OpenTJP tracker firmware

Features

• all bands 10 meters to 160 meters
• optional I2C MLX90614 IR temperature sensor
• geofencing of grid squares
• Extended Telemetry (ET) in 3rd slot
• pin-compatible with Raspberry Pi Pico and Pico 2
• BSD license

Installation steps

1. Watch this video about using the Pico with Thonny and MicroPython.

2. Install Thonny and the MicroPython UF2.

   • Thonny may automatically install the MicroPython UF2 for you, or you can manually install for Pico 1 or Pico 2.
   • I have only tested using MicroPython v1.24.1 (date 2024-11-29), but later versions probably work just fine.

3. Copy/rename the file main_tracker.py to main.py.

4. Edit main.py. Change the channel, callsign, and band as you see fit.

5. Save/upload the 2 files main.py and SI5351.py to the Pico.

   • Note: If you make future edits to main.py, then make sure your changes are saved to the Pico.
   • The SI5351.py file shouldn't need updating, but make sure it is saved to the Pico.

6. Reboot the Pico. (Ctrl-D in Thonny, or Disconnect and run stand-alone)

Configuration

Setup variable	Description
MY_CHANNEL	U4B channel 0-599 (number)
MY_CALLSIGN	Your plain callsign (string)
MY_BAND	Band 10m-160m (string)
MY_ET_ENABLE	Enable ET transmission (True/False)
MY_GEOFENCE_ENABLE	Enable blocking geofenced grids (True/False)
MY_DEBUG_PRINT_ENABLE	Enable serial printouts for debugging (True/False)
MY_HIGH_PRECISION_ALT_THRESH	Max altitude for high-precision ET message (number)
MY_FREQ_OFFSET	Adjustment for output freq (-20 to +20 Hz)