ESP8266 Community Forum

Dear reader,

first of all hi! my name is Koen (koelie) i'm tinkering with the ESP-8266 modules. i have a friend in china so i can buy the chips directly from taobao and the AI-thinker store.
when browsing that one today i found a few new boards:
ESP-12E (e=extended?)
it now has 22 pins and the following extra pins:
CSO,MISO,GPIO9,GPIO10,MOSI,SCLK.
if you look at the fourth picture you see that GPIO9 & GPIO10 are only available in the D version. (cant find that one)
link: http://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-5350375195.75.cy7Oqa&id=44631698743
ESP-13
Completely new design
http://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-5350375195.78.cy7Oqa&id=44610003817
ESP-WROOM-02
dont know a thing about this version, it looks like the ESP-13 module. written special client only.
http://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-5350375195.81.cy7Oqa&id=44643718657

GPIO9 and GPIO10 are shared with the SPI DATA_2 and DATA_3 lines. They would only be available as GPIO when the SPI flash is configured to use Dual channel mode instead of Quad channel mode (ESP-12-D must use dual channel flash then?).

The other new pins are just the Data In/Out/Clock and spare (?) chip select lines connected to the onboard SPI flash.

Espressif posted some code examples on their forum on how to multiplex both SPI and HSPI through the same pins. This gives you the standard HSPI pins to use for GPIO but at the expense of HSPI being interrupted/locked out when SPI flash is being accessed.

So the ESP-12-E basically brings out more of the chips pins for you to connect to, but in this case, the additional pins probably don't make much of a difference for most people.

ESP-13 is exactly the same as a standard ESP-12 but with 2 additional GND pins, and it uses 1.5mm pin spacing.

Thanks for keeping us up to date on the new modules though Not sure if we'll see many more variations that aren't just different physical size now.

ESP-12E also seems to solve these issues
EMC switching issueshttp://www.esp8266.com/viewtopic.php?f=13&t=1924

see:


i will get them within a week or two and test this

Koelie2 wrote:Dear reader,

first of all hi! my name is Koen (koelie) i'm tinkering with the ESP-8266 modules. i have a friend in china so i can buy the chips directly from taobao and the AI-thinker store.

I have a friend in China too - he's called Ali.

Aliexpress. He sends me stuff really cheap all the time. Like ESP-12E boards for $2.45 ea.

The WROOM is an FCC-approved ESP-12, by the looks of it: https://download.cnx-software.com/publi ... fb15db04ca