ESP8266 Community Forum

I will keep you posted on developments, I already have the serial interface fired up and working, ESP receives some data and responds to a given serial command . Not the method I wanted to use but works for my purposes.

Dans

First of all Dans, thanks for your brilliant work. Sadly, it does not work for me. I connected as shown (ESP-01) and loaded the code using the Arduino IDE (1.6.4). It loads with the error " warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]" repeated multiple times and nothing happens when I return the ESP to regular mode (GPIO0 connected to SCL instead of GND).

I can run an LCD test program on the LCD with an Arduino UNO and it runs fine, yet it does nothing with the ESP. I open the serial before booting up the ESP and get a string of garbage for a second or so, then nothing. Any clues?

Hi Rarbolay,

The warnings in the IDE are normal so don't worry about these.
Swap your I2c pins around the other way SDA of the display connects to GPIO-0

//Wire.pins(int sda, int scl), etc
Wire.pins(0, 2); //on ESP-01.

The garbage on boot is normal old ESP8266 boot up message, RS232 should be set to 115200 baud rate.

Hope this helps, keep me posted.

Dans

Thanks Dans. It took so long to approve my post that I got it to work, sort of. I have random pixels now. I swapped the ESP-01 and it started working ( serial messages all good, connects to my network) just get random pixels in the screen.