ESP8266 Community Forum

Posted: **Wed Jun 17, 2015 5:51 am**

Hi all,

I have doubts about ESP12E module - whether there are additional pins exist

Does anyone have a circuit diagram ESP12E ?
(ESP12 scheme'm also interested in)

Mariusz

Posted: **Wed Jun 17, 2015 6:04 am**

I have an esp12e
http://www.aliexpress.com/item/-/32245681016.html
So far it performs exactly like an esp-12.
It does have extra pads as the pictures show, but I do not plan to use these any time soon. I hoped for better performance...

Posted: **Wed Jun 17, 2015 6:14 am**

I have both modules , but I still do not know if these ESP12E extra pins are not fiction

Posted: **Wed Jun 17, 2015 9:31 am**

@mariuszb, we do not want you to worry so much! I will look.

While soldering pins to the chip the metal cover popped off so I can check inside.

Turn on the DMM to Continuity...
Pad names as printed on the module.
Pin names from 0A-ESP8266__WiFi_Specifications__EN_v4.2.pdf.
Counting pins from the dot (#1) going CCW.

Code: Select all

Pad MTDO -> pin 20 SD_CMD
Pad MTDI -> pin 22 SD_DATA_0
Pad SD_3 -> pin 19 SD_DATA_3
Pad MTMS -> pin 21 SD_CLK
Pad MTCK -> pin 23 SD_DATA_1
Pad SD_2 -> pin 18 SD_DATA_2

So these are not in agreement with what the silkscreen on the module says?
The silkscreen also marks GPIO4 and 5 in reverse to what the doco says...
Which one is correct?

Good night.

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