433-utils/src/Transmitter.ts

This project is a portage in TypeScript of the repository https://github.com/ninjablocks/433Utils

/**
 * 09/02/2020
 * @author Baudev
 */

const { spawn } = require( 'child_process' );

export default class Transmitter {

    protected sniffer: any;
    protected pin: number;

    constructor(pin: number = 0) {
        if(!Number.isInteger(pin)){
            throw Error("PIN must be an integer.");
        }
        // we check the validity of the PIN
        this.pin = pin;
    }

    /**
     * Sends the message
     * @param systemCode
     * @param unitCode
     * @param command Command is 0 for OFF and 1 for ON
     * @param pulseLength
     */
    send(systemCode: number, unitCode: number, command: number, pulseLength: number = 0): Promise<[number, number, number]>{
        this.sniffer = spawn(__dirname + '/../custom433Utils/customSend ', [ systemCode, unitCode, command, pulseLength, this.pin ]);

        return new Promise((resolve => {
            this.sniffer.stdout.on('data', (data: string) => {
                // for each message sent
                let values = data.split(",");
                return resolve([Number(values[0]), Number(values[1]), Number(values[2])]);
            });
        }));
    }

}