Adafruit BME280 I2C or SPI Temperature Humidity Pressure Sensor

The board is small and simple to connect. There are many free Python or Perl libraries online that enable easy readings for temperature, pressure, and humidity. Please note that pressure readings require calibration using your elevation. Default output units are metric (as they should be), and can be easily converted using simple formulas. The only thing I didn’t like about the board was the cost from adafruit on Amazon being a little higher (presumably to recover shipping costs).

I am just getting into using sensors with microcontrollers and Raspberry Pi and this was a fun little toy. Had to solder and that turned out ok as a practice piece. Was easy to set up and run using Adafruits resources on the internet.

Perfect for a weather station project.I used Adafruit library and was up and running in no time. Tested both SPI and I2C protocols and both work great. I used them with Arduino uno, mega and mini pro.The only issue I have (reason for 4 stars ) is that very seldomly all the sensors get stuck and report max values. A power reset always fixes the issue.Overall the sensors, temperature, humidity and pressure are very accurate and with good precision.I'm very pleased with Adafruit quality compared to other manufacturers that reminded that you get what you pay for.Note: Make sure you get the right product. Check for adafruit logo (star). See attached picture.

This is an excellent chip with a nice, small form factor. There are plenty if libraries to use and a significant amount of documentation on this chip. I use this with a raspberry pi with no issues.

I wired this up via i2c through my RPi3, and Klipper can see it just fine. I used the sample configuration provided with Klipper. I’m now monitoring my Voron v0.1 chamber temperature just fine. Stemma/Qwiic wires are pretty small gauge (sold separately from Sparkfun) so wiring at the RPi side was a bit tricky, but the Qwiic connection is so convenient.

Not ok for accuracy. The temperature is way off. (a couple degrees C), and takes 15 minutes to settle in once software starts reading measurements. The same for relative humidity - the reading from the device is off by 17%. These readings are compared to a commercial termperature/pressure/humidity sensor (like you would buy at HomeGoods, Home Depot, or Walmart).

Adafruit changed the 2652 design to use the STEMMA QT form factor. I was happy to find the old design here on Amazon, since I had an old application that used the old form factor. Even though the picture clearly shows the old design, and I've bought it from this supplier before, this time it came in the new form factor. The STEMMA QT design is much cheaper elsewhere, so I only overpaid because I was looking for the old design.

The installation was easy and the sensor is very small. I have used 2 or 3 of the same type of sensor from another company, which both have died within the last year. I have decided to try a different company and hope for better results. The noticeable difference with this version from Adafruit is that the voltage in supports 3.3V or 5V and SPI or I2C, which the previous boards I had were only 3.3V over I2C. I have an Arduino Yun which primarily uses 5V, so that could be why the previous sensors died so quickly. (I didn't think to check the voltage on the data line, but I am still feeding the sensors 3.3V.) I'll have to wait and see if this can hold out more than a few months.