DIY ESP32 Blinker: Designing and Building a Temperature Alarm Device Using ESP32
1.Hardware Materials:
1 * ESP32 development board
1 * DHT11 temperature and humidity module
1 * MQ-2 smoke module
1 * MX1508 motor driver module
1 * DC motor
1 * OLED display module [white] [0.96 inches]
1 * Buzzer module
1 * MLX90614 infrared temperature measurement module
1 * MICRO data cable [0.5m]
1 * Battery [USB-A/microUSB]
Other potential components required (breadboard, resistors, capacitors, wires/DuPont wires, etc.)
Possible tools needed (multimeter, soldering iron and solder, pliers/scissors, wire strippers/lighter, regular tape/electrical tape/glue gun, etc.)
2.Functionality:
Step1:The [https://www.unikeyic.com/products/100260146533367/ESP32-C3-13.html ESP32] development board reads temperature and humidity using the DHT11 sensor module, displaying the environmental temperature and humidity on the OLED screen and mobile app. When the temperature exceeds a certain level, the fan will be turned on.
Step2: The ESP32 development board monitors smoke gas concentration using the MQ-2 smoke sensor module. If the concentration exceeds a predefined level, the buzzer will trigger an alarm. The current smoke concentration and alarm status can be viewed on both the OLED screen and the mobile app.
Step3: The ESP32 development board measures both object and ambient temperatures using the MLX90614 infrared thermometer module. If the body temperature exceeds a specified threshold, warning messages will be displayed on the OLED screen and the mobile app
Step4: Users can set the smoke concentration threshold via the mobile app.
Step5: Users can configure the environmental temperature threshold through the mobile app.
Step6: Users can set the human body temperature threshold via the mobile app.
For any details not specifically covered, please consult the requirements and concept images/videos for guidance.
3.post-update circuit diagram
3.1Schematic diagram:
3.2PCB diagram
3.33D diagram
3.4complete Arduino code
Below is the detailed process of the development code.
4.Effect Demonstration
4.1Blinker APP Mobile Interface
4.2Video [https://www.bilibili.com/video/BV16u41127e6/ link]
Tag:Temperature Alarm Device, ESP32 Development Board, Electronic Components