# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/142/338/medium800thumb/sensors_6455-06_1.jpg?1770918210)

\*sniff\* \*sniff\* ... do you smell that? No need to stick your nose into a carton of milk anymore, you can build a digital nose with the **Adafruit SGP41 Multi-Pixel Gas Sensor** , a fully integrated MOX gas sensor. This is a very fine air quality sensor from the sensor experts at Sensirion, with I2C interfacing so you don't have to manage the heater and analog reading of a MOX sensor. It combines multiple metal-oxide sensing and heating elements on one chip to provide more detailed air quality signals - and, unlike the SGP40, the SGP41 adds a dedicated NOx sensing pixel so you can measure both [volatile organic compounds](https://en.wikipedia.org/wiki/Volatile_organic_compound) (VOC) _and_ nitrogen oxides!

![](https://cdn-learn.adafruit.com/assets/assets/000/142/339/medium800/sensors_6455-04.jpg?1770918303)

The SGP41 has two MOX hot-plate sensor elements (one for VOC, one for NOx), as well as a small microcontroller that controls power to the plates, reads the analog voltages, and provides an I2C interface to read from. Unlike the CCS811, this sensor does not require I2C clock stretching. [We currently have an Arduino library for reading the raw VOC and NOx signals](https://github.com/adafruit/Adafruit_SGP41) and [a Python/CircuitPython library](https://github.com/adafruit/Adafruit_CircuitPython_SGP41) that can be used with Linux computers like the Raspberry Pi or our CircuitPython boards.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/340/medium800/sensors_6455-02.jpg?1770918345)

This is a gas sensor that can detect a wide range of Volatile Organic Compounds (VOCs) as well as oxidizing gases such as NOx, and is intended for indoor air quality monitoring. **The SGP41 is the next generation after the SGP40, adding a second NOx sensing pixel. It does not give TVOC/eCO2 values out like the SGP30.** Instead, [the two raw signals from the sensor are processed using Sensirion's Gas Index Algorithm to give VOC and NOx Index values on a scale from 1 to 500](https://github.com/Sensirion/gas-index-algorithm) - where 100 indicates a typical indoor environment.

**Please note, this sensor, like all VOC/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources!** That said, for general environmental sensors, it will give you a good idea of trends and comparison.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/341/medium800/sensors_6455-03.jpg?1770918392)

Another nice element to this sensor is the ability to set humidity and temperature compensation for better accuracy. An external humidity/temperature sensor is required and then the RH% and temperature are written over I2C to the sensor, so it can better calibrate the MOX sensor readings and reduce humidity/temperature-based variations.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/342/medium800/sensors_6455-01.jpg?1770918418)

Nice sensor right? So we made it easy for you to get right into your next project. The surface-mount sensor is soldered onto a custom made PCB in the [**STEMMA QT** form factor](https://www.adafruit.com/?q=stemma%20qt%20sensor "STEMMA QT form factor"), making them easy to interface with. The [STEMMA QT connectors](https://learn.adafruit.com/introducing-adafruit-stemma-qt/what-is-stemma-qt) on either side are compatible with the [SparkFun Qwiic](https://www.sparkfun.com/qwiic) I2C connectors. This allows you to make solderless connections between your development board and the SGP41 or to chain it with a wide range of other sensors and accessories using a [**compatible cable**](https://www.adafruit.com/?q=stemma%20qt%20cable). [QT Cable is not included, but we have a variety in the shop](https://www.adafruit.com/?q=stemma+qt+cable&sort=BestMatch)

We've, of course, broken out all the pins to standard headers and added a 3.3V voltage regulator and level shifting to allow you to use it with either 3.3V or 5V systems, such as the Arduino Uno, or Feather M4.

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Pinouts

![](https://cdn-learn.adafruit.com/assets/assets/000/142/346/medium800/sensors_double.jpg?1770921410)

The default I2C address is **0x59**.

## Power Pins

- **VIN**  - this is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V. For a 3.3V microcontroller, use 3.3V.
- **3.3V**  - this is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like.
- **GND**  - common ground for power and logic.

