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