# Wifi interface on raspberrypi zerow stopped working

**URL:** <https://forum.core-electronics.com.au/t/wifi-interface-on-raspberrypi-zerow-stopped-working/8475>\
**Category:** Raspberry Pi\
**Created:** [29 September 2020 22:26 UTC](https://forum.core-electronics.com.au/t/wifi-interface-on-raspberrypi-zerow-stopped-working/8475 "2020-09-29T22:26:14Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Oliver](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/oliver/32/3315_2.png) [@Oliver](https://forum.core-electronics.com.au/u/Oliver)\
**Post date:** [30 September 2020 00:30 UTC](https://forum.core-electronics.com.au/t/wifi-interface-on-raspberrypi-zerow-stopped-working/8475/2 "2020-09-30T00:30:31Z")

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Hi Adam,

Definitely sounds like a hardware issue. I know we’ve organised for a replacement but now it’s just out of interest to see if it is possible to get this working at all - and this info will help others in future!

First step with this kind of fault is to run: `ifconfig -a` and `lsmod`

Also try:  
`wpa_cli -i wlan0 terminate`  
`wpa_supplicant -c /home/pi/r/test.conf -i wlan0`  
This will show any specific errors.

It’s worth inspecting the Wifi chip (CYW43438 - it’s the shiny one) for any signs of physical damage. I’ve seen some with almost microcscopic nicks that caused Wifi failure:

 ![WIN_20200930_10_24_46_Pro](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/8/88721cfee56420c86c58cb1c760160aa407ebbdb.jpeg)

There’s also a good post on the Raspberry Pi forums here: [https://www.raspberrypi.org/forums/viewtopic.php?p=1208983#p1208983](https://www.raspberrypi.org/forums/viewtopic.php?p=1208983#p1208983)

Let us know if you ever do get this working!

Regards,  
Oliver  
Support | Core Electronics

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