Arduino Mega 2560-Based Environmental Monitoring System with Wi-Fi and GPS
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Circuit Documentation
Summary
This document provides a detailed overview of a circuit that includes various sensors, a microcontroller, and other components. The circuit is designed to interface with multiple sensors and modules, including an MPU-6050 accelerometer and gyroscope, a BMP280 barometric pressure sensor, a GPS module, an ESP32 CAM, and more. The central microcontroller used is an Arduino Mega 2560, which coordinates the operation of all connected components.
Component List
MPU-6050
- Description: Accelerometer and Gyroscope
- Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT
Micro Servo 9G
- Description: Small servo motor
- Pins: GND, +5V, PWM
Arduino Mega 2560
- Description: Microcontroller board based on the ATmega2560
- Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL
BMP280
- Description: Barometric pressure sensor
- Pins: VCC, GND, SCL, SDA, CSB, SDO
Micro SD Card Module
- Description: Module for interfacing with micro SD cards
- Pins: cs, sck, mosi, miso, vcc, gnd
NRF24L01
- Description: 2.4GHz wireless transceiver module
- Pins: IRQ (not used), MOSI, CSN, VCC (3V), GND, CE, SCK, MISO
MQ-2
- Description: Gas sensor
- Pins: GND, VCC, ANALOG, Digital
GPS NEO 6M
- Description: GPS module
- Pins: VCC, RX, TX, GND
ESP32 CAM
- Description: Camera module with ESP32
- Pins: 5V, GND, GPIO12, GPIO13, GPIO15, GPIO14, GPIO2, GPIO4, 3.3V, GPIO16, GPIO0, 3.3V / 5V / P_OUT, GPIO3 / RX, GPIO1 / TX
Wiring Details
MPU-6050
- VCC: Connected to Arduino Mega 2560 3V3
- GND: Connected to Arduino Mega 2560 GND
- SCL: Connected to Arduino Mega 2560 D21/SCL
- SDA: Connected to Arduino Mega 2560 D20/SDA
Micro Servo 9G
- GND: Not connected in the provided net list
- +5V: Not connected in the provided net list
- PWM: Not connected in the provided net list
Arduino Mega 2560
- 3V3: Connected to MPU-6050 VCC, NRF24L01 VCC (3V)
- 5V: Connected to BMP280 VCC, GPS NEO 6M VCC, ESP32 CAM 3.3V / 5V / P_OUT, Micro SD Card Module vcc, MQ-2 VCC
- GND: Connected to BMP280 GND, MPU-6050 GND, GPS NEO 6M GND, ESP32 CAM GND, Micro SD Card Module gnd, MQ-2 GND, NRF24L01 GND
- D21/SCL: Connected to MPU-6050 SCL, BMP280 SCL
- D20/SDA: Connected to MPU-6050 SDA, BMP280 SDA
- D52: Connected to Micro SD Card Module sck, NRF24L01 SCK
- D51: Connected to Micro SD Card Module mosi, NRF24L01 MOSI
- D50: Connected to Micro SD Card Module miso, NRF24L01 MISO
- A6: Connected to MQ-2 ANALOG
- D19/RX1: Connected to GPS NEO 6M RX
- D18/TX1: Connected to GPS NEO 6M TX
- D17 PWM/RX2: Connected to ESP32 CAM GPIO1 / TX
- D16 PWM/TX2: Connected to ESP32 CAM GPIO3 / RX
- D48: Connected to NRF24L01 CE
- D53: Connected to Micro SD Card Module cs
- D49: Connected to NRF24L01 CSN
BMP280
- VCC: Connected to Arduino Mega 2560 5V
- GND: Connected to Arduino Mega 2560 GND
- SCL: Connected to Arduino Mega 2560 D21/SCL, MPU-6050 SCL
- SDA: Connected to Arduino Mega 2560 D20/SDA, MPU-6050 SDA
Micro SD Card Module
- cs: Connected to Arduino Mega 2560 D53
- sck: Connected to Arduino Mega 2560 D52, NRF24L01 SCK
- mosi: Connected to Arduino Mega 2560 D51, NRF24L01 MOSI
- miso: Connected to Arduino Mega 2560 D50, NRF24L01 MISO
- vcc: Connected to Arduino Mega 2560 5V
- gnd: Connected to Arduino Mega 2560 GND
NRF24L01
- VCC (3V): Connected to Arduino Mega 2560 3V3
- GND: Connected to Arduino Mega 2560 GND
- SCK: Connected to Arduino Mega 2560 D52, Micro SD Card Module sck
- MOSI: Connected to Arduino Mega 2560 D51, Micro SD Card Module mosi
- MISO: Connected to Arduino Mega 2560 D50, Micro SD Card Module miso
- CE: Connected to Arduino Mega 2560 D48
- CSN: Connected to Arduino Mega 2560 D49
MQ-2
- VCC: Connected to Arduino Mega 2560 5V
- GND: Connected to Arduino Mega 2560 GND
- ANALOG: Connected to Arduino Mega 2560 A6
GPS NEO 6M
- VCC: Connected to Arduino Mega 2560 5V
- GND: Connected to Arduino Mega 2560 GND
- RX: Connected to Arduino Mega 2560 D19/RX1
- TX: Connected to Arduino Mega 2560 D18/TX1
ESP32 CAM
- 3.3V / 5V / P_OUT: Connected to Arduino Mega 2560 5V
- GND: Connected to Arduino Mega 2560 GND
- GPIO1 / TX: Connected to Arduino Mega 2560 D17 PWM/RX2
- GPIO3 / RX: Connected to Arduino Mega 2560 D16 PWM/TX2
Documented Code
Arduino Mega 2560 Code
void setup() {
// put your setup code here, to run once:
}
void loop() {
// put your main code here, to run repeatedly:
}
This code is a basic template for the Arduino Mega 2560. The setup function is used to initialize any settings or configurations, and the loop function contains the main code that runs repeatedly.