };

        }
    }

}

module.exports = BrighterBins;