When connecting multiple I2C devices/slaves to the Arduino do I need pull-up resistors at each slave or is one set of pull-up resistors enough. When I look a different examples I see both setups. [image] and [image]

pull-up resistors for the I2C connection

retrolefty October 31, 2012, 11:42pm 2

One single set of pull-ups are what is called for.

Lefty