USR-K7 User Manual www.usriot.comJinan USR IOT Technology Limited 53 / 120 inquiry@usriot.com4.4.1. Heartbeat Package FunctionUnder Transparent transmission, have the K7 sent heartbeat package to net server or the serial portHeartbeat package send to the net to keep connecting with server and works in TCP client and UDP client mode.Send heartbeat package to serial port and instead of the query command from net to reduce the communicationflow.3010 and above version supports heartbeat function which can send to serial and net.Diagram 4.4.1-1 Heartbeat Webpage