david_prentice:
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.
I confirm it. It communicates flawlessly on 0x3C, and it also works together with other devices I tried on the i2c bus. i2c scan finds it in a blink. The "snowflake test" works, except the odd blank lines.