EMC

OpenAirScope 🌍💨

OpenAirScope is an open-source hardware and software project designed for advanced environmental monitoring and air quality measurement. It is based on the STM32H743 and ESP32-C3, supports LoRaWAN, and is equipped with a wide range of up-to-date sensors and display options.

PCB 3D

Features

• High-Performance MCU:

  • STM32H743 (ARM Cortex-M7, 400 MHz)
  • Capable of running advanced algorithms and real-time data processing
  • Multiple communication interfaces (I²C, SPI, UART, CAN, USB, RS485)

• Wireless Communication:

  • ESP32-C3-WROOM-02 → Wi-Fi + Bluetooth LE
  • RAK3172 (LoRaWAN) → Low-power, long-range wireless communication
  • External SMA antenna connector (for LoRa)

• Sensor Support (Optional/Modular):

  • SGP41-D-R4 → Gas sensor (VOC and NOx measurement)
  • SCD40-D-R2 → CO₂, temperature, and humidity sensor
  • SPS30 → Particulate matter sensor (PM1.0, PM2.5, PM4, PM10)
  • LTR-303ALS-01 (Optional) → Ambient light sensor
  • SPH0645LM4H-B (2 units) → Digital MEMS microphone (ambient noise, sound level, acoustic analysis)
  • Expandable design: additional sensors such as pressure or UV can be integrated

• Display:

  • 1.5-inch RGB OLED Display Module
  • 65K RGB colors, 128×128 resolution
  • SPI interface for fast graphics and real-time data visualization

• Power Management:

  • Li-Ion battery support
  • USB-powered with simultaneous battery charging
  • Suitable for both portable and stationary applications

• Flexible Communication:

  • USB-C interface
  • RS485 (for industrial environments)
  • CAN-Bus support
  • IoT integration via Wi-Fi and LoRaWAN

• Modular Design:

  • Optional sensor add/remove capability
  • External SMA antenna for long-range connectivity
  • Developer-friendly accessible pinout

• Software:

  • STM32CubeIDE / PlatformIO support
  • Open-source drivers and example libraries
  • Example algorithms for air quality and environmental data evaluation
  • OLED display example code for real-time visualization of sensor data

Use Cases

• Smart city solutions
• Industrial environment monitoring
• Indoor/outdoor air quality tracking
• Noise pollution and sound analysis
• Portable IoT devices with OLED display
• Long-range LoRaWAN field applications
• Research and education projects

Contributing

This project is open source. Contributions are welcome for new sensor support, software development, or documentation improvements. You can submit pull requests or open issues.

License

Released under the MIT License.

CRITICAL WARNING: This PCB design is currently an experimental, unverified prototype (AS-IS). I have not yet manufactured or functionally tested this version. Proceeding with production carries a high risk of failure and is undertaken solely at your own risk.