ESP8266 Community Forum

- Tue Jun 09, 2015 1:37 am #19899 Hello Forum,

i have two ESP8266 Boards.
Booth of them have the software version 0.9.2.4.

I have connected the boards with a FTDI breakout board to my pc.
On booting the ESP8266 Board i receive the Version Number with some other text, but iam not able to send AT commands to the ESP8266. The board isnt responding to them.

After some reading here i tried to update the software but this also didnt work.
The Log output of NODEMCU is
"Note:Serial port connected.
Note:Begin find ESP8266."
Thats all.
It looks like the rx line on the board's are damaged.
My FTDI breakout board is able to operate with different levels.
I can jumper the board to 3,3V. I checked the level with my meter. Its 3,44 V. This shouldnt be to much, arent it?

So now iam a little bit loss.
Someone any suggestions?

Thanks.

Regards
Markus

- Wed Jun 10, 2015 6:20 am #20026 Know nothing about NodeMCU as yet but the problems I had when starting were all about wiring .See the wiki in the menu band above on this page . go to ESP8266 101 and have a look at that as to how it should be wired and check yours . so easy to get it wrong and it does weird things then.

I was running my modules (3 off) for a week at 4.76 Volts before I discovered it and it did no harm so yours should be right.

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Thu Jun 11, 2015 2:49 am #20130 Thanks for your reply.
I have now double checked the wiring, should be ok.
So the wiring is not my problem ......

Any other suggestions?

Thanks.

- Thu Jun 11, 2015 7:18 am #20151 OK.
It looks like i found the problem.

Little bit embarrassing .... but the power supply was the problem.
Grrr, searched a few days for this problem.

Thanks.

Cheers Markus