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Post by rs4427fs on Aug 24, 2015 11:10:05 GMT -7
I am running a DV Mega board on a RPi B+ as a hotspot. It works great most of the time but it occasionally just quits. It won't connect, disconnect, SYSINFO or SHUTDOWN. I can unplug it and it usually will boot (had to re-flash the sd card once) when plugged back in. There seems to be no pattern to when it goes down. Because I Listen to a quiet reflector I do not know when it goes down just that it doesn't work when I try to use it.
Any help would be appreciated.
Bob
W7IRY
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Gary
New Member
Posts: 20 
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Post by Gary on Aug 24, 2015 13:38:16 GMT -7
I wonder if the power supply you are using is man enough to run the RPI and the DV Mega board? I had similar issues running from a fairly small 'Power monkey' battery bank.
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Post by rs4427fs on Aug 25, 2015 7:46:02 GMT -7
Gary, thanks for the reply. I failed to mention the red RPi light never goes out, the Megaboard just starts failing to take commands.
On the DStar Raspberry Pi net the other night others mentioned the power supply. It is a 2 amp wall wort. My understanding is the RPi by itself only draws about 325ma with the WiFi active. I am not sure about the DVMega. I have other 5V power supplies I can try.
Thanks
Bob
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Post by W6KD on Aug 26, 2015 8:41:40 GMT -7
To troubleshoot it properly, you need to try to connect to the RasPi via VNC (or SSH) to see if the problem lies with the dvMega, the ircddbGateway/DStarRepeater program shutting down (possibly due to internet issues), or the RasPi itself locking up. Each has different causes and cures, and without knowing more detail about what's happening, it's going to be very hit and miss trying to solve the problem. A look at the log files in /var/log may be telling.
Easiest way to troubleshoot power supply issues is to measure the voltage across the test points on the RasPi and make sure you have no less than 4.75v there. If the voltage is bad, then either your power supply is not holding a stable voltage under load, you have a bad USB cable (quite common) or the polyfuse in the power input is starting to clamp due to abnormally high current.
Last, if the RasPi is not locked up, it's a much better idea to VNC/SSH into the Pi and shut it down with the linux command (sudo halt) prior to depowering it. Pulling the power cord while linux is running is a good way to scramble the SD card.
Regards
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