ESP32-Based Flame and Gas Detection System with Buzzer and LCD Display
Circuit Documentation
Summary
This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a buzzer, a 16x2 I2C LCD, a KY-026 Flame Sensor, and an MQ-2 gas sensor. The circuit is designed to detect flame and gas presence and provide visual and auditory alerts.
Component List
ESP32 (30 pin)
- Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
- Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3
Buzzer
- Description: An audio signaling device.
- Pins: PIN, GND
16x2 I2C LCD
- Description: A 16x2 character LCD with I2C interface.
- Pins: GND, VCC, SDA, SCL
KY-026 Flame Sensor
- Description: A sensor module for detecting flame.
- Pins: AO, GND, VCC, DO
MQ-2
- Description: A gas sensor module for detecting various gases.
- Pins: GND, VCC, ANALOG, Digital
Wiring Details
ESP32 (30 pin)
GND is connected to:
- KY-026 Flame Sensor (GND)
- MQ-2 (GND)
- Buzzer (GND)
- 16x2 I2C LCD (GND)
3V3 is connected to:
- KY-026 Flame Sensor (VCC)
- MQ-2 (VCC)
D34 is connected to:
- KY-026 Flame Sensor (DO)
D23 is connected to:
- Buzzer (PIN)
D35 is connected to:
- MQ-2 (Digital)
Vin is connected to:
- 16x2 I2C LCD (VCC)
D22 is connected to:
- 16x2 I2C LCD (SCL)
D21 is connected to:
- 16x2 I2C LCD (SDA)
Buzzer
PIN is connected to:
- ESP32 (D23)
GND is connected to:
- ESP32 (GND)
- 16x2 I2C LCD (GND)
16x2 I2C LCD
GND is connected to:
- ESP32 (GND)
- Buzzer (GND)
VCC is connected to:
- ESP32 (Vin)
SDA is connected to:
- ESP32 (D21)
SCL is connected to:
- ESP32 (D22)
KY-026 Flame Sensor
GND is connected to:
- ESP32 (GND)
VCC is connected to:
- ESP32 (3V3)
DO is connected to:
- ESP32 (D34)
MQ-2
GND is connected to:
- ESP32 (GND)
VCC is connected to:
- ESP32 (3V3)
Digital is connected to:
- ESP32 (D35)
Code
No code is provided for this circuit.
This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code documentation. The wiring details section ensures that each component's connections are clearly outlined, facilitating easy assembly and troubleshooting.