const mqtt_payload = payload.find((data) => data.variable === "payload" ||
(data.metadata && data.metadata.mqtt_topic));
if (mqtt_payload) {
	const buffer = Buffer.from(mqtt_payload.value, 'hex')
	
	var data = [];
	var aux;
	
	for(var i = 0;i < 60; i++)
	{
		aux = buffer[i * 2];
		aux <<= 8;
		aux |= buffer[(i * 2) + 1];
		aux = (aux/10).toFixed(1);
	
		data.push({variable:'level', value:aux, unit:'%'});    
	}

	const group = String(new Date().getTime());
	console.log(group);
	payload = payload.concat(data).map(x => ({ ...x, group }));
}