![PN532 NFC Near Field Communication HAT for Raspberry Pi/Arduino/STM32, NFC Reader/Writer Module Support I2C/SPI/UART Three Interfaces, 13.56MHz Operating Frequency, Support Various NFC/RFID Cards : Amazon.co.uk: Computers & Accessories PN532 NFC Near Field Communication HAT for Raspberry Pi/Arduino/STM32, NFC Reader/Writer Module Support I2C/SPI/UART Three Interfaces, 13.56MHz Operating Frequency, Support Various NFC/RFID Cards : Amazon.co.uk: Computers & Accessories](https://m.media-amazon.com/images/I/71JumjbZODL.jpg)
PN532 NFC Near Field Communication HAT for Raspberry Pi/Arduino/STM32, NFC Reader/Writer Module Support I2C/SPI/UART Three Interfaces, 13.56MHz Operating Frequency, Support Various NFC/RFID Cards : Amazon.co.uk: Computers & Accessories
![Enabling and checking I2C on the Raspberry Pi using the command line for your own scripts - pi3g.com Enabling and checking I2C on the Raspberry Pi using the command line for your own scripts - pi3g.com](https://pi3g.com/wp-content/uploads/2021/05/image-8.png)
Enabling and checking I2C on the Raspberry Pi using the command line for your own scripts - pi3g.com
![i2c default clock speed for Pi Pico (RP2040) is 90.9kHz (and 400kHz is around 265kHz) · Issue #4466 · adafruit/circuitpython · GitHub i2c default clock speed for Pi Pico (RP2040) is 90.9kHz (and 400kHz is around 265kHz) · Issue #4466 · adafruit/circuitpython · GitHub](https://user-images.githubusercontent.com/6851309/112137445-2a0ac100-8bc8-11eb-9ba2-4f3307c616c7.png)