update old post about packet-radio

content/posts/2024/64-packet-radio-vara-mobilinkd-and-digirig-on-linux/index.md

@@ -4,7 +4,7 @@ summary: >
   Some basic configuration of my HF and VHF/UHF rigs to participate in the
   Winlink world...
 date: 2024-03-30T22:28:25+0100
-lastmod: 2024-04-28T09:14:37+0000
+lastmod: 2024-05-04T12:25:56+0000
 coverCaption: An example, a session to OE7XKG-10 on 144.950 MHz.
 categories:
 - amateur-radio
@@ -187,6 +187,8 @@ The Mobilinkd TNC4 is a KISS TNC and does not provide a USB soundcard -- I only
 the Mobilinkd in conjunction with packet radio.
 {{< /alert >}}
 
+### Winlink
+
 I will use <kbd>AX.25+linux</kbd> in pat with the TNC4 paired via Bluetooth.
 
 First of all, power on the TNC4 and pair it -- I use _blueman-manager_ for this.
@@ -244,6 +246,32 @@ To de-attach the KISS interface we need to kill the process:
 $ sudo kill $(pgrep kissattach)
 ~~~
 
+### APRS with Xastir
+
+Find the TNC4:
+
+~~~console
+$ hcitool scan
+Scanning ...
+	34:81:F4:AA:89:4F	TNC4 Mobilinkd
+~~~
+
+Create the serial port:
+
+~~~console
+$ sudo rfcomm bind 0 34:81:F4:AA:89:4F
+~~~
+
+We use `/dev/rfcomm0` in Xastir.
+
+![Xastir Serial TNC settings](xastir-aprs.png)
+
+To disconnect the device:
+
+~~~console
+$ sudo rfcomm release 0
+~~~
+
 ## SignaLink USB
 
 I haven't used this now for a while, but I wanted to include this in this list,