* [Ultimate Serial Port](http://www.mysticengineering.com/debug.buddy/pi.usage.html).
* [USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi ID: 954 - $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://www.adafruit.com/products/954).
* [USB MPSSE Cables](http://www.ftdichip.com/Products/Cables/RPi.htm).
+* Câmera infravermelha.
* Leitores de Smartcard/Simcard.
* Leitor de RFID.
* Leitor de senhas da BIOS dos Thinkpads.