47 lines
2.2 KiB
Markdown
47 lines
2.2 KiB
Markdown
# MicroEnv v1.x
|
|
|
|
MicroEnv is a compact and simplistic environmental monitoring sensor,
|
|
based on the ESP32-C3 and the Sensirion SGP30 and SHT45 sensors, using
|
|
ESPHome for integration with HomeAssistant
|
|
|
|
Use a MicroEnv near a source of emissions to monitor air quality, or as
|
|
a general room environmental tracking sensor.
|
|
|
|
Power is provided by USB-C, though a very slim cable is required when
|
|
using SMD soldering without a buffer.
|
|
|
|
The Sensirion sensors are elevated with through-hole pins, to ensure
|
|
optimal distance between the (warm) board and the sensors themselves.
|
|
|
|
For more details, please [see my blog post on the MicroEnv project](https://www.boniface.me/the-microenv/).
|
|
|
|
## Parts List
|
|
|
|
| Qty | Component | Cost (2025/05 CAD, ex. shipping) | Links |
|
|
|-------|--------------------|----------------------------------|-------|
|
|
| 1 | GY-SGP30 | $5.73 | [AliExpress](https://www.aliexpress.com/item/1005008473372972.html) |
|
|
| 1 | GY-SHT45 | $5.67 | [AliExpress](https://www.aliexpress.com/item/1005008175340220.html)* |
|
|
| 1 | ESP32-C3 | $3.12 | [AliExpress](https://www.aliexpress.com/item/1005007205044247.html) |
|
|
| 1 | Custom PCB (JLC) | $0.50 ($5.00/10) | [GitHub](https://github.com/joshuaboniface/microenv) |
|
|
| **TOTAL** | | **$15.02** | |
|
|
|
|
`*` Ensure you select the correct device on the page as it shows multiple options.
|
|
|
|
## Configurable Options
|
|
|
|
There are several UI-configurable options with the MicroEnv to help you get
|
|
the most out of the sensor for your particular use-case.
|
|
|
|
### Temperature Offset (selector, -30 to +10 @ 0.1, -5 default)
|
|
|
|
Allows calibration of the SHT45 temperature sensor with an offset from -30 to +10
|
|
degrees C. Useful if the sensor is misreporting actual ambient tempreatures. Due
|
|
to internal heating of the SHT45 by the ESP32, this defaults to -5; further
|
|
calibration may be needed for your sensors and environment.
|
|
|
|
### Humidity Offset (selector, -20 to +20 @ 0.1)
|
|
|
|
Allows calibration of the SHT45 humidity sensor with an offset from -20 to +20
|
|
percent relative humidity. Useful if the sensor is misreporting actual humidity.
|
|
|