Hello,

I have been working with a Matrix Orbial LK204-25-GW LCD and I can not get it to display anything on the display when using I2C. I have tried on serial and it works beautifly, but the second I connect it to the I2C bus and write to it, nothing happens. I disconnected all the other I2C devices, checked the addresses, checked connections, Googled it, 8082.com searched it, and I cant find a thing. The controller is an Atmel AT89S8252, and the I2C is software driven. Does anyone have any idea what could the problem be? Any trouble shooting ideas? I might also add, everything elce works on the I2C bus no problems at all. Any ideas welcome.

Thank you,

Stephan