[OZAPRS] How to make a raspberry pi satgate for the ISS

Sun Nov 19 12:17:58 AEDT 2017

Refresh often 

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From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of vk4tec at tech-software.net
Sent: Sunday, 19 November 2017 11:14 AM
To: 'Australian APRS Users' <ozaprs at aprs.net.au>
Subject: Re: [OZAPRS] How to make a raspberry pi satgate for the ISS

Work in progress 

The script is changing 

Testing now

From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Mark Jessop
Sent: Sunday, 19 November 2017 11:12 AM
To: Australian APRS Users <ozaprs at aprs.net.au <mailto:ozaprs at aprs.net.au> >
Subject: Re: [OZAPRS] How to make a raspberry pi satgate for the ISS

OK, a few points:

- You can't run what you have linked as a script, it has numerous syntax errors and will break. It's a guide.

- Why are you compiling the rtl_sdr utils from source (and not even the actual mainline repository, which is at [1]), only to over-write it with the version in the raspbian repository later on in the 'script'? If the aim of compiling from source is to obtain the latest bias-tee additions, then neither of these will work. If you're going to compile from source, compile from the mainline repository please. The rtl-sdr package in Raspbian Stretch is out of date, and won't be much help either.

- If you follow the rtl-sdr compilation instructions at [2], it uses a build flag which makes all the module blacklisting steps further down the guide irrelevant. 

- You are missing dependencies for direwolf (mainly libasound2-dev). How about just linking to the 'official' direwolf install guide at [3], which covers installation of direwolf on a Raspberry Pi pretty thoroughly. 

- The 'make install-rpi' line for direwolf bombs out on a headless Raspbian install, as the ~/Desktop directory does not exist. If you mkdir ~/Desktop and then run 'make install-rpi' it works.

- I don't know what you're trying to achieve with all the copy/move lines. Just edit ~/sdr.conf directly (as the 'pi' user, not as root!!!!!).

- At the end, your script goes and runs direwolf, without information about how to start it up automatically (which would be useful for an igate!). Once again, the official documentation [3] (page 28) has information on how to set this up, as does [2].

Realistically the existing direwolf APRS+SDR guide [2] contains all the instructions needed to set up a SDR iGate. The only difference is the receive frequency. Why not just link to that instead? 

73

Mark VK5QI

[1] git://git.osmocom.org/rtl-sdr.git <http://git.osmocom.org/rtl-sdr.git> 

[2] https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-SDR-IGate.pdf

[3] https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-APRS.pdf

On Sun, Nov 19, 2017 at 10:35 AM, <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net> > wrote:

Hello

I have made a script to install and make a raspberry pi satgate for the space station.

Raspberry pi, rtl dongle and antenna are required 

http://tech-software.net/satgate/satgate.htm

Andrew VK4TEC

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