ESP8266 Community Forum

- Thu Aug 23, 2018 1:59 pm #77889 Hello,

I found the following pinout from an arduino uno which shows the (I2C) SDA and (I2C) SCL pins.
https://www.electroschematics.com/wp-co ... inouts.png

I need to detect pins on my Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module from Banggood.

Do you guys know which pins are for SCL and SDA?

Any information would help me a lot!

Thank you in advance!

Best regards

- Sat Aug 25, 2018 9:10 am #77918 Following the Links in espressif nodeMCU doc
https://nodemcu.readthedocs.io/en/master/#nodemcu-documentation
I'll lead to this PDF:
https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf
not sure if its the right one.


linuxpaul

- Sat Aug 25, 2018 10:00 am #77920 I think my previous post is wrong.
This link shows D1/D2 as I2C pins which means GPIO 4/5
https://www.mikrocontroller-elektronik.de/nodemcu-esp8266-tutorial-wlan-board-arduino-ide/
This is similar to the examples found in google pictures.


linuxpaul

- Sun Sep 30, 2018 8:26 am #78443 Hi linuxpaul,

thank you very much!
This helped and I got it working!

Cheers
atix