ESP8266 Community Forum

- Sun Dec 13, 2015 11:45 am #36338 Which display are you working with?

Do you have a DSO, bus pirate, or other to watch communication between the ESP and display? Maybe the pull up needs to be different.

- Sun Dec 13, 2015 12:02 pm #36340 I am using this display...

https://www.adafruit.com/products/1269

And it works just fine on the uMite. I will try a few different resistors just to check though.

Unfortunately my scope is at work. I tried the oled display using Mikes code and it works fine, so I can only assume at this point without the scope that the I2C is working. I will keep playing...


Tried different resistors from 1.5k to 10k. No change. Will keep trying code things...

- Sun Dec 13, 2015 1:46 pm #36346 I've been trying this on a esp-01 using GPIO0 as SDA and GPIO2 as SCL without luck. I would like to try my nodeMCU board, but am not sure which pins to use. GPIO 0 is shown as pin D3 and GPIO 2 is shown as D4. Is this correct?

- Sun Dec 13, 2015 1:49 pm #36347

I've been trying this on a esp-01 using GPIO0 as SDA and GPIO2 as SCL without luck. I would like to try my nodeMCU board, but am not sure which pins to use. GPIO 0 is shown as pin D3 and GPIO 2 is shown as D4. Is this correct?

correct