Digital voice DV over LoRa

• This modem could be used in conjunction with Android Codec2 Walkie-Talkie, when application connects to the modem, instead of sending AX25 APRS packets it sends Codec2 speech encoded frames over KISS. This enables digital voice communication between one or multiple modems.

• Power on the modem from power bank, computer USB port or phone USB OTG port

• Make sure config option CFG_KISS_EXTENSIONS is set to true

• Go to application settings into KISS section and "Enable Extensions"

• Select appropriate LoRa modem settings, such as frequency, bandwidth, spread factor

• Select Codec2 mode

• Make sure your RF speed is larger than Codec2 mode speed, also S-meter is available with enabled extensions and S-meter indicates signal level above which reception is possible for given LoRa parameters with bold text.

• Alternatively, all LoRa options could be set to default values in config.h, so they will be set immediately after reboot, but S-meter will not be visible