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BME280 breakout board e-BoB (160109-1)

Status: Finished
October 5, 2018
in Elektor magazine | January 2017 | Find it here
Little breakout board for the Bosch Sensortec BME280 Environmental sensor supporting I2C and SPI. Selecting the interface is done with 0R jumper resistors.

Connecting SDO to GND results in slave address 0x76 (R4 open, R5 mounted); connecting it to VDDIO results in slave address 0x77 (R4 mounted, R5 open).

The stuffing table below resumes all the options.

The BME280 can be powered from 1.71 V to 3.6 V. Its interface has its own supply pin VDDIO allowing voltages from 1.2 V to 3.6 V. R1 connects VDD to VDDIO. Remove R1 when interfacing the module to levels that are not the same as the supply voltage.
Stuffing table
I2C (0x76) I2C (0x77) SPI
R1 = 0R R1 = 0R R1 = 0R
R2 = 10k R2 = 10k R2 = NC
R3 = 10k R3 = 10k R3 = NC
R4 = NC R4 = 0R R4 = NC
R5 = 0R R5 = NC R5 = NC
R6 = NC R6 = NC R6 = 0R
R7 = 0R R7 = 0R R7 = NC
R8 = NC R8 = NC R8 = 0R

A driver for the BME280 can be found at its Elektor Labs GitHub page.
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