Adafruit SCD-40 and SCD-41 CO2 sensing over I2C in a tiny package! by Kattni Rembor published August 26, 2021, last edited May 07, 2025 last major update August 12, 2022 posted in Adafruit Products Sensors/ Temperature & Humidity CircuitPython Breakout Boards Programming/ Python Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Link Note Download Overview Pinouts Python & CircuitPython Python Docs Arduino WipperSnapper Downloads Single page Feedback? Corrections? Text View Primary Products Adafruit SCD-40 - True CO2, Temperature and Humidity Sensor Out of Stock Adafruit SCD-41 - True CO2 Temperature and Humidity Sensor Out of Stock Featured Products view all STEMMA QT / Qwiic JST SH 4-Pin Cable - 50mm Long Out of Stock STEMMA QT / Qwiic JST SH 4-pin to Premium Male Headers Cable Out of Stock STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long Out of Stock 38 Beginner Product guide 😍 2 Downloads Files SCD-4x datasheet EagleCAD PCB files on GitHub 3D models on GitHub Fritzing object in the Adafruit Fritzing Library Schematic and Fab Print Fab print shows SCD-41 - the SCD-40 is the same! Page last edited March 08, 2024 Text editor powered by tinymce. WipperSnapper