"My Minimosd work well with pre releases but not the RSSI.
Because i don't arrive the change for RSSI in code with Arduimo.
I would try to do with MP for "Arducopter V2.8.1 Quad" if it is more easy.
I don't arrive with Arduimo.
So i have made an upload with "Load custom firmware" in MP.
But for my APM1 i take this file: "MinimOSD Extra 2.1.5 Pre Release Version r431."
It was not good....
I love your MinimOSD-Extra.
How could i tuning RSSI with only Mission Planner?
I don't know how to enable this function in APM. Go to APM_Config.h and add: "#define RECEIVER_RSSI_PIN 6".
"I'm afraid the only way use a 1280 now is to compile the source yourself on Arduino, and upload the old fashioned way (i.e not with the planner.) You'll have to disable some stuff (like logging and autodetecting GPS) in order to get the…"