Work in Progress...
I have built an ROV largely based on http://techmonkeybusiness.com/rov-control-sketches-fourth-edition.html 2 - It uses 2 Arduino nanos to communicate via EasyTransfer.h and currently it receives sensor data and prints it on a LCD.
I am now trying to use the minimosd to show my sensor data on my FPV goggles - I have searched a ton of forums and tried several complicated examples based on ArduPilots from github but I am really struggling to decode Mavlinks protocols to display simple data from my sensors [ IMU (MPU9250), Temperature/Pressure sensor (MS5803), RTC (DS3231) and external PSI/Depth sensor (A6), voltage (A7) ].