Heartbeat Error connecting ESP8266 to Mission Planner

I‘m trying to use a ESP8266 Module to communicate with ArduPilot and Mission Planner. I‘ve got it all set up and it seems like Mission Planner connects to ESP, but it says that there’s a timeout error and no heartbeat could be detected. Got any ideas on how to solve this issue?

Hello @cobr4,

MAVLink detects that have another device to connect to it via heartbeat messages, it works like a “vital sign” of the other device, streamed at 1Hz. Be sure that your ESP device is receiving ardupilot FC messages and passing thru to Mission Planner.