## I2C Logic Pins

- **SCL****   **- I2C clock pin, connect to your microcontroller I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a ** 10K pullup** on this pin.
- **SDA****   **- I2C data pin, connect to your microcontroller I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a ** 10K pullup** on this pin.
- **[STEMMA QT](https://learn.adafruit.com/introducing-adafruit-stemma-qt) - **These connectors allow you to connect to dev boards with  **STEMMA QT**  connectors or to other things with [various associated accessories](https://www.adafruit.com/?q=JST%20SH%204).

## Power LED

- **Power LED - ** In the upper left corner, above the STEMMA connector, on the front of the board, is the power LED, labeled ** on**. It is a green LED.

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## CircuitPython and Python

It's easy to use the  **SGP41**  with Python or CircuitPython, and the [Adafruit\_CircuitPython\_SGP41](https://github.com/adafruit/Adafruit_CircuitPython_SGP41) module. This module allows you to easily write Python code that allows you to read the **SGP41** gas sensor. You can use this gas sensor with any CircuitPython microcontroller board or with a computer that has GPIO and Python [thanks to Adafruit\_Blinka, our CircuitPython-for-Python compatibility library](https://learn.adafruit.com/circuitpython-on-raspberrypi-linux).

## CircuitPython Microcontroller Wiring

First, wire up an SGP41 to your board exactly as shown below. Here's an example of wiring a Feather RP2040 to the SGP41 with I2C using one of the handy [**STEMMA QT**](https://learn.adafruit.com/introducing-adafruit-stemma-qt) connectors:

- **Board STEMMA 3V** to **breakout STEMMA **** VIN (red wire)**  
- **Board STEMMA GND** to **breakout**  **STEMMA** **GND (black wire)**  
- **Board STEMMA SCL** to **breakout**  **STEMMA** **SCL (yellow wire)**  
- **Board STEMMA SDA** to **breakout**  **STEMMA** **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/354/medium640/sensors_feather_stemma_bb.jpg?1771007744)

You can also use standard  **0.100" pitch**  headers to wire it up on a breadboard:

- **Board 3V** to **breakout** **VIN (red wire)**  
- **Board GND** to **breakout**  **GND (black wire)**  
- **Board SCL** to **breakout** **SCL (yellow wire)**  
- **Board SDA** to **breakout** **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/355/medium640/sensors_feather_bb_bb.jpg?1771007774)

## Python Computer Wiring

Since there's _dozens_ of Linux computers/boards you can use, below shows wiring for Raspberry Pi. For other platforms, [please visit the guide for CircuitPython on Linux to see whether your platform is supported](https://learn.adafruit.com/circuitpython-on-raspberrypi-linux). 

Here's the Raspberry Pi wired to the gas sensor using I2C and a [**STEMMA QT**](https://learn.adafruit.com/introducing-adafruit-stemma-qt) connector:

- **Pi 3V** to **breakout STEMMA** **VIN (red wire)**  
- **Pi GND** to **breakout**  **STEMMA** **GND (black wire)**  
- **Pi SCL** to **breakout**  **STEMMA** **SCL (yellow wire)**  
- **Pi SDA** to **breakout**  **STEMMA** **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/356/medium640/sensors_piStemma_bb.jpg?1771007806)

Finally, here is an example of how to wire up a Raspberry Pi to the gas sensor using a solderless breadboard:

- **Pi 3V** to **breakout** **VIN (red wire)**  
- **Pi GND** to **breakout**  **GND (black wire)**  
- **Pi SCL** to **breakout**  **SCL (yellow wire)**  
- **Pi SDA** to **breakout**  **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/357/medium640/sensors_piBB_bb.jpg?1771007837)

## Python Installation of SGP41 Library

You'll need to install the  **Adafruit\_Blinka**  library that provides the CircuitPython support in Python. This may also require enabling I2C on your platform and verifying you are running Python 3. [Since each platform is a little different, and Linux changes often, please visit the CircuitPython on Linux guide to get your computer ready](https://learn.adafruit.com/circuitpython-on-raspberrypi-linux)!

Once that's done, from your command line run the following command:

- `pip3 install adafruit-circuitpython-sgp41`

If your default Python is version 3, you may need to run `pip` instead. Make sure you aren't trying to use CircuitPython on Python 2.x, it isn't supported!

