ESP8266 Community Forum

- Mon Dec 08, 2014 9:55 am #4287 I still do not know the module number but it has an ESP-12 footprint (16-pin) but unlike the ESP-12 it has an u.fl connector and chip antenna like the ESP-07 (14-pin).
An enhanced "ESP-12" ?

- Mon Dec 15, 2014 6:16 am #4832 Is there a difference between the modules in flash size? Or do all the variants (except esp-09 which has 1MByte) have 4Mbit?

- Mon Dec 15, 2014 7:28 am #4838 I have the same module. Made by "AI-THINK", http://www.ai-thinker.com/ Sold as ESP-07.
Just in case anyone interested what's under the metal can, here it is.
Beware the GPIO4 and GPIO5 marked on the silkscreen are reversed.
Also never ever supply 3.3V to GPIO2. I burnt two of them by doing so.

Attachments

ESP-07 internals

My ESP8266 dev board https://www.tindie.com/products/Ba0sh1/ ... d-adapter/

- Mon Dec 15, 2014 11:53 am #4851 > Also never ever supply 3.3V to GPIO2. I burnt two of them by doing so.

Why that? I thought GPIO ports are 3V3 save.