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content/posts/configuring_aprs.md
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title = "Configuring an APRS receiver with an RTL-SDR and Direwolf"
tags = ["aprs", "amateur radio", "vhf", "direwolf"]
date = "2021-12-16"
+++
---
title: "Configuring an APRS receiver with an RTL-SDR and Direwolf"
tags: ["aprs", "amateur radio", "direwolf"]
date: "2021-12-16"
featuredimagepreview: "/aprs.jpg"
---
What is APRS? Automatic Packet Reporting System! Essentially a VHF radio sending out GPS location pings in the 2M ham band which can be seen at [aprs.fi](https://aprs.fi/). If you take a look at that link you will often see radiosondes and their reported data, weather stations as well as bunch of amateur operators transmitting data all over the world. Fascinating stuff.
![Yaesu FT3D with APRS tuned](/aprs.png)
I recently got my hands on an RTL-SDR v3 which claims much better accuracy and performance over previous models. Figured I'd give it a go receiving APRS and see what I could get. I did a bit of research and tested a few different packages but ended up settling with [Direwolf](https://github.com/wb2osz/direwolf). For those interested, I'm running this on an Ubuntu 20.04 LXC container with USB passthrough for the SDR itself.
Here is a run through of installing/configuring an APRS feeder with an SDR and Direwolf.
@ -16,7 +19,6 @@ apt-get install rtl-sdr direwolf
My `sdr.conf` file for reference with callsign and location blanked out.
```shell
root@aprs:~# cat /root/sdr.conf
ACHANNELS 1
ADEVICE null null
CHANNEL 0