Update README.md

README.md

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 # Introduction
 ![Modes of operation](images/diagram.png)
 
-This project is amateur radio ESP32 based LoRa KISS Bluetooth/BLE/USB/TCPIP modem + LoRa APRS-IS RX/TX iGate server over WiFI + digipeater + Codec2 DV modem
+This project is amateur radio ESP32 based LoRa **KISS Bluetooth/BLE/USB/TCPIP** modem + LoRa **APRS-IS RX/TX iGate** server over WiFI + **digipeater** + **Codec2 DV modem**. 
+
+Project also supports APRSDroid TNC2 mode and interoperable with other LoRa APRS trackers, which do NOT use AX25.
 
 - For project description, setup and more information, please, visit our Wiki at https://github.com/sh123/esp32_loraprs/wiki
 - For discussions, visit https://github.com/sh123/esp32_loraprs/discussions