Qwiic cable issue with MLX90640 on Jetson Nano

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1

Hello,

I’m using the SparkFun MLX90640 with a Jetson Nano through the Qwiic cable. The wiring is correct (3.3V, GND, SDA, SCL).

The first time I connected the sensor, i2cdetect -y 1 showed the address 0x33 once. But after that, the address disappeared completely and never came back.

I tried again with the same Qwiic cable and correct pins, but now the MLX90640 is not detected at all.

Could this be a problem with the Qwiic cable, or is it possible that the sensor board was damaged? What is the recommended way to troubleshoot this situation?

Thank you.

2

Swap the Qwiic cable with a known-good Qwiic cable (or use jumper wires). If you don’t have a spare cable, use a multimeter continuity check between the ends (SDA-to-SDA, SCL-to-SCL, 3V3-to-3V3, GND-to-GND).

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