1 Wire interface for the Raspberry Pi
1 Wire interface for the Raspberry Pi Zero
4 channel I2C Switch for the Raspberry Pi
32 channel I/O expander for the Raspberry Pi
16 channel I/O expander for the Raspberry Pi Zero
RS485 interface for the Raspberry Pi
Real-time clock for the Raspberry Pi
RS232 serial interface for the Raspberry Pi+ and Raspberry Pi 2
RS232 serial interface for the Raspberry Pi Zero