Air modules with one ground module

I have one ground station, multiple aircraft with air modules, all are 915mhz radios. I mistakenly thought I could have just one ground module that would work with all if the air modules one at a time. It appears this is not true, at least I have not been able to make it work so far. I don’t want to go out to fly and have to change the ground radio to the every time I change aircraft at the field. I use one RC transmitter with multiple configurations for multiple aircraft. Is this possible?

Sure is. I have been using the same 915mhz Ground telemetry radio with all craft (~8 or so) for 4 years. Of course the settings have to be the same on each air radio and match the ground radio.

Have you looked at this

All you have to do is make sure that all of the telemetry radios (air and ground) have the same Net ID.

Also, if you want to keep the logs organized give each aircraft frame type a unique MavLink ID.

SYSID_THISMAV: MAVLink system ID of this vehicle
Note: This parameter is for advanced users
Allows setting an individual MAVLink system id for this vehicle to distinguish it from others on the same network

1 - 255

I have 3 quads and a hex. The hex uses the default ID of 1. The quads use IDs 1,2, and 3.

Using this I have a Hexarotor folder with a “1” sub folder and a Quadrotor folder with subfolders 1, 2, and 3.

I’m trying to accomplish using one ground telemetry module with multiple air modules as well without luck. I’ve connected both radios (from separate “pairs”) to Mission Planner and ensured the required settings match, including Net ID but the radios will not communicate. However they will continue to communicate with the other half of their original “pair”. Is there a procedure or step that I’m missing?