A TX-only TNC (Terminal Node Controller) to generate the AFSK (Audio Frequency-Shift Keying) audio tones for APRS (Automatic Packet Reporting System) messages using a RP2040 microcontroller on a Raspberry Pi Pico board.
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The Nucleo TNC is a breadboard implementation of the Mobilinkd TNC3 using a STM32L432KC Nucleo32 board. This TNC faithfully implements the audio section and EEPROM storage of the TNC3. It omits the battery charging and Bluetooth components of the TNC3.
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This project RadioDSP define a experimental open platform to build Real Time filtering and audio digital signal elaboration from a source audio signal in output from radio transceiver or receiver
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