I2C Bringup Diagnostician Use this skill when the sensor or device should be on the bus, but the I2C path is still not trustworthy. Resources - - ordered I2C fault-isolation workflow - - what to do when the scanner finds the device but the library still fails - - ESP32-family and board-specific caveats - - Uno R4 family board notes when relevant When to Use Use this skill when the request includes: - "no I2C devices found" - scanner finds the address but the library cannot initialize the device - two I2C devices conflict or one disappears - ESP32 pin, bus, or second-channel confusion - pull-u…