## CircuitPython Usage

To use with CircuitPython, you need to first install the SGP41 library and its dependencies into the  **lib**  folder on your  **CIRCUITPY**  drive. Then you need to update  **code.py**  with the example script.

Thankfully, we can do this in one go. In the example below, click the  **Download Project Bundle**  button below to download the necessary libraries and the  **code.py**  file in a zip file. Extract the contents of the zip file, and copy the  **entire **** lib ** ** folder ** and the ** code.py ** file to your ** CIRCUITPY** drive.

Your  **CIRCUITPY/lib**  folder should contain the following folders and file:

- **adafruit\_bus\_device/**
- **adafruit\_sgp41.mpy**

![CIRCUITPY drive](https://adafruit.github.io/Adafruit_CircuitPython_Bundle/sgp41_sgp41_simpletest.py.png )

## Python Usage

Once you have the library `pip3` installed on your computer, copy or download the following example to your computer, and run the following, replacing  **code.py**  with whatever you named the file:

`python3 code.py`

## Example Code

**If running CircuitPython:**  Once everything is saved to the  **CIRCUITPY**  drive, [connect to the serial console](https://learn.adafruit.com/welcome-to-circuitpython/kattni-connecting-to-the-serial-console) to see the data printed out!

**If running Python: ** The console output will appear wherever you are running Python.

https://github.com/adafruit/Adafruit_CircuitPython_SGP41/blob/main/examples/sgp41_simpletest.py

In the example, the gas sensor is instantiated on I2C and conditioned 10 times over 10 seconds. Then, in the loop, raw VOC and NOx readings are printed to the REPL every second.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/358/medium800/sensors_Screenshot_2026-02-13_134444.png?1771008298)

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Python Docs

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Arduino

Using the SGP41 gas sensor with Arduino involves wiring up the sensor to your Arduino-compatible microcontroller, installing the [Adafruit\_SGP41](https://github.com/adafruit/Adafruit_SGP41) library and running the provided example code.

## Wiring

Wire as shown for a  **5V**  board like an Uno. If you are using a ** 3V**  board, like an Adafruit Feather, wire the board's 3V pin to the SGP41 VIN.

Here is an Adafruit Metro wired up to the SGP41 using the STEMMA QT connector:

- **Board 5V** to **breakout STEMMA** **VIN (red wire)**  
- **Board GND** to **breakout**  **STEMMA** **GND (black wire)**  
- **Board SCL** to **breakout**  **STEMMA** **SCL (yellow wire)**  
- **Board SDA** to **breakout**  **STEMMA** **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/352/medium640/sensors_metroSTEMMA_bb.jpg?1771007623)

Here is an Adafruit Metro wired up using a solderless breadboard:

- **Board 5V** to **breakout** **VIN (red wire)**  
- **Board GND** to **breakout**  **GND (black wire)**  
- **Board SCL** to **breakout**  **SCL (yellow wire)**  
- **Board SDA** to **breakout**  **SDA (blue wire)**

![](https://cdn-learn.adafruit.com/assets/assets/000/142/353/medium640/sensors_metroBB_bb.jpg?1771007652)

## Library Installation

You can install the **Adafruit SGP41** library for Arduino using the Library Manager in the Arduino IDE.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/347/medium800/sensors_Arduino_Open_Library_Manager.png?1770921860)

Click the **Manage Libraries ...** menu item, search for **Adafruit SGP41** , and select the **Adafruit SGP41** library:

![](https://cdn-learn.adafruit.com/assets/assets/000/142/348/medium800/sensors_Screenshot_2026-02-12_134542.png?1770921980)

If asked about dependencies, click " **Install all**".

![](https://cdn-learn.adafruit.com/assets/assets/000/142/349/medium800/sensors_Screenshot_2026-02-12_134635.png?1770922004)

If the "Dependencies" window does not come up, then you already have the dependencies installed.

Warning: If the dependencies are already installed, you must make sure you update them through the Arduino Library Manager before loading the example!

