TS7-Pro 7-inch Touch Screen
(continued from previous page)
'bind': getValue
},
Pass getValue() into the 'bind' key as a callback function, so that the brightness value (the return value of the
getValue() function) can be sent to the Text widget.
Attendance system
In this project, we use MFRC522 RFID Module and Cloud4RPi to make a system, you can view the attendance
information on Cloud4RPi, or open the local .csv file to view the attendance records.
Due to the delay of network data transmission, the project only allows you to punch in when the green LED is on and
upload data when the red LED is on.
Experimental Procedures
Build the circuit.
122 Chapter 5. PROJECTS AND ACTIVITIES
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