ESP8266 Community Forum

- Thu Sep 15, 2016 10:40 am #55169 Hi. Thanks for the info.

Just did some research, here is what i found: (mainly about form factor)

http://sherry-aithinker.blogspot.co.at/ ... y-sgs.html

There are altogether 16 pin counts, The external size of the ESP-12S WiFi module is 24mm*16mm*3mm.

http://electrodragon.com/product/esp-12 ... e-esp8266/

* Based on ESP8266 wifi IC
* Fully compatible with forepast versions ESP-12E, or ESP12F
* FCC & CE & RoHS all passed
* Further improved antenna design, better signal performance

Note: They sell the ESP-12S for only $2.40! (This is even cheaper then a lot of 10 at aliexpress right now)

http://tronixlabs.com.au/esp8266/esp826 ... australia/

This has an improved PCB layout and offers better radio performance over the ESP-12F.
Note that the ESP12S doesn't have the SPI pins at the bottom of the board (see the pinout below). You can use these with our SMD adaptor boards.

--
Conclusion:
I might look like a smaller(width) ESP-12 but it's exactly the same as the ESP-12. It has the same physical dimensions and pinout. The breakout pads of the module are now smaller (no more holes, just castellations). This led to a bigger(width) metal housing which probably causes the illusion of a smaller module.


PS: Just saw that they also improved the ESP-07 (ESP-07S).
http://sherry-aithinker.blogspot.co.at/

- Thu Sep 15, 2016 5:45 pm #55191 I just got my 12S the mail... You're right, they are the same size, it is just an illusion. I think it is a tad harder to hand solder. It otherwise seems to work the same. It might be my imagination, but the blue LED seems a little different somehow, like smoother looking in operation.

The ESP-7S is a neat looking module if you need the antenna.

- Thu Sep 15, 2016 6:30 pm #55194 Is it really smaller? It would seem odd for them to change the size. My thought is that the can is bigger and taking up the difference in space. I would hate for it to be a different size as I have boards designed with the ESP-12(E) footprint.

- Fri Sep 16, 2016 1:47 am #55207 It's the same size. It fit my development board designed for the 12F just fine.