medium10 pts · first answer countsi2cdebugging

I2C device not responding

Your I2C sensor always returns NACK on its address. Which is the most likely first thing to check?

A.The UART baud rateB.Whether the CPU has an FPUC.The size of the stackD.The 7-bit address format (some datasheets show it shifted as 8-bit) and the pull-up resistors on SDA and SCL

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