[Vk5-wx-sonde] Chasemapper pi problems.

[Liam Gunning]

Hi Paul,

I have encountered both of those problems in the past.

You can setup a static IP address on the RPi. That will enable you to have the same IP address whenever the RPi is online. Just make sure you run the same IP address subset config on each of your devices that connect the the mobile network. 

If you’re using the RTL blog SDR dongle they have a fairly high current draw. I had similar issues with my car Pi power supply. Changed to a 2.4A supply. Problem solved. I also have a ups hat on my car Pi which allows it to run off its own battery if the car power supply is interrupted.

Hope this helps

Regards,

Liam VK5LJG

-------------------------------------
Liam Gunning
liam.gunning at icloud.com

Sent from iPhone

> On 1 Apr 2021, at 13:55, Paul Roehrs via Vk5-wx-sonde <vk5-wx-sonde at vk5fo.com> wrote:
> 
> Just wondering if anyone has some simple solutions to these problems
> 
> I use a headless raspberry pi 3 for chasemapper in my vehicle wifi connected to a hotspot on a dedicated windows phone now using amysim on the Optus network.  For backup I can use my normal mobile phone on the Belong network ( a subset of the Telsta network which I have found is somewhat inferior to Optus)  I wifi connect to this setup using a windows laptop using VNC for control and Google Chrome to monitor the chasemapper output.
> 
> The problem I have is that starting the Pi which automatically connects to the hotspot quite often lead to a change in IP address since the last time it connected.  As I connect to the pi using a windows laptop I need to know the ip address of the pi.  Windows Command line instruction arp -a should list all connected IP addresses but it often does not show the pi even though it is wifi connected.  So I cannot find the ip address easily unless I connect a keyboard, monitor and mouse to my mobile pi.  This is a frequent annoyance to which I have yet to find an easy solution.
> 
> The other problem I have is that despite building a higher capacity power supply for my mobile pi and setting the output to 5.5 Volts and using the heaviest and shortest USB power lead I am still getting low voltage warnings on the pi.  I have the same problem on my home pi and this has only happened since recent Pi OS upgrades. If I use my original power supplies I get unwanted shutdowns and reboots as the undervoltage problem is even worse..
> 
> 73
> 
> Paul
> 
> VK5NE
> 
> 
> 
> 
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