ESP8266 Community Forum

- Fri May 08, 2015 1:38 am #16864

On the esp8266 or on the break-out-board?

0 - GPIO16
1 - GPIO5
...
12 - GPIO10

But then again, which break-out board are we talking about... I'd rather have those details not in this thread.

- Fri May 08, 2015 3:06 am #16869

On the esp8266 or on the break-out-board?
0 - GPIO16
1 - GPIO5
...
12 - GPIO10

But then again, which break-out board are we talking about... I'd rather have those details not in this thread.

This one it's not about the different Boards, it'a about how GPIO's are allocated in Firmware. Not very intuitive, I must admit

The example above is the latest list for NodeMCU firmware, hence also the link attached above, please take a look:
https://github.com/nodemcu/nodemcu-firmware

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/

- Fri May 08, 2015 3:16 am #16871 I don't understand. Each GPIO pin has a definitive identication, it's hardware. If nodemcu uses ANOTHER mapping above that, all bets are off I guess.

- Fri May 08, 2015 11:43 am #16916

I don't understand. Each GPIO pin has a definitive identication, it's hardware. If nodemcu uses ANOTHER mapping above that, all bets are off I guess.

It's just a remap in software, nothing fancy. GPIO0 remains GPIO0, etc offcourse.
But for some reasons known only by the developers of the firmware, they choose to declare and remap them like that. It's just la label, imagine them declared as I1, I2, etc...same abstract thing.
If anybody from that team is around, maybe we can obtain also a valid explanation why in that way and not another one. It's a little bit counterintuitive but...

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/