MOD-BME280 SPI

[mink753]

Hello

I recently bought some MOD-BME280 for use in environmental sensing and altitude calculations. I am able to use the sensor with the i2c bus without any issue. I see on the website it says the breakout board supports SPI. However when I examine the datasheet I don't see how to use SPI. Is there a way to use the OLIMEX connector to implement SPI?

Thanks

[LubOlimex]

Only 3-wire SPI is possible since SDO is either connected to VDDIO or to GND. Using CSB, SDI, SDC 3-wire SPI is possible, refer to the schematic:

https://github.com/OLIMEX/MOD-BME280/blob/master/HARDWARE/MOD-BME280-Rev.B/MOD-BME280_RevB.pdf

And also the datasheet of BME280, page 38, table 35:

https://www.olimex.com/Products/Modules/Sensors/MOD-BME280/resources/BME280.pdf