HAT Raspberry Pi p/ Servos c/ 16 canais PWM por i2c - Adafruit
I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - IoT Devices & Sensors | Relay Controllers, Current Monitoring & Vibration Sensors
Raspberry Pi Tutorial Series: I2C - Waveshare Wiki
PN532 NFC HAT for Raspberry Pi I2C / SPI/UART Interface Near Field Communication Supports Various NFC/RFID Cards like MIFARE/NTAG2xx Raspberry Python/C, STM32, Arduino Code Provided: Amazon.co.uk: Computers & Accessories
Raspberry Pi SPI and I2C Tutorial - SparkFun Learn