This is the Raspberry Pi Python software to use with the FlexTrak board:
https://store.uputronics.com/index.php?route=product/product&product_id=118
See separate FlexTrakAVR repository for the Pi host software in Python:
https://github.com/daveake/flexavr
For documentation on this firmware. the Pi host software, and the serial protocol that they share, see the FlexTrak manual:
https://github.com/daveake/HAB-Documentation/blob/main/FlexTrak%20Manual.pdf
V1.22 - Added support to sending field list
V1.20 - Support for user-supplied telemetry fields. Fix for full-size image dimensions.
V1.10 - AVR comms improvements, APRS support
V1.00 - Initial commit