ESP8266 Community Forum

- Thu Feb 19, 2015 12:30 pm #10159 Ok newbie about to pull hair out, ( what's left ). Cannot get to talk to 8266-12.... have ebay USB to serial link set to 3.3. Rx/Tx crossed. GPIO-0 grounded,... and xtcomUtil.exe fails to connect to 8266.
Have also tried simple PuTTy conection,.. with GPIO-0 floating,.. and still no comms,.. have tried various baud rates,.. but nothing seems to display,. or be acknowledged,.. the only glimmer of hope I have is that when I reset to the USB serial comms board,.. the Putty comms terminal shows some gobbly-gook,... as though baud rate was wrong,.. but changing the device baud rate seems to make no difference,.. where am I going wrong,... RED LED power light works,. Blu reset light flashes during power on,..
Any ideas...

- Fri Feb 20, 2015 5:28 am #10212 Well have made some progress,.... I appear to be able to program the 8266-12!!!
The secret was to make the appropriate pull-ups and Gnd connections. See attachment or link..

http://pietrushnic.github.io/blog/2015/ ... toolchain/

Ok so now I appear to be able to program the 8266-12,.. but I still cannot talk to it!!,.. I have tried numerous combinations of puTTy settings,.. but to no avail, this is born out as if I upload the lua environment and try to run code,.. no communication appears to happen,.. well certainly no response back...

Any thoughts, ideas
Tx

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- Fri Feb 20, 2015 5:31 pm #10285 Think I may have got to the bottom of my troubles,.....

it would seem for normal running of an ESP8266-12 module GPIO15 must also be held at ground....

Hopes this helps someone else,...

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- Sun Feb 22, 2015 12:33 am #10387 I've been fighting this for two days - pulling my hair out.
I finally went back to using a -01 but I really needed the ADC.
I Read this post, hooked the -12 back up with gpio15 grounded-and it works solid now!

I had tried searching the forums for things like comm errors or problems but didn't find this except by just reading through various posts.

What a relief, thanks for posting your solution. :