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SPI is a low-level 3 or 4 wire serial bus interface with clock (SCLK), data in (MISO) and data out (MOSI). The fourth wire is a Slave Select to uniquely select a device on the bus. This signal is usually active-low. Slave Select, Chip Select, CS#, SS# stand for the same function, typically. Be sure to check the datasheet, though. The SPI bus is a *de facto* standard lacking the formal specification.

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How does the serial data input SDI for the MAX31856 (thermocouple to digital converter) works?

I want to communicate with a MAX31856 using SPI. Unfortunately, I have a basic understanding of electronics and only used SPI communication once. … Briefly, the thermocouple sensor (MAX31856) is connected via SPI to Arduino and the latter is connected to a computer. The temperature is read using LabView and the Linx Makerhub add-on. …
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