DIY ESP32 Blinker: Designing and Building a Temperature Alarm Device Using ESP321.Hardware Materials:1 * ESP32 development board1 * DHT11 temperature and humidity module1 * MQ-2 smoke module1 * MX1508 motor driver module1 * DC motor1 * OLED display module [white] [0.96 inches]1 * Buzzer module1 * MLX90614 infrared temperature measurement module1 * 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 appStep4: 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 diagram3.1Schematic diagram:3.2PCB diagram3.33D diagram3.4complete Arduino codeBelow is the detailed process of the development code.4.Effect Demonstration4.1Blinker APP Mobile Interface4.2Video [https://www.bilibili.com/video/BV16u41127e6/ link]Tag:Temperature Alarm Device, ESP32 Development Board, Electronic Components