Method echoback

modules/drivers/sakuraio/sakuraio.js:89–91

(data)

		return this.execute(CMD.GET_CONNECTION_STATUS, null, 1)[0];
	}
	echoback(data) {
		return this.execute(CMD.ECHO_BACK, data, data.length);
	}
	getUnixTime() {
		let result = this.execute(CMD.GET_DATETIME, null, 8);	// 64 bit little-endian result. use low 6 bytes.
		let time = 0;