Now I have connected Pin analog 4 (SDA ) and analog 5 (SDL) to the resepective Two wire interface for the board on the back of the 20 x 4 LCD as well as VCC and GND.
Have you got pullups for the I2C lines?
What value?
Do you have a scope?
Now I have connected Pin analog 4 (SDA ) and analog 5 (SDL) to the resepective Two wire interface for the board on the back of the 20 x 4 LCD as well as VCC and GND.
Have you got pullups for the I2C lines?
What value?
Do you have a scope?