- Should be firmware compatible to the OpenModem, so that the Unsigned.io tools can be used to interact with it. This also includes the ability to function as a TNC for use with:
APRSdroid: APRS is an awful protocol to support : inconsistent, inefficient- Sideband for Android. It's better thought out than APRSdroid and includes encryption.
- Codec2_talkie
- Interfacing with the RNode should be done over Bluetooth. No wired connections between the RNode and the smartphone.
- Radio interface should be M17-compatible, or very similar. 9600baud, 4FSK, 12.5kHz channel spacing.
- Bluetooth serial port support
- Battery operated
- Charge via USB-C
- OHIS-SATA-interface to HTs.
- M17 Analog Hotspot Gateway Project:
- supported hardware: ESP32DR Simple or ESP32DR_SA818
- using ESP-Arduino development on VScode
- support M17 mref reflector
- support noise cancellation
- support AGC
- doesn't use an audio codec. Uses opamp circuits for audio filtering
- VHF/UHF Transceiver Personality Board
- SA868 board with SMD-filter
- VoltNode UHF repeater
- ESP32TNC
- FX.25 KISS TNC
- 1200baud AFSK
- runs on M5StickC Plus hardware
- ESP32TNC HAT : interface to audio ports of RF-transceiver