ESP8266 Community Forum

- Thu Jan 01, 2015 10:55 am #6064 that's teh EX chip though, aren't they quiet a lot different - i.e. our firmware won't work at all on them?

- Thu Jan 01, 2015 3:17 pm #6078 I think the EX chips are pretty common now (I have a few ordered at different times and they are all EX ones).
If you can't find a better way to figure out how to make the 201 work, I would try to power on both and measure voltage on each pin of both chips (prepare a steady hand). The voltages might not necessarily need to be the same on both boards in order to make it work but it might give you some hints (or not).

- Sat Jan 03, 2015 12:20 pm #6182 To flash the 201 you must pull IO15 and IO0 low. CHP_EN is tied to 3.3V as usual.
To communicate after flashing keep IO15 pulled low.
I upgraded to ai-thinker V0.9.5 that's been modded with GPIO and ADC commands, works great.

- Sun Jan 04, 2015 11:00 pm #6303 Thanks for the help. Turns out I had a faulty breadboard!
Have the device booting. Baud rate pre set at 115200.
Have not tried to flash a firmware yet though.

Comes up as:

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http://goouuu.com
=================================
ready
AT


OK
AT+GMR

0019000902

OK


I assume the garbage is Chinese. I am using the Arduino serial monitor which I believe cannot display the characters correctly.
I had thought the mini antenna would have increased the signal strength but it does not appear to be any better than the 01 module.