RFID payment simulator. Created for children’s play (f.ex. Restaurant game and so on).
Parts required:
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ESP32 board (I used ESP32-D)
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OLED 128×64 I2C 0.96″
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RFID reader RC522
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buzzer (for beeeeep generating, I pulled it out from old electronic device. Could by anything similar.) with 100 Ohm resistor
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3×4 matrix keyboard
Connections layout (ESP32 on left):
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3v3 -> OLED 3v3, RFID 3v3
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GND -> OLED GND, RFID GND, BUZZER GND
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5 -> SDA RFID
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18 -> SCK RFID
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23 -> MOSI RFID
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19 -> MISO RFID
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21 -> RST RFID
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32 -> COLUMN 3 MATRIX
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33 -> COLUMN 2 MATRIX
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25 -> COLUMN 1 MATRIX
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26 -> ROW 4 MATRIX
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27 -> ROW 3 MATRIX
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14 -> ROW 2 MATRIX
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12 -> ROW 1 MATRIX
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17 -> resistor 100 Ohm to plus of Buzzer
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16 -> OLED OLED
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15 -> OLED SDA
Arduino code file can be found in my Github Account
Jakub/SP5TOF