## Example Code
https://github.com/adafruit/Adafruit_SGP41/blob/main/examples/simpletest/simpletest.ino

Upload the sketch to your board and open up the Serial Monitor ( **Tools -\> Serial Monitor** ) at 115200 baud. You should see that the sketch has found your connected SGP41 sensor. Then, after conditioning the sensor, raw readings for VOC and NOx are printed to the Serial Monitor every second.

![](https://cdn-learn.adafruit.com/assets/assets/000/142/350/medium800/sensors_Screenshot_2026-02-12_140442.png?1770923092)

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Arduino Docs

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## WipperSnapper

![](https://cdn-learn.adafruit.com/assets/assets/000/143/140/medium800/sensors_Screenshot_2026-03-20_170728.png?1774026453)

## What is WipperSnapper

WipperSnapper is a firmware designed to turn any WiFi-capable board into an Internet-of-Things device without programming a single line of code. WipperSnapper connects to [Adafruit IO](https://io.adafruit.com/), a web platform designed ([by Adafruit!](https://www.adafruit.com/about)) to _display_, _respond_, and _interact_ with your project's data.

Simply load the WipperSnapper firmware onto your board, add credentials, and plug it into power. Your board will automatically register itself with your Adafruit IO account.

From there, you can add _components_ to your board such as buttons, switches, potentiometers, sensors, and more! Components are _dynamically _added to hardware, so you can immediately start interacting, logging, and streaming the data your projects produce without writing code.

If you've never used WipperSnapper, click below to read through the quick start guide before continuing.

[Quickstart: Adafruit IO WipperSnapper](https://learn.adafruit.com/quickstart-adafruit-io-wippersnapper)
## Wiring
Wire up the SGP41 sensor as follows, using our convenient [STEMMA QT](https://learn.adafruit.com/introducing-adafruit-stemma-qt) cables, or via a breadboard.

- **Board 3V**  to  **breakout **** VIN (red wire)**  
- **Board GND**  to  **breakout**  **GND (black wire)**  
- **Board SCL**  to  **breakout**  **SCL (yellow wire)**  
- **Board SDA**  to  **breakout**  **SDA (blue wire)**

Or, using the Stemma QT / Qwiic connectors and a compatible cable.

![Feather ESP32 V2 board mounted on a prototyping breadboard, wired to an Adafruit SGP41 sensor using jumper wires.](https://cdn-learn.adafruit.com/assets/assets/000/143/143/medium640/sensors_featherV2_SGP41_bb_bb.png?1774027355)

![](https://cdn-learn.adafruit.com/assets/assets/000/143/343/medium640/sensors_featherV2_SGP41_stemma_bb.png?1774623654)

## Usage

Connect your board to Adafruit IO Wippersnapper and **[navigate to the WipperSnapper board list](https://io.adafruit.com/wippersnapper).**

On this page, **select the WipperSnapper board you're using** to be brought to the board's interface page.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/141/medium800/sensors_RQNhj9y4Pk.png?1774026727)

If you do not see your board listed here - you need [to connect your board to Adafruit IO](https://learn.adafruit.com/quickstart-adafruit-io-wippersnapper) first.

On the device page, quickly  **check that you're running the latest version of the WipperSnapper firmware**.

The device tile on the left indicates the version number of the firmware running on the connected board.

- **If the firmware version is green with a checkmark -**  continue with this guide.
- **If the firmware version is red with an exclamation mark "!" -**  [update to the latest WipperSnapper firmware](https://learn.adafruit.com/quickstart-adafruit-io-wippersnapper) on your board before continuing.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/180/medium640/sensors_DNAxWVz8Z1.png?1774046052)

![](https://cdn-learn.adafruit.com/assets/assets/000/143/181/medium640/sensors_VG2VtiCI9Q.png?1774046058)

Next, make sure the sensor is plugged into your board and click the ** I2C Scan ** button.

![](https://cdn-learn.adafruit.com/assets/assets/000/113/177/medium800/sensor_page_crop_scan.png?1657724520)

You should see the SGP41's default I2C address of `0x59` pop-up in the I2C scan list.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/144/medium800/sensors_Screenshot_2026-03-20_172853.png?1774027747)

###  I don't see the sensor's I2C address listed! 


First, double-check the connection and/or wiring between the sensor and the board.

