Technical requirements

This chapter will require you to have the following hardware and software installed:

• Hardware:
  • ESP32
  • A key fob
  • The RFID RC522 module
  • USB cable A male to micro B male
• Software:
  • Mosquitto client.
  • Arduino IDE.
  • Command prompt (you already have this on Windows).
  • The SPI.h and MFRC522.h libraries for Arduino. You can find these libraries at https://www.arduino.cc/en/reference/SPI and https://github.com/miguelbalboa/rfid, respectively.
  • A diagramming software such as Draw.io, as described in previous chapters
  • Fritzing.

You can access the GitHub folder that contains the code for this chapter at https://github.com/PacktPublishing/IoT-Made-Easy-for-Beginners/tree/main/Chapter04/.