Circuit Documentation

Summary

This document provides a detailed overview of a circuit involving an Arduino Mega 2560, an ESP32, and a CJMCU-8128 sensor. The circuit is designed to interface these components for data acquisition and communication. The Arduino Mega 2560 serves as the main microcontroller, while the ESP32 provides additional processing power and communication capabilities. The CJMCU-8128 sensor is used for environmental monitoring.

Component List

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D21/SCL, D20/SDA, D19/RX1, D18/TX1, D17 PWM/RX2, D16 PWM/TX2, D15/RX3, D14/TX3, D0 RX0, D1 TX0, D2-D13 PWM, AREF, SDA, SCL, D22-D53.

Laptop

• Description: A general-purpose laptop used for programming and monitoring the microcontrollers.
• Pins: None.

ESP32

• Description: A low-cost, low-power system on a chip (SoC) with Wi-Fi and Bluetooth capabilities.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT.

CJMCU-8128

• Description: A sensor module for environmental monitoring.
• Pins: VCC, GND, SDA, SCL, WAK, INT, RST, ADD.

AR8200 CO2 Detector

• Description: A CO2 detector for measuring carbon dioxide levels.
• Pins: None.

Comment

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

Wiring Details

Arduino Mega 2560

• 5V: Connected to VCC of CJMCU-8128.
• GND: Connected to GND of CJMCU-8128.
• D0 RX0: Connected to TX0 of ESP32.
• D1 TX0: Connected to RX0 of ESP32.
• SDA: Connected to SDA of CJMCU-8128.
• SCL: Connected to SCL of CJMCU-8128.

ESP32

• TX0: Connected to D0 RX0 of Arduino Mega 2560.
• RX0: Connected to D1 TX0 of Arduino Mega 2560.

CJMCU-8128

• VCC: Connected to 5V of Arduino Mega 2560.
• GND: Connected to GND of Arduino Mega 2560.
• SDA: Connected to SDA of Arduino Mega 2560.
• SCL: Connected to SCL of Arduino Mega 2560.

Documented Code

Arduino Mega 2560 Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including the components used, their wiring details, and the code running on the Arduino Mega 2560.