Peter_n:
The internal pullup resistors are 50k or 60k or something like that, that is useless with those wires.Every module with I2C could have pullup resistors. Try to find the schematics and calculate the total parallel pullup resistor value. A normal value would be 4k7, but you can try 2k2 (for the total parallel value).
Okay,.. It LOOKS like neither of my I2C devices include pull UP resistors, I only have a schematic for one though, and rumors on the other.
So,.. that means to end up with about 4.7K Ohm I need a resistor around 5K ohm, or for 2.2K I need about 2.3K Ohm.
And this needs to be a Pull UP resistor, right? That sounds odd to me so I just wanted to Verify. Do I pull it up to 5V?
Should I place these Resistors at the Screen on the end of the long wire? Or should I place them at the Arduino side?
Thank you,
Whiskey