None of them combined the functions for BMP280 in a library capable of using the BME280. Looking into the library situation for the BME280, I found separate libraries Adafruit_BME280, Seed_BME280 and another one BME280_MOD-1022 written by Embedded Adventures. However the library was much more complicated than the other two, I could not find any instructions or examples of use (I subsequently found examples were in the file 'bmp280_support.c', however these were not particularly helpful to me).Īs a result of these factors, I decided to write my own library for the BMP280. This may be my deficiency, rather than theirs. I could not figure our how to use the one produced by the device manufacturer (Bosch Sensortec).

Neither Adafruit nor Seeed provided extended capabilities, although they worked well and were easy to use for basic applications. When starting out with the BMP280, I found 3 different libraries for it: Adafruit_BMP280 Seeed_BMP280 and one called BMP280 from the device manufacturer. I have endeavoured to achieve all of these. Desirably the library should follow any specific guidelines from the device manufacturer, as well as general software good practice. Desirably, the API should be easy for a beginner with simple requirements to get started, while providing for full exploitation of the device capabilities. Library features and capabilitiesĪ library is a piece of software that provides an Application Programming Interface (API) for a programmer to exercise the capabilities of the device, without necessarily having to deal with all the fine-grain details.

It seems to have worked out OK.įeedback, especially any suggestions for improvements, will be appreciated.

To find out which type it is, you have to look at the (miniscule) writing on the sensor itself, or test the device ID byte. Even many of the modules being sold (for example on Ebay and AliExpress) are labelled BME/P280. The hardware for the two device types is fully interchangeable. This raises the question, one library for both, or two separate libraries. There are additional registers and steps needed to read humidity, applicable to the BME280 only. The BME280 is 'backward-compatible' with the BMP280 - that is, all the registers and the steps needed to read pressure and temperature from the BME280 are the same as those used for the BMP280. Subsequently I had a need to use a BME280, which adds humidity measurement to the pressure and temperature capability of the BMP280. That project is not yet finished, but I think the library is ready to share with others. It 'happened' as a side-effect of a project I started that uses a BMP280.

Breadboard library for proteus