emonPi - no Wifi networks visible after scan

markb · 2023-03-31T09:34:05.699Z

Hello,

I have an emonPi which was working fine with a wired network connection, but now I need to move it on to the Wifi. When I hit ‘Scan’ it briefly displays ‘Scanning for networks…’ but disappears after a couple of seconds and no networks appear. The emonPi is very close to an access point and I successfully used the Wifi when I first got it. I believe it’s running the latest version of emoncms.

Screenshot 2023-03-31 at 08.45.251122×748 51 KB

JWitd · 2023-03-31T10:11:55.082Z

Check to see if wifi is disabled in /boot/config.txt

If you have either/all:
dtoverlay=disable-wifi
dtoverlay=pi3-disable-wifi

Comment them out and reboot.

markb · 2023-04-09T19:58:45.765Z

Hi Jon,

Thanks for the suggestion. Unfortunately neither of those two lines are present in config.txt.

It doesn’t look like the Wifi adapter is being detected by the system:

image1150×612 147 KB

Mark

JWitd · 2023-04-11T19:14:44.749Z

Ahh, shame that wasn’t the case.
I have the same problem on a rasberry pi 3 myself, I think the built in wifi was somehow damaged.
The only solution I found was to use a usb wifi dongle, not a perfect solution but at least they are pretty cheap and works well.

Jon

borpin · 2023-04-12T15:30:56.428Z

@glyn.hudson

glyn.hudson · 2023-04-12T18:14:24.689Z

Can you provide some more details on your setup? When was the emonPi purchased? All emonPis should have onboard WiFi, external WiFi adaptors should not be required.

markb · 2023-04-13T11:46:48.750Z

It is this one: EmonPi Kit so not sure of the original purchase date.

I can’t check what version it’s running as I’m away but I’ve updated it within the last few months. I had thought that I’d used the Wifi when I first got the unit but I’m now wondering if perhaps I never have.

Mark