Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, an RYLR998 LoRa module, an LCD 20x4 I2C display, an RFID-RC522 module, and multiple pushbuttons. The circuit is designed to interface these components with the Arduino UNO, allowing for various input and output operations.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

RYLR998

• Description: A LoRa module for long-range communication.
• Pins: 3.3V, RST, RX, TX, GND

LCD 20x4 I2C

• Description: A 20x4 character LCD display with I2C interface.
• Pins: GND, 5V, SCA, SCL

RFID-RC522

• Description: An RFID module for reading and writing RFID tags.
• Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

Pushbutton

• Description: A simple pushbutton switch.
• Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

Wiring Details

Arduino UNO

• 3.3V: Connected to 3.3V pin of RYLR998 and VCC (3.3V) pin of RFID-RC522.
• 5V: Connected to 5V pin of LCD 20x4 I2C.
• GND: Connected to GND pin of LCD 20x4 I2C, GND pin of RFID-RC522, and GND pin of RYLR998.
• A4: Connected to SCA pin of LCD 20x4 I2C.
• A5: Connected to SCL pin of LCD 20x4 I2C.
• D0: Connected to Pin 4 (out) of a pushbutton.
• D1: Connected to Pin 4 (out) of a pushbutton.
• D2: Connected to Pin 4 (out) of a pushbutton.
• D3: Connected to Pin 2 (in) of a pushbutton.
• D4: Connected to Pin 4 (out) of a pushbutton.
• D5: Connected to RST pin of RFID-RC522.
• D6: Connected to Pin 4 (out) of a pushbutton.
• D7: Connected to Pin 4 (out) of a pushbutton.
• D8: Connected to Pin 4 (out) of a pushbutton.
• D9: Connected to SDA pin of RFID-RC522.
• D10: Connected to TX pin of RYLR998.
• D11: Connected to RX pin of RYLR998 and MOSI pin of RFID-RC522.
• D12: Connected to MISO pin of RFID-RC522.
• D13: Connected to SCK pin of RFID-RC522.

RYLR998

• 3.3V: Connected to 3.3V pin of Arduino UNO.
• GND: Connected to GND pin of Arduino UNO.
• RX: Connected to D11 pin of Arduino UNO.
• TX: Connected to D10 pin of Arduino UNO.

LCD 20x4 I2C

• 5V: Connected to 5V pin of Arduino UNO.
• GND: Connected to GND pin of Arduino UNO.
• SCA: Connected to A4 pin of Arduino UNO.
• SCL: Connected to A5 pin of Arduino UNO.

RFID-RC522

• VCC (3.3V): Connected to 3.3V pin of Arduino UNO.
• GND: Connected to GND pin of Arduino UNO.
• RST: Connected to D5 pin of Arduino UNO.
• MISO: Connected to D12 pin of Arduino UNO.
• MOSI: Connected to D11 pin of Arduino UNO.
• SCK: Connected to D13 pin of Arduino UNO.
• SDA: Connected to D9 pin of Arduino UNO.

Pushbuttons

• Pushbutton 1:
  • Pin 4 (out): Connected to D7 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 2:
  • Pin 4 (out): Connected to D8 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 3:
  • Pin 4 (out): Connected to D6 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 4:
  • Pin 4 (out): Connected to D4 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 5:
  • Pin 2 (in): Connected to D3 pin of Arduino UNO.
  • Pin 4 (out): Connected to D2 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 6:
  • Pin 4 (out): Connected to D1 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.
• Pushbutton 7:
  • Pin 4 (out): Connected to D0 pin of Arduino UNO.
  • Pin 3 (out): Connected to Pin 1 (in) of the same pushbutton.

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

This concludes the documentation for the circuit. Each component and its connections have been detailed, and the code for the Arduino UNO has been provided.