Differences

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--- rtl_sdr_aprs_igate [2023/02/21 21:47] – 2e0sip
+++ rtl_sdr_aprs_igate [2023/02/22 21:24] (current) – 2e0sip
@@ Line 1: / Line 1: @@
 ====== Creating an APRS iGate with an RTL-SDR and Dire Wolf ======
+**This is not finished yet, don't use!**
 It's possible to create an APRS iGate using a relatively cheap RTL-SDR "dongle". As is common with SDRs they don't perform quite as well as a real radio, but they're a versatile tool that's worth having in the shack.
@@ Line 9: / Line 11: @@
 ===== Installation =====
+Install the required packages:
-sudo apt-get install direwolf rtl-sdr
+  sudo apt-get install direwolf rtl-sdr
+Create a directory for the logs:
+  sudo mkdir /var/log/direwolf
 ===== Configuration =====
-vim /lib/systemd/system/direwolf.service
+When using Dire Wolf with an rtl-sdr it's necessary to edit the systemd service to ensure rtl_fm runs and redirect Direwolfs output into journald.
+Open /lib/systemd/system/direwolf.service in your favourite text editor and replace it with the following:
 <code>
@@ Line 25: / Line 32: @@
 [Service]
-#User=direwolf
 SupplementaryGroups=dialout audio
 ExecStart=/bin/sh -c '/usr/bin/rtl_fm -f 144.8M - | /usr/bin/direwolf -c direwolf.conf -t 0 -r 24000 -D 1 -'
@@ Line 34: / Line 40: @@
 [Install]
 WantedBy=multi-user.target
+</code>
+Reload systemd, enable and start Dire Wolf
+<code>
+systemctl daemon-reload
+systemctl enable direwolf
+systemctl start direwolf
 </code>
 ===== Usage =====
-rtl_fm -f 144.8M - | direwolf -c direwolf.conf -r 24000 -D 1 -
+Starting manually:
+  rtl_fm -f 144.8M - | direwolf -c direwolf.conf -r 24000 -D 1 -
-journalctl -f -u direwolf
+View Dire Wolfs stdout:
+  journalctl -f -u direwolf
+{{tag>[rtl-sdr]}}