AirMonitor (CO2, VOC)
thingiverse
This is a CO2/TVOC air quality monitor designed for monitoring indoor air quality. It's built on a TTGO T4 V1.3 board and uses an MH-Z19B and CCS811 sensor. It comes equipped with the following features: 1. Real-time graphs display current conditions. 2. Bluetooth support enables connection to a mobile app. 3. TVOC measurement detects volatile organic compounds. 4. CO2 measurement monitors carbon dioxide levels. 5. Battery power allows for portability. The source code is available here: Bluetooth app: https://github.com/wilyarti/AirMonitor ESP32 firmware: https://github.com/wilyarti/dustMonitor The mobile app, still in development, can be installed from this link (Android only): https://github.com/wilyarti/AirMonitor/blob/master/AirMonitor.apk To build the device, flash the firmware.bin file to the TTGO T4 V1.3 board. Pin connections are as follows: MH-Z19B: - Transmit pin: 33 - Receive pin: 35 - Power voltage: 5v CCS811: - SDA pin: 19 - SCL pin: 26 - Power voltage: 3.3v
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