PM25 And CO2 Sensor ENV-CP(SPS30+SCD40)

After extensive experimentation with the SPS30 and SCD40, we concluded that combining them might prove advantageous.This collaboration resulted in a device utilising two sensors we've frequently employed recently. Their integration delivers PM2.5 monitoring capabilities alongside CO2 detection – a potentially intriguing combination.

We invite everyone to join this new adventure, hoping it becomes a useful sensor fixture – like all SCREEK sensors, working quietly yet reliably around the clock.

It's currently in its first manufacturing batch, with all DIY kits assembled and dispatched within 3-5 days. We aim to test them thoroughly to ensure reliability before dispatch.

Thank you all, and we hope you enjoy it.

Regarding the firmware and usage process, it employs a carefully customised ESPHome firmware that simplifies the workflow. Simply power the sensor, connect to its hotspot ENV-SENSOR-ENV-CP, and configure your Wi-Fi via the pop-up page (if it doesn't appear, ensure you're connected to the hotspot and navigate to http://192.168.4.1 to access the Wi-Fi setup interface). Once complete, Home Assistant will automatically discover the sensor and add it directly.

The entire configuration process is finished once the sensor obtains its Wi-Fi credentials.

HA Interface

News

Title	Date
🎹 ENV-CP and SCO-1 utilize the same CO₂ calibration mechanism; CO₂ calibration may be performed on ENV-CP if necessary.	Dec 29, 2025 11:49 PM
🪧 ENV-CP Online Maintenance Tool is now live. We're thrilled to embark on this new adventure with you.	Dec 11, 2025 10:41 AM
The CO2 and PM25 sensors ENV-CP have been optimized and finalized. The first batch has been manufactured and shipped. Normal DIY production speed is now underway—quickly, with no waiting period.	Nov 16, 2025 12:35 PM
SCREEK CO2 and PM2.5 Sensor ENV-CP (SCD40+SPS30+ESP32-C3+ESPHome) invites you to join the adventure, with a 15% discount.	Nov 13, 2025 12:24 PM

Online tools

🏝️

If you need to reinstall firmware, update to the latest firmware, configure Wi-Fi, or view logs, you can use the online tool to accomplish these tasks. Simply connect the device to your computer via USB cable and open the webpage using Chrome.

https://tool.screek.io/factory_tool/env-cp/

Buy It

https://shop.screek.io/products/env-cp

https://www.ebay.com/itm/187764292609

SCREEK CO2 Family Sensor Size Comparison

Thanks to everyone's help, we explored these highly specialized and fascinating CO2 sensor components from Switzerland and gained valuable insights about them. While we may not have detailed their dimensions earlier, here is a size comparison:

SCO2-30 (SCD30): 60.2 x 34.5 x 16.5mm
SCO2-1 (SCD40): 54.7 x 27.9 x 16.3mm
SCO2-1S (SCD41): 54.9 x 27.9 x 18.4mm
ENV-CP (SCD40 + SPS30): 56.0 x 47.1 x 30.6mm