Looking at the BMP 280 shuttle board electrical layout, it is very difficult to read the signals in the provided diagram on page 2 of the BMP 280 Shuttle Board flyer. For example, it looks like three different pins are labelled SDI: 5, 16, 17, two different pins are labelled SDO: 4, 15, and two different pins are labelled SCK: 6 and 18! Can someone please provide the following information? (a) Which of the 28 pins are used when using the BMP280 shuttle board via the I2c interface? A list of the signal names and pin number assignments would be helpful along with noting the required input pin settings to indicate use of the I2C interface. (b) Which of the 28 pins are used when using the BMP280 shuttle board via the SPI interface? A list of the signal names and pin number assignments would be helpful along with noting the required input pin settings to indicate use of the SPI interface. (c) Why are there multiple pins labelled with the same signal name?
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