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sh123 edited this page Oct 23, 2021 · 21 revisions

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Description

Amateur radio ESP32 based LoRa APRSDroid KISS Bluetooth/BLE/USB/TCPIP modem + APRS-IS RX/TX iGate server over WiFI + digipeater + Codec2 DV modem (in conjunction with Android application)

Features

Can be used in two modes, mode seleciton is done by changing cfg.IsClientMode or CFG_IS_CLIENT_MODE define in config.h:

  • LoRa APRS KISS client over bluetooth, WiFi and iGate are switched off, mobile or portable usage (/M, /P)
    • you need to use APRSDroid application (https://aprsdroid.org) or iOS aprs.fi official application, connect to the modem using bluetooth, data will be re-transmitted through the LoRa radio, this is similar to APRSDroid micromodem - https://unsigned.io/micromodem/, received data will be sent back to the APRSDroid using bluetooth
    • by having two APRSDroid clients you can not only send your position, but also send and receive APRS messages
    • it is also possible to use other KISS APRS clients over Bluetooth serial, just use rfcomm on Linux to setup serial over Bluetooth and put up AX25 interface with kissattach, then use any existing Linux APRS clients, such as xastir, see section below for alternative Linux usage
  • LoRa APRS iGate RX/TX server over WiFi + Digipeater, stationary usage at home
    • RF to APRS-IS gating, it will connect to your WiFI and will forward received APRS positions from RF LoRa into the APRS-IS network, it also reports client signal level, by appending it into the APRS comment, so you can see your signal reports in different locations (could be enabled or disabled from config). This way, it is also possible to setup portable iGate by connecting to your mobile phone's hotspot and provide power from the phone USB port by using USB-OTG cable
    • APRS-IS to RF gating, it is possible to enable it together with the filter in the config, so APRS-IS data will be forwarded to RF
    • RF digirepating for WIDEn-n new style paths
    • Beaconing, own station periodic beacon announcement to APRS-IS and RF
    • if cfg.BtName is NOT set to empty string then server mode also allows to connect with KISS bluetooth client and use it simulatenously with iGate functionality, e.g. when stationary at home and want to use DV Codec2 Walkie-Talkie voice communication

Voice over LoRa

Modem could also be used for LoRa Codec2 digital voice DV communication

  • just install Codec2 Walkie-Talkie on you Android phone, pair with the modem and you can communicate with each other by using digital voice Codec2, also modem can be controlled from this application (frequency change, bandwidth, spreading factor, etc)
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