Pi Zero MPU-9250 i2cdetect failures usually stem from wrong voltage, not software

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Developers using the MPU-9250 IMU with a Raspberry Pi Zero often encounter an empty i2cdetect output or damaged GPIO pins due to incorrect power supply wiring. The Pi's GPIO operates at 3.3V, so VCC must be connected to Pin 1 (3.3V) rather than the 5V pins, unless the I2C lines are confirmed to be level-shifted. Once wired correctly and I2C is enabled via raspi-config, a successful setup should show the sensor at address 0x68 on the I2C bus. Common failure states — such as an empty bus, address 0x69, or 'UU' — each point to distinct issues including loose wiring, a high AD0 pin, or a kernel driver conflict respectively. The article notes that garbage sensor values despite a detected address typically indicate power supply noise rather than a software or library problem.

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