SKU: TH2051
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Adafruit BME280 I2C/SPI Temperature Humidity Pressure Sensor is a Bosch-based environmental sensor breakout for measuring temperature, relative humidity, and barometric pressure from a single board. It is well suited for indoor monitoring, weather sensing, and altitude estimation projects.
The breakout supports both I2C and SPI, giving you flexibility for simple two-wire connections or for multi-sensor setups where SPI can help avoid I2C address conflicts. Pressure readings can also be used for altimeter-style measurements, with the supplier noting ±1 meter or better accuracy and low altitude noise of 0.25 m.
This board includes a built-in 3.3V regulator and level shifting, so it can be used with either 3V or 5V logic microcontrollers. The PCB is also designed in the STEMMA QT form factor, with connectors on both sides for quick solderless I2C integration and easy chaining with compatible STEMMA QT or SparkFun Qwiic accessories.
Use it for room environment monitoring, HVAC and home automation experiments, weather stations, data logging, portable instruments, and maker projects that need pressure-based altitude estimation alongside temperature and humidity sensing.
| Brand | Adafruit |
|---|---|
| Sensor | Bosch BME280 |
| Measurements | Temperature, humidity, barometric pressure |
| Interface | I2C or SPI |
| Logic Compatibility | 3V or 5V logic microcontrollers |
| Board Features | 3.3V regulator, level shifting, STEMMA QT connectors |
| Humidity Accuracy | ±3% RH |
| Pressure Accuracy | ±1 hPa absolute accuracy |
| Temperature Accuracy | ±1.0°C |
For a typical I2C connection, wire your board 3V to VIN, GND to GND, SCL to SCL, and SDA to SDA. With STEMMA QT, this can be done using a compatible cable for quick solderless setup.
Note: no additional package contents, dimensions, or expanded pin mapping were provided in the supplied product data.
This breakout measures temperature, relative humidity, and barometric pressure using the Bosch BME280 sensor. The pressure reading can also be used for altitude estimation in suitable projects.
Yes. The board supports both I2C for simple two-wire connections and SPI for setups where you want to avoid I2C address conflicts between multiple sensors.
Yes. According to the supplier guide, the breakout includes an onboard 3.3V regulator and level shifting, so it can be used with 3V or 5V logic microcontrollers.
Yes, this is the STEMMA QT version of the board. Its STEMMA QT connectors are stated to be compatible with SparkFun Qwiic I2C connectors for solderless connection and chaining with compatible accessories.
The default I2C address is 0x77. The Adafruit guide notes it can be changed to 0x76 by connecting SDO to GND or closing the ADDR jumper on the back, and your code must then use the non-default address.
The supplied product information states humidity accuracy of ±3% RH, barometric pressure accuracy of ±1 hPa absolute, and temperature accuracy of ±1.0°C. It is also described as usable as an altimeter with ±1 meter or better accuracy and low altitude noise of 0.25 m.
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