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Adafruit SGP30 TVOC/eCO2 Gas Sensor

Detect a wide range of Volatile Organic Compounds (VOCs) and H2 and is intended for indoor air quality monitoring.

Breathe easy with the SGP30 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 and fully calibrated output signals with a typical accuracy of 15% within measured values. The SGP combines multiple metal-oxide sensing elements on one chip to provide more detailed air quality signals.

Adafruit BME680

The BME680 combines Temperature, Humidity, Pressure and Gas Sensing!

The long awaited BME680 from Bosch gives you all the environmental sensing you want in one small package. This little sensor contains temperature, humidity, barometric pressure and VOC gas sensing capabilities. All over SPI or I2C, at a great price!

Adafruit CCS811 Air Quality Sensor

A sensor to sense the presence of different gasses in the air we breathe.

Breathe easy - we finally have an I2C VOC/eCO2 sensor in the Adafruit shop! Add air quality monitoring to your project and with an Adafruit CCS811 Air Quality Sensor Breakout. This sensor from AMS is a gas sensor that can detect a wide range of Volatile Organic Compounds (VOCs) and is intended for indoor air quality monitoring.

Adafruit Si7021 Temperature + Humidity Sensor

Get the current ambient temperature and humidity

This lovely sensor for Silicon labs has ± 3% relative humidity measurements with a range of 0–80% RH, and ±0.4 °C temperature accuracy at a range of -10 to +85 °C. Great for all of your environmental sensing projects. It uses I2C for data transfer so it works with a wide range of microcontrollers.

Adafruit VEML6070 UV Sensor Breakout

Read UV light intensity over I2C

This little sensor is a great way to add UV light sensing to any microcontroller project. The VEML6070 from Vishay has a true UV A light sensor and an I2C-controlled ADC that will take readings and integrate them for you over ~60ms to 500ms.

DHT11, DHT22 and AM2302 Sensors

Basic temperature & humidity sensors

This guide covers the low cost DHT temperature & humidity sensors. These sensors are very basic and slow, but are great for hobbyists who want to do some basic data logging. We'll cover the lower-cost DHT11 as well as the DHT22 and AM2302

PM2.5 Air Quality Sensor

This sensor is like a breath of fresh air

Measure particulate matter in your air with a PM2.5 sensor, which uses a laser to detect particles and report back the air quality.

ESP8266 WiFi Weather Station with Color TFT Display

Build a Weather Station with ESP8266

by Ruiz Brothers

Use the ESP8266 to pull weather conditions and forecast to display them on a color TFT touch screen display.

Manually bridging MQTT to Adafruit.IO

Get sensor data from a local MQTT broker into Adafruit.IO

by Philip Moyer

Multiple MQTT brokers are bridged (manually) to allow sensor data to flow from a local network to io.adafruit.com!

Huzzah Weather Display

a simple WiFi OLED weather display

A weather display device using the Huzzah WiFi module and 1.3" OLED display.

Adafruit BMP280 Barometric Pressure + Temperature Sensor Breakout

Buld your next weather sensing system

Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature and barometric pressure! This sensor is great for all sorts of weather/environmental sensing and can even be used in both I2C and SPI!

Adafruit BME280 Humidity + Barometric Pressure + Temperature Sensor Breakout

Buld your next weather and enviromental sensing system

Bosch has stepped up their game with their new BME280 sensor, an environmental sensor with temperature, barometric pressure and humidity! This sensor is great for all sorts of weather/environmental sensing and can even be used in both I2C and SPI!

Calibrating Sensors

Get peak performance from all your sensors.

Most modern sensors perform quite well right out-of-the-box. But the sensor is only part of the measurement system. For best accuracy in critical applications, you will want to calibrate.

Create an Internet of Things Dashboard with Adafruit IO

Visualise data measurements inside an online Adafruit IO dashboard

In this guide you will learn how to make measurements (temperature, humidity, ambient light) with an Arduino board and send this data via WiFi to Adafruit IO. You will then be able to visualise this data in real-time, from anywhere in the world!

Adafruit BMP183 SPI Barometric Pressure & Altitude Sensor

All the joy of a BMP085 - in SPI format!

The BMP183 is the next-generation of sensors from Bosch, and is the fraternal twin of the BMP180 - with a low altitude noise of 0.25m and the same fast conversion time. It has the same specifications, but uses SPI instead of I2C. This is great for users where there is an I2C address collision, they want more than one sensor on a single microcontroller, more flexibility on pin usage, or just prefer the simplicity of SPI.

Adafruit HTU21D-F Temperature & Humidity Sensor

Easy and precise temp and humidity monitoring

It's summer and you're sweating and your hair's all frizzy and all you really want to know is why the weatherman said this morning that today's relative humidity would max out at a perfectly reasonable 52% when it feels more like 77%. Enter the HTU21D-F Temperature + Humidity Sensor - the best way to prove the weatherman wrong!

Adafruit CC3000 WiFi and Xively

Connect sensors to Xively with Arduino & the CC3000 WiFi chip!

In this guide you will learn how to connect your sensors to the Internet of Things platform Xively using Arduino & the Adafruit CC3000 WiFi breakout board. With Xively, you can then monitor the status of your sensors from anywhere using the Xively web interface.

Trinket Temperature & Humidity LCD Display

Monitor temperature and humidity on an LCD display with this compact Trinket-based project

The Trinket mini microcontroller is perfect for displaying project information to devices using the I2C (2 wire) protocol. Here we show the project and code for a circuit which monitors the popular DHT series temperature and humidity sensors.

Bosch BMP085 Breakout Board

Barometric Pressure, Temperature, & Altitude Sensor

This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. This is a detailed guide so you can understand the sensor in depth including how to properly calculate altitude based on sea-level barometric pressure.