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exec failed: GPIO 5 !I2C SCL<br />D2: GPIO 4 !I2C SDA<path> <p>D5: GPIO 14 SPI Clock<br />D6: GPIO 12 SPI MOSI<br />D7: GPIO 13 SPI MISO<br />D8: GPIO 15 SPI CS<path> | <p>Real Time Clock<path> <p> <path> <p>SD card interface<path> <p> <path> | path