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How can I set the SPI address for the Adafruit iMAX31865 RTD
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How can I set the SPI address for the Adafruit iMAX31865 RTD

by bmihura on Mon Jun 14, 2021 12:07 pm

I want to connect three of these to one Arduino, but I don't see how I can set their SPI address.

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Re: How can I set the SPI address for the Adafruit iMAX31865

by adafruit_support_carter on Mon Jun 14, 2021 12:10 pm

SPI does not uses addresses. Instead, each device needs a dedicated Chip Select (CS) pin. The CLK, SDO, and SDI pins would be shared.

The pins used for CS can just be any available GPIO pins.

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Re: How can I set the SPI address for the Adafruit iMAX31865

by bmihura on Mon Jun 14, 2021 4:30 pm

Thanks, that makes sense.

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Re: How can I set the SPI address for the Adafruit iMAX31865

by adafruit_support_carter on Mon Jun 14, 2021 5:40 pm

Sure. No prob. I2C on the other hand does use addresses. I2C has shared clock (SCL) and data (SDA) lines. Each device on the I2C bus needs to have a unique address.

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