psteen:
Hello !Here is a link of what I purchased:
LED-/LCD-displayer - Optokomponenter | Kjell.com(Warning! site is in Swedish, but just click on the pictures to get them bigger)
The screen is 128x64. It is an I2C device with (7-bit) Slave Address 0x3C (8-bit=0x78)
There is no RESET pin. You have to rely on power-on reset.
It has pullups on SDA, SCL.
It looks as if it should ACK correctly. i.e. D2 is connected to SDA.
I do not have this particular board. Many other people do. They can confirm/deny my eyesight/guesswork.
So you should use a constructor for 128x64, 0x3C with no RST pin.
David.