Problem with MLX90640

Sensors Distance
1

Hi Community,

We ordered a few of the MLX90640 (wide) breakout boards but 3 seem to be broken by now. We connected them to a Raspberry Pi Zero via I2C but the boards stopped responding shortly after setup and we also cannot connect to any other device via I2C as soon as this happens and we need to disconnect the MLX completely to get a signal of the other devices via I2C.

Is this a common issue or has someone experienced this before?

2

We’ve seen this before, sometimes the sensors metal which is connected to ground can develop a short to the SDA or SCL trace on the board. One thing you can try is desoldering the sensor can from the board and resoldering it with a small gap between the sensor can and the board, that seems to fix the issue permanently.