2 years, 7 months ago.

Hi, What does (CSB, Vcore, Vio) mean on BME280 pin assignment ?

I plugged the BME280 on an STM32 nucleo F401RE mbed µc and ran the hello BME program. I use pins PB_9, PB_8 as data and clock for I2C I allways get as a return: 0.05 degC, 1202.08 hPa, 0.00 % 0.05 degC, 1202.08 hPa, 0.00 % 0.05 degC, 1202.08 hPa, 0.00 % 0.05 degC, 1202.08 hPa, 0.00 % could you help me ? thanks, Philippe

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2 years, 7 months ago.

Check the datasheet on the BME component page. It tells you that CSB is the SPI ChipSelect pin, which should be pulled high on power-up when you want to use the device in I2C mode. VCore and Vio are the supply voltages for the device core and its I/O pins.