Unfortunately there is no information on the internet on the configuration data needed to initialize the ICN2053 chips. @ElectronicsInFocus figured it out though and I have no clue how: Youtube. This ...

This library is to control the I2C PCA9634 PWM extender. The 8 channels are independently configurable in steps of 1/256. This allows for better than 1% fine tuning of the duty-cycle of the PWM signal ...

A small portable device featuring timer, clock, and calendar functions, equipped with a simple and functional interface and a truly long battery life.