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Hugo
United Kingdom
12 Posts |
 Posted - 03/28/2022 : 07:23:46
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As of today my GMC-500+ refuses to connect to my WiFi and I'm at a loss as to why. I've tried to connect to either of local access point or main router with equal lack of success. Using the AT+CWLAP command via the GMC DataViewer terminal I can see my WiFi networks - but no luck connecting. Sometimes I get the message 'WiFi Module Error' and sometimes I just get 'Failed' message.
I've reset the WiFi module and even factory reset the GMC 500+ - I've spent hours on this now with no success  - please help! |
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| Reply #1
EmfDev
1693 Posts |
Posted - 03/28/2022 : 09:49:20
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Hi Hugo, if WiFi Module Error, you need to restart the device by powering off completely.
If Failed, check if the parameters are correct, mainly SSID and password. They are case sensitive. |
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| Reply #2
Hugo
United Kingdom
12 Posts |
Posted - 03/28/2022 : 11:41:40
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Thanks for response. All the parameters are correct and haven't changed from when it was connecting. I've used AT commands and have got the WiFi module to establish a connection but when using the WiFi on/off menu the GMC500+ it simply won't connect. The commands I used direct to the module were:
- AT+CWQAP (make sure disconnected)
- AT+CWJAP_DEF ="BT-JRA5XH","<password>" (connect)
- AT+CIPSTA_CUR? (to get IP address)
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Edited by - Hugo on 03/28/2022 12:54:22 |
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| Reply #3
Hugo
United Kingdom
12 Posts |
Posted - 03/28/2022 : 12:07:53
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When using the terminal I quite often see some 'noise' characters (see image), I don't know if that indicates a more general problem with the device or it is nothing to be concerned about?
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Edited by - Hugo on 03/28/2022 12:10:05 |
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| Reply #4
EmfDev
1693 Posts |
Posted - 03/28/2022 : 15:01:25
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| That may be the reason why it fails when using the Connect WiFi on the device. But can you try more times until it is connected? Also before trying, can you send this AT+CWMODE=3 if it doesn't work, try AT+CWMODE=1 |
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| Reply #5
Hugo
United Kingdom
12 Posts |
Posted - 03/29/2022 : 01:01:54
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quote:
Originally posted by EmfDev
That may be the reason why it fails when using the Connect WiFi on the device. But can you try more times until it is connected? Also before trying, can you send this AT+CWMODE=3 if it doesn't work, try AT+CWMODE=1
The AT+CWMODE=3 seems to have worked - thanks! 
Any thoughts on what happened and why I had to make the change? I'm still a bit concerned about that spurious data on the serial connection as well - thoughts? |
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| Reply #6
Hugo
United Kingdom
12 Posts |
Posted - 03/29/2022 : 05:16:42
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Update! It worked ok for about an hour or so but it is now behaving much the same ie failing to connect and send the data to the server, so I think establishing the connection ok after the change was just luck.
I tried again using the AT command and the response is in the image below. It looks to me like there's a hardware issue because the response should be 'OK GOT IP' but as you can see it is quite corrupted.
'Server/Test Connection' produces random success/fail and I get lots of 'WiFi data send failed' messages |
Edited by - Hugo on 03/29/2022 05:38:56 |
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| Reply #7
ullix
Germany
754 Posts |
Posted - 03/29/2022 : 05:56:27
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Almost looks like a comport mis-configuration. Just because it is so strange - can you verify on both the counter and the computer side?
GeigerLog has a GLsermon.py script (see gtools directory) with a mode specific for GMC counter. As last resort perhaps worth a try? |
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| Reply #8
Hugo
United Kingdom
12 Posts |
Posted - 03/29/2022 : 08:56:17
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quote:
Originally posted by ullix
Almost looks like a comport mis-configuration. Just because it is so strange - can you verify on both the counter and the computer side?
GeigerLog has a GLsermon.py script (see gtools directory) with a mode specific for GMC counter. As last resort perhaps worth a try?
Thanks for suggestion but I don't think it is a com port mis-config all the GQ commands seem to work ok (I can run GETVER as many times as you like without seeing any corrupt response), I think it's the pass through/from the WiFi module that's the issue?
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Edited by - Hugo on 03/29/2022 08:57:20 |
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| Reply #9
EmfDev
1693 Posts |
Posted - 03/29/2022 : 10:16:04
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| Have you tried AT+RST? If you soldering iron, you can check if the soldering is still ok. It may be just noise from surrounding components. And when did you buy this device? |
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| Reply #10
Hugo
United Kingdom
12 Posts |
Posted - 03/29/2022 : 12:34:57
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quote:
Originally posted by EmfDev
Have you tried AT+RST? If you soldering iron, you can check if the soldering is still ok. It may be just noise from surrounding components. And when did you buy this device?
I purchased it this year on Feb 26th and it was delivered March 2nd.
As an update, I took the battery out and opened the case to have a look at solder joints etc. Didn't do anything but put the case back on and put the battery back in. Now it is working fine and I don't see any corruption on the serial connection!!!!! Sounds like a dry joint or something to me!?!?!
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| Reply #11
EmfDev
1693 Posts |
Posted - 03/30/2022 : 09:54:10
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| Hopefully it wont last for only 1 hour and will be permanent. |
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| Reply #12
Hugo
United Kingdom
12 Posts |
Posted - 03/31/2022 : 01:45:44
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quote:
Originally posted by EmfDev
Hopefully it wont last for only 1 hour and will be permanent.
It's been solid for about 36hours now |
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Topic |
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GMC-500+ - Won't connect to WiFi anymore
