Scanning Barcode using GM66 QR module and Arduino UNO - Python Langauge

Here's an example of a program in Arduino that scans a barcode from a card using the GM66 QR module, compares the data to a database, and opens a gate using a servo if there is a match:

This code uses the Ethernet library to connect to a server and retrieve a database file, which is assumed to be in the root directory of the server and be named "database.txt". The database file should contain a list of card data, with each piece of data on a new line. The scanCard() function is where you would include the code to scan the card and get its data. If the card data is found in the database, the openGate() function is called to open the gate by moving the servo to a certain position.

Here is a list of the hardware and model names used in the code I provided:

1. GM66 QR module: This is a barcode scanner module that is used to read QR codes.
2. Arduino Uno: This is a microcontroller board based on the ATmega328P. It is used to control the other hardware components and run the program.
3. Ethernet Shield: This is a shield that can be added to the Arduino Uno to enable it to connect to a network using an Ethernet cable. It is based on the W5100 Ethernet chip.
4. Servo: This is a type of motor that is used to control the position of a gate or other mechanical device. The code uses the Servo library to control a servo connected to the Arduino. The servo is connected to the pin 9 of the arduino uno board.

Please note that this is just an example, you may have to modify the code to suit your specific requirements and environment. Also, it is not complete program and it will not work as is. It is missing the QR scanning code, card data validation and other important functions.