(If that command is not found do 'sudo apt-get install i2c-tools'.) Once the device is physically installed and i2c is enabled verify that the SOC can see it by opening a terminal and running. (A pretty good guide on that is here- )įinally you'll need to enable the pi camera if you wish to run the 'mlxview' example that's included with the mlx90621 user space driver. You'll also need to make sure that i2c is enabled for your Raspberry Pi. Vcc -> Pin 1 (via 1n4001 diode to drop voltage).So it's prudent to connect a small rectifier diode in series with th positive power (a 1n4001 works nicely.) Other than that, wiring is the same as any I2C device. They will work from 3.3V but prefer a bit lower voltage. You can see in the picture of the thermo-data overlaying the camera image that we get a 'strip' of temperature data that runs either horizontally or vertically across the middle of the image depending on orientation.Īside from this one drawback, they are pretty awesome little sensors. The only drawback is that the sensors are designed for 'production line' so their 16x4 aspect ratio is not ideal. The MLX sensors are very affordable and work well. The MLX90620 and MLX 90621 are 16x4 remote temperature sensors.
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