Search found 8 matches

by DreeOlee
Tue Jan 16, 2018 5:57 am
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

Re: FCC problem - Spectrum analyzer shows unwanted transmission when startup

I did a full flash erase, after that, the problem was gone. So I think the problem is in the API (not accessible software for me) Only if my perspective is well approached, of course. For my understanding, is this the correct architecture? --------------- User application --------------- SDK -------...
by DreeOlee
Tue Jan 16, 2018 12:24 am
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

Re: FCC problem - Spectrum analyzer shows unwanted transmission when startup

Just flashed the latest esp_init_data_default.bin but without success.

Is there anyone who can reproduce this problem ?
by DreeOlee
Fri Jan 12, 2018 10:47 pm
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

Re: FCC problem - Spectrum analyzer shows unwanted transmission when startup

In the user_init. Tried also in the user_rf_pre_init without result. The problem occurs before the user_rf_pre_init. I commented everything out in the user_rf_pre_init, user_init and the init_done. Strange btw is that after this, I got more debug info on my serial line :D ets Jan 8 2013,rst cause:2,...
by DreeOlee
Fri Jan 12, 2018 5:12 pm
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

Re: FCC problem - Spectrum analyzer shows unwanted transmission when startup

Yes I also tried that. In fact, that was our original problem. We made a change in the API and now we had full control over the ESP. But still the problem appears with switching the device on. It happens only at startup. Just a fraction of time, after that there is no problem. The time is that short...
by DreeOlee
Thu Jan 11, 2018 8:32 pm
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

Re: FCC problem - Spectrum analyzer shows unwanted transmission when startup

I just downloaded the ESP8266_FCC_26m_20170731.bin file, and the result is exactly the same. Directly at power-up and just ones.
by DreeOlee
Wed Jan 10, 2018 9:31 pm
Forum: ESP8266 HDK
Topic: FCC problem - Spectrum analyzer shows unwanted transmission when startup
Replies: 12
Views: 2098

FCC problem - Spectrum analyzer shows unwanted transmission when startup

Hello everyone, This is my first post at this Forum. Hopefully someone can help/support me with this urgent issue. The problem is that the module shows a lot of unwanted transmissions during start-up, causing the FCC certification to fail. Analyzer_Screenshot_Startup_ESP8266.png As the attachment sh...

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