In this lesson, we will show how to use the OSOYOO IoT Kit to build an RFID access control system. Before starting this lesson, you can get more information about the RFID module from this link.
First, plug the OSOYOO MEGA-IoT Extension Board into the MEGA2560 board:
Build the circuit as shown below:
RFID Module – RFID Port
Push Button – D3 port
LED Module – D2
Door Servo – D11
Check that the wiring is correct by verifying the VCC and GND pin labels.
Prerequisite:
If you haven’t installed the WifiESP, I2C LCD, and PWMServo libraries in previous lessons, please download them from the following links:
Step ii) After completing the above operations, connect the OSOYOO MEGA2560 Board to your PC with a USB cable.
Notice: Turn off your battery or unplug your power adapter before uploading a sketch to the Arduino.
Step iii) In Arduino IDE, choose the correct board type and port for your project.
Step iv) In Arduino IDE, click File > Open, choose the code in the folder, and load the servo_config.ino sketch onto your Arduino.
Upload the sketch to the board. Wait until you see:
Done uploading
Step v) After uploading the code, the servo will turn to the 0-degree position. Now install the wooden gear and the white fixed arm:
Step vi) Press the button to simulate opening the door; release it to simulate closing the door.
After the servo test and installation are complete, you can move on to the next task. If the door does not open or close properly, adjust the servo arm starting position accordingly.
After completing the above steps and uploading the code, open the Arduino IDE Serial Monitor to find your RFID card number.
To do this, take a white or blue RFID card and tap it against the RFID sensor. You will see something like this:
RFID START!Find the card!Card type: UnknownThe card's number is : 71ba2f2eca
71ba2f2eca ID is unknown.
In the example above, 71ba2f2eca is your RFID card number. Now in line 15 of the code, change the variable marystr from 33cd216fb to 71ba2f2eca:
String marystr="33cd216fb"; //change 33cd216fb with your test ID card
After the change, line 15 will look like this:
String marystr="71ba2f2eca";
You can add or change card information at any time. When done, re-upload the code to the Arduino to continue the experiment.
Step 2: Make sure your cell phone is on the same local network as the Arduino. Open the app, tap Settings, and enter the Arduino IP address from Step 3 above and set the Port to 8888:
Now tap the test RFID card against the RFID sensor. The door will open for 1 second and then close. The app will show “Mary at the Door.”
If you press the F8 key in the app, you can also open the door manually. The app will show “Door is open by APP.”
You can also push the button to open the door.
Each time the door opens, the LED turns on. When the door closes, the LED turns off.
