Then install the library, sudo python setup.py install. First, enter the SPI-Py directory by typing cd SPI-Py. I clone the library by typing the command git clone. The SPI PY library is used interface with the RC522 module. This is done by entering sudo apt-get install python2.7-dev. So the first step is to install Python 2.7. The libraries we will use are written in Python 2, not Python 3. This will reboot the Raspberry Pi can finish enabling SPI. The configuration menu will say “The SPI interface is enabled.” To finish enabling SPI, open a command line terminal and enter the command sudo reboot. Select menu 5 “Interfacing Options.” Now select “P4 SPI.” When asked if you want to enable the SPI Interface, select yes. To do this, open a command line window and enter sudo raspi-config. The first step is to enable SPI on the Raspberry Pi. I’ve connected my actuator (an LED) to Pin 18 on the Raspberry Pi. The reader should be wired according the table below. SPI is a fairly common bus used in embedded systems. This simply allows the Raspberry Pi to control the solenoid, which requires more power than the Raspberry Pi’s GPIO can output.įigure 2: Circuit Schematic w/ SolenoidThe RC522 RFID module uses SPI (Serial Peripheral Interface Bus) to interface to the Raspberry Pi. The TIP120 is a Darlington Array power transistor. This is the circuit you want to implement the design as a door lock or a doggy door. The second circuit is with a solenoid as an actuator. The LED will turn on when a correct reading is made by the RFID module. The first schematic is of the circuit I am building with an LED as an actuator. You can download Fritzing using the following link (optional): I always like to make a wiring diagram (Figure 1: Circuit Schematic w/ LED) using Fritzing, an open-sources schematic capture and PCB routing software. Step-by-Step Guide to Integrating an RFID Module with Raspberry Pi I discuss how this design can be implemented as an RFID doggy door. This actuator can be a solenoid lock, a speaker, or even a web interface that logs data. I also show how to integrate an actuator, in this case an LED, to respond to a correct reading from the RFID module. In this tutorial, I go over how to integrate the RC522 RFID module with a Raspberry Pi board. The basic principles discussed lay the foundation to make an RFID doggy door. The purpose of this tutorial is show how to integrate an RFID reader and an actuator with a Raspberry Pi. Considerations if Implementing as a Doggy Door.
Step-by-Step Guide to Integrating an RFID Module with Raspberry Pi.Originally published by Table of Contents
0 kommentar(er)
