HAB2 LoRa High Altitude Balloon Tracker Board for RFM9x
This board allows for a minimal part count high altitude balloon traker to be built. If your powering it from 2 x AAA Lithium batteries the only other parts you need are a 3.3V Arduino Pro Mini, RFM9x Lora device, UBLOX Max8Q GPS and some wire
The build instructions and software will be found in the HAB2 repository here. The HAB2 software will send its location payloads in LoRa and FSK RTTY, there is an option for FSK RTTY only mode. In addition the HAB2 software allows for remote control of the tracker in flight. Whilst primarily designed for use in Pico balloons, the board can be used as a tracker for the larger 30,000M + balloons. You can attach an external tracker antenna by fitting an SMA edge socket and the tracker PCBs also come with a GPS breakout PCB so you can connect the GPS by a short cable and have the wire antenna on the outside of the payload. The board can be fitted with a TC74 temperature sensor.
The tracker board can be used as a receiver too, see the Receiver1 repository.
The 2mm pin headers which can be used to mount the RFM9x are included.