This project demonstrates the integration of an MQ135 gas sensor with an STM32 microcontroller. The setup reads gas concentration levels and transmits the data via UART. It also includes real-time clock (RTC) functionality and toggles an LED at a regular interval.
- Features
- Hardware Requirements
- Software Requirements
- Setup and Configuration
- How to Use
- Contributing
- License
- Authors
- Reads gas concentration using the MQ135 sensor.
- Transmits sensor data over UART.
- Retrieves and displays real-time clock (RTC) data.
- Toggles an LED every 100 ms for status indication.
- STM32 microcontroller (e.g., STM32F4 series)
- MQ135 gas sensor
- UART interface for data transmission
- RTC module (if not integrated in the MCU)
- LED and resistor for status indication
- STM32CubeIDE or any suitable IDE for STM32 development
- STM32CubeMX for generating initialization code
- HAL (Hardware Abstraction Layer) library
-
Hardware Setup:
- Connect the MQ135 sensor to the ADC pin of the STM32.
- Connect the UART TX and RX pins to a serial communication module.
- Connect an LED with a resistor to a GPIO pin for status indication.
- Ensure the RTC module is connected properly if not integrated.
-
Software Configuration:
- Use STM32CubeMX to configure the peripherals: ADC, UART, GPIO, and RTC.
- Generate the initialization code and import it into your STM32CubeIDE project.
- Build the Project
- Open the project in STM32CubeIDE, build, and upload it to your STM32 microcontroller.
- Monitor Output
- Use a serial terminal (e.g., PuTTY) to monitor the UART output. The sensor data and RTC time/date will be transmitted periodically.
- Adjust Transmission Interval
- Send a string in the format
$<interval>\nvia UART to set the data transmission interval in milliseconds.
- Send a string in the format
- Contributions are welcome! If you have any suggestions or find any bugs, please open an Issue or submit a Pull Request.
This project is licensed under the GPL License - see the LICENSE file for details.
- Muhammed Yavuz Hanege