code: function onMessage(msg, rinfo) {
              // if the message starts with the bytes "0x23, 0x02" (i.e. a Z/IP packet) then accept this as our gateway
              // TODO: consider checking the sequence number in this packet, to make sure it matches the packet we sent
              if (msg.length >= 15 && msg[0] === 0x23 && msg[1] === 0x02 && msg[14] === thisObject.findGatewaySequenceNumber && rinfo.family === "IPv4") {
                  gatewayFound = true;
                  resolve(rinfo.address);
              }
          }
docs: do not let this socket's reference block node.js from exiting