what do you mean by "software I2C"?
This should help: http://www.espruino.com/I2C
Software I2C (vs hardware) can apply internal pull-up resistors so doesn't need external ones
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
This should help: http://www.espruino.com/I2C
Software I2C (vs hardware) can apply internal pull-up resistors so doesn't need external ones