ESP8266 Community Forum

- Wed Mar 15, 2017 7:48 pm #63755 Hello everyone,

I would like your assistance in my baby steps with an ESP-12s.

I am having a hard time figuring out how to properly wire these little beasts (or figuring out what other issue I might be having for that matter). Currently I have one setup as shown in the attached picture, but what happens is the blue LED on the ESP just blinks once and then stays off. If I leave it a while like that it might blink again or start blinking rapidly. During the blinking, I see that it gets restarted as it prints multiple times the prompt:

Code: Select allAi-Thinker Technology Co. Ltd.

ready

I use the Arduino as I have no other reliable 3.3V source. The USB adapter is a FTDI TTL-232R-PCB. The ESP itself is from here.

I hope I have not fried it. Any suggestions on what I might be doing wrong?

Thanks in advance!

EDIT: Here is a video of what happens: ESP-12s wiring issues

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- Wed Mar 15, 2017 9:51 pm #63766 The Arduino is not adequate for the current requirements of the ESP8266. You should have something that can supply close to 300mA or more for the peak demand. The Uno's 3.3V output is only rated for 50mA.

- Tue Mar 21, 2017 7:59 am #64048 Hello again!

I just tested with a 3.3V 1A supply and the result is unfortunately the same.

I event tested the without the USB to Serial adapter. The same blinking. I tested the USB-serial adapter itself by shorting it and the data is sent/received successfully.

At this point I am lost as to what the issue could be. If you have any other ideas, please share.

Cheers

- Tue Mar 21, 2017 8:26 am #64052 I am very confused now.

According to this "manual" I should be good to go with just attaching TX, RX, VCC and GND. Doing that I get the same behaviour.

Does this look like a damaged ESP? Could I have damaged it during the soldering?