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Error when a different device is connected to the SPI bus #29

@pedrorovi

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@pedrorovi

Hello,
I am working with some BMEs and de SD Card in the same bus, to use them with BSEC.
BMEs working as expected, but SD no... However, if I removed the BMEs from the bus, isolating the SD, it works.
With the logic analyzer, I can see that MISO is 0 or 1, depending on BMEs power supply. If there are powered, MISO is 1, if not, 0.
Someone with similar problems?

Update:
Another problem with I2C.
I use a tca9548a to select between BMEs and other sensors. I can detect a BME if I connect it directly between the MUX and the microcontroller. But, I cannot detect it when it is connected to one MUX channel, whereas the rest of the sensors works as expected.

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