LightAPRS-W 2.0 is an affordable, smallest, lightest, powerful and open source APRS tracker with WSPR. It makes tracking pico balloons simple and easy. It is able to report location, altitude, ...

LoRa ESP32 KISS Bluetooth modem (for APRSDroid or aprs.fi iOS) + APRS-IS RX/TX iGate over WiFi + Digipeater + DV (with Codec2 Walkie-Talkie) ...