CC3200: Channels 12&13 are not working stable, discovering in 20% of cases.

Hi,

A few questions:
- Do you have set country code to EU?
- In case of disabling BLE module you are able discovery networks at channels 12 and 13?

Design device with WiFi and Bluetooth is a challenge. In case of non proper RF design, there can be interferences between WiFi and BLE.

Jan

HI,

Thanks for prompt reply.

Here is answers as well:

- Yes, we have set country code to EU.

- By disabling BLE there is nothing changes in WI-FI behavior .

In other hand we're using BLE to scan wi-fi networks using IOS/Android .

In other hand Ring doorbell have cc3200/cc3220 and have the same issue, so that's mentioned in their official FAQ. https://support.ring.com/hc/en-us/articles/218144403-In-app-Setup-Failing-Due-to-Router-or-Modem-Issues

Hi,

This behaviour not make me sense. Country code set to US could be a good explanation. Can you recheck this? What ServicePack version do you use? I am from Czech Republic and I did not seen similar kind of issue with CC3200. Maybe some problem with RF design (wrong antenna, wrong filter) can explain this behaviour, but I think this is unlikely.

I think you should to use radio tools and check TX power and sensitivity of 12, 13ch in comparison with another channels.

Maybe TI guys will have other idea.

Update: I tested network scan with channels 12+13 with CC3220SF LaunchPad with my Ubiquiti AP and all worked properly.

Jan