Circuit Documentation

Summary

This circuit involves an Arduino Mega 2560 microcontroller interfaced with several peripheral modules including an Ethernet module (W5500), an RFID reader (RC522), and a touchscreen display (ST7796). The circuit is designed to leverage the capabilities of these modules for various functionalities such as network communication, RFID reading, and touch-based user interface.

Component List

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL

Module Ethernet W5500

• Description: An Ethernet module based on the W5500 chip.
• Pins: NC, INT, RST, GND, 5V, SCK, SS, MOSI, MISO, 3.3V

RFID-RC522

• Description: An RFID reader module.
• Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

ST7796 3.5ips Module Touchscreen

• Description: A 3.5-inch touchscreen display module.
• Pins: VCC, GND, LCD_CS, LCD_RST, SOI(MOSI), SCK, LED, SOO(MOSI), CTP_SCL, CTP_RST, CPT_SDA, LCD_RS, CPT_INT, SD_CS

Comment

• Description: Placeholder for comments in the circuit.
• Pins: None

Wiring Details

Arduino Mega 2560

• 3V3 connected to:

  • Module Ethernet W5500 (3.3V)
  • RFID-RC522 (VCC (3.3V))

• GND connected to:

  • ST7796 3.5ips Module Touchscreen (GND)
  • RFID-RC522 (GND)
  • Module Ethernet W5500 (GND)

• D21/SCL connected to:

  • ST7796 3.5ips Module Touchscreen (CTP_SCL)

• D20/SDA connected to:

  • ST7796 3.5ips Module Touchscreen (CPT_SDA)

• D2 PWM connected to:

  • Module Ethernet W5500 (INT)

• D3 PWM connected to:

  • Module Ethernet W5500 (RST)

• D4 PWM connected to:

  • RFID-RC522 (RST)

• D5 PWM connected to:

  • ST7796 3.5ips Module Touchscreen (CPT_INT)

• D6 PWM connected to:

  • ST7796 3.5ips Module Touchscreen (LCD_RS)

• D7 PWM connected to:

  • ST7796 3.5ips Module Touchscreen (CTP_RST)

• D8 PWM connected to:

  • ST7796 3.5ips Module Touchscreen (LCD_RST)

• D9 PWM connected to:

  • ST7796 3.5ips Module Touchscreen (LCD_CS)

• D10 PWM connected to:

  • Module Ethernet W5500 (SS)

• D52 connected to:

  • Module Ethernet W5500 (SCK)
  • ST7796 3.5ips Module Touchscreen (SCK)
  • RFID-RC522 (SCK)

• D50 connected to:

  • Module Ethernet W5500 (MISO)
  • ST7796 3.5ips Module Touchscreen (SOO(MOSI))
  • RFID-RC522 (MISO)

• 5V connected to:

  • ST7796 3.5ips Module Touchscreen (VCC)
  • ST7796 3.5ips Module Touchscreen (LED)
  • Module Ethernet W5500 (5V)

• D53 connected to:

  • RFID-RC522 (SDA)

• D51 connected to:

  • Module Ethernet W5500 (MOSI)
  • ST7796 3.5ips Module Touchscreen (SOI(MOSI))
  • RFID-RC522 (MOSI)

Module Ethernet W5500

• 3.3V connected to:

  • Arduino Mega 2560 (3V3)

• INT connected to:

  • Arduino Mega 2560 (D2 PWM)

• RST connected to:

  • Arduino Mega 2560 (D3 PWM)

• GND connected to:

  • Arduino Mega 2560 (GND)

• SCK connected to:

  • Arduino Mega 2560 (D52)
  • ST7796 3.5ips Module Touchscreen (SCK)
  • RFID-RC522 (SCK)

• SS connected to:

  • Arduino Mega 2560 (D10 PWM)

• MOSI connected to:

  • Arduino Mega 2560 (D51)
  • ST7796 3.5ips Module Touchscreen (SOI(MOSI))
  • RFID-RC522 (MOSI)

• MISO connected to:

  • Arduino Mega 2560 (D50)
  • ST7796 3.5ips Module Touchscreen (SOO(MOSI))
  • RFID-RC522 (MISO)

• 5V connected to:

  • Arduino Mega 2560 (5V)

RFID-RC522

• VCC (3.3V) connected to:

  • Arduino Mega 2560 (3V3)

• RST connected to:

  • Arduino Mega 2560 (D4 PWM)

• GND connected to:

  • Arduino Mega 2560 (GND)

• SCK connected to:

  • Arduino Mega 2560 (D52)
  • Module Ethernet W5500 (SCK)
  • ST7796 3.5ips Module Touchscreen (SCK)

• MISO connected to:

  • Arduino Mega 2560 (D50)
  • Module Ethernet W5500 (MISO)
  • ST7796 3.5ips Module Touchscreen (SOO(MOSI))

• MOSI connected to:

  • Arduino Mega 2560 (D51)
  • Module Ethernet W5500 (MOSI)
  • ST7796 3.5ips Module Touchscreen (SOI(MOSI))

• SDA connected to:

  • Arduino Mega 2560 (D53)

ST7796 3.5ips Module Touchscreen

• VCC connected to:

  • Arduino Mega 2560 (5V)

• GND connected to:

  • Arduino Mega 2560 (GND)

• LCD_CS connected to:

  • Arduino Mega 2560 (D9 PWM)

• LCD_RST connected to:

  • Arduino Mega 2560 (D8 PWM)

• SOI(MOSI) connected to:

  • Arduino Mega 2560 (D51)
  • Module Ethernet W5500 (MOSI)
  • RFID-RC522 (MOSI)

• SCK connected to:

  • Arduino Mega 2560 (D52)
  • Module Ethernet W5500 (SCK)
  • RFID-RC522 (SCK)

• LED connected to:

  • Arduino Mega 2560 (5V)

• SOO(MOSI) connected to:

  • Arduino Mega 2560 (D50)
  • Module Ethernet W5500 (MISO)
  • RFID-RC522 (MISO)

• CTP_SCL connected to:

  • Arduino Mega 2560 (D21/SCL)

• CTP_RST connected to:

  • Arduino Mega 2560 (D7 PWM)

• CPT_SDA connected to:

  • Arduino Mega 2560 (D20/SDA)

• LCD_RS connected to:

  • Arduino Mega 2560 (D6 PWM)

• CPT_INT connected to:

  • Arduino Mega 2560 (D5 PWM)

Documented Code

sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

documentation.txt