Then, reset the board and let it re-connect to Adafruit IO WipperSnapper.

With the sensor detected in an I2C scan, you're ready to add the sensor to your board.

**Click the New Component button or the + button** to bring up the component picker.

![](https://cdn-learn.adafruit.com/assets/assets/000/127/931/medium800/sensor_page_temperature___humidity_06_AddComponent.png?1708631009)

Adafruit IO supports a large amount of components. To quickly find your sensor, type `SGP41` into the search bar, then select the  **SGP41** component.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/172/medium800/sensors_9lHHgvo6Kd.png?1774044932)

On the component configuration page, the SGP41's sensor address should be listed along with the sensor's settings.

The  **Send Every**  option is specific to each sensor's measurements. This option will tell the Feather how often it should read from the SGP41 sensor and send the data to Adafruit IO. Measurements can range from every second to every 24 hours.

For this example, set the  **Send Every ** interval to every 30 seconds.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/173/medium800/sensors_GjBA5VGpZd.png?1774045301)

Your device interface should now show the sensor components you created. After the interval you configured elapses, WipperSnapper will automatically read values from the sensor(s) and send them to Adafruit IO.

Info: Please note, this sensor, like all VOC/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources! It's also designed to require a reference temperature and humidity sensor (currently unsupported in WipperSnapper). That said, for general environmental sensors, it will give you a good idea of trends and comparison.

It can take a while for the  **SGP41** to start reporting usable data, even more so the first ever run, and the manufacturer's [quick testing guide](https://sensirion.com/media/documents/1EF1B5BE/618CF369/GAS_AN_SGP41_QuickTestingGuide_D1.pdf) says to leave the sensor in ambient air for 1 hour before verifying NOx.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/174/medium800/sensors_gyhBeWDK53.png?1774045317)

To view the data that has been logged from the sensor, click on the graph next to the sensor name.

![](https://cdn-learn.adafruit.com/assets/assets/000/143/175/medium800/sensors_UsQ3wIiWV2.png?1774045330)

Here you can see the feed history and edit things about the feed such as the name, privacy, webhooks associated with the feed and more. If you want to learn more about how feeds work, [check out this page](https://learn.adafruit.com/all-the-internet-of-things-episode-four-adafruit-io/advanced-feeds).

![](https://cdn-learn.adafruit.com/assets/assets/000/143/176/medium800/sensors_Screenshot_2026-03-20_201827.png?1774045356)

# Adafruit SGP41 Multi-Pixel Gas Sensor Breakout

## Downloads

## Files

- [SGP41 Datasheet](https://cdn-learn.adafruit.com/assets/assets/000/142/343/original/Sensirion_Gas_Sensors_Datasheet_SGP41.pdf?1770918532)
- [EagleCAD PCB files on GitHub](https://github.com/adafruit/Adafruit-SGP41-Gas-Sensor-Breakout-PCB)
- [Fritzing object in the Adafruit Fritzing Library](https://github.com/adafruit/Fritzing-Library/blob/master/parts/Adafruit%20SGP41%20Multi-Pixel%20Gas%20Sensor%20Breakout%20-%20VOC%20%26%20NOx%20-%20STEMMA%20QT.fzpz)

## Schematic and Fab Print
![](https://cdn-learn.adafruit.com/assets/assets/000/142/344/medium800/sensors_schem.png?1770918729)

![](https://cdn-learn.adafruit.com/assets/assets/000/142/345/medium800/sensors_fab.png?1770918749 dimensions are in inches)


## Primary Products

### Adafruit SGP41 Multi-Pixel Gas Sensor Breakout - VOC & NOx

[Adafruit SGP41 Multi-Pixel Gas Sensor Breakout - VOC & NOx](https://www.adafruit.com/product/6455)
\*sniff\* \*sniff\* ... do you smell that? No need to stick your nose into a carton of milk anymore, you can build a digital nose with the **Adafruit SGP41 Multi-Pixel Gas Sensor** , a fully integrated MOX gas sensor. This is a very fine air quality sensor from the sensor experts at...

In Stock
[Buy Now](https://www.adafruit.com/product/6455)
[Related Guides to the Product](https://learn.adafruit.com/products/6455/guides)

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