Update README.md

README.md

@@ -62,6 +62,25 @@ All work was done on ESP32-WROOM with custom made LoRa shield, if your ESP32 boa
 # Protocol Compatibility
 This project is using classical `AX25` frames over LoRa (as defined in http://www.aprs.org/doc/APRS101.PDF page 12) with given LoRa parameters above and `AX25` frames are encapsulated into `KISS` frames when transferred over serial Bluetooth to phone or PC. It should enable interoperability with classical Linux APRS software and `kissattach`. Some LoRa ARPS implementations transfer plain text APRS messages over LoRa, as a result interoperability with this project is not guaranteed.
 
+# Alternative Linux Setup
+It is possible to user other generic Linux ax25/aprs tools, such as `xastir`, use next procedure to set it up
+- Install required tools: ```sudo apt-get install ax25-tools ax25-apps xastir bluez bluez-tools```
+- Run bluetoothctl and pair to the modem: 
+  ```
+  # bluetoothctl
+  [bluetooth]# agent on
+  [bluetooth]# default-agent
+  [NEW] Device 01:02:03:04:05:06 loraprs
+  [bluetooth]# pair 01:02:03:04:05:06
+  Attempting to pair with 30:AE:A4:14:40:C2
+  Pairing successful
+  [bluetooth]# exit
+  ```
+- Run `rfcomm` to setup serial over Bluetooth at `/dev/rfcomm0`: `sudo rfcomm bind 0 01:02:03:04:05:06`
+- At this stage you can already start using `xastir` or any other application, which can operate over KISS Serial TNC
+- Alternatively, you can setup `AX25` network interface with `sudo kissattach /dev/rfcomm0 ax25` command, but previously need to update `/etc/ax25/axports` with new line as `ax25    CALLSIGN-10        9600    255     1       comment`
+- Run `axlisten` to capture incoming and outgoing traffic as `sudo axlisten -a`
+
 # Test Results
 ![alt text](images/setup.png)
 - Antennas