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1 |
| -# Seeed_Python_MLX90640 |
| 1 | +# seeed MLX90640 |
| 2 | + |
| 3 | +The MLX90640 is a fully calibrated 32x24 pixels IR array in an industry standard 4-lead TO39 package with digital interface The MLX90640 contains 768 FIR pixels. An ambient sensor is integrated to measure the ambient temperature of the chip and supply sensor to measure the VDD. The outputs of all sensors IR, Ta and VDD are stored in internal RAM and are accessible through I2C. |
| 4 | + |
| 5 | +# Dependencies |
| 6 | + |
| 7 | +This driver depends on: |
| 8 | +- [***grove.py***](https://github.com/Seeed-Studio/grove.py) |
| 9 | + |
| 10 | +This is easy to install with the following command. |
| 11 | + ``` |
| 12 | +curl -sL https://github.com/Seeed-Studio/grove.py/raw/master/install.sh | sudo bash -s - |
| 13 | + ``` |
| 14 | +## Installing from PyPI |
| 15 | + |
| 16 | +On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user: |
| 17 | + |
| 18 | +``` |
| 19 | +pip3 install seeed-python-mlx90640 |
| 20 | +``` |
| 21 | + |
| 22 | +To install system-wide (this may be required in some cases): |
| 23 | + |
| 24 | +``` |
| 25 | +sudo pip3 install seeed-python-mlx90640 |
| 26 | +``` |
| 27 | + |
| 28 | +## Usage Notes |
| 29 | + |
| 30 | +First, Check the corresponding i2c number of the board: |
| 31 | +``` |
| 32 | +(.env) pi@raspberrypi:~ $ ls /dev/i2c* |
| 33 | +/dev/i2c-1 |
| 34 | +``` |
| 35 | + |
| 36 | +Check if the i2c device works properly, 0x33 is the MLX90640 i2c address. |
| 37 | +``` |
| 38 | +
|
| 39 | +pi@raspberrypi:~/Seeed_Python_SGP30 $ i2cdetect -y -r 1 |
| 40 | + 0 1 2 3 4 5 6 7 8 9 a b c d e f |
| 41 | +00: -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 42 | +10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 43 | +20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 44 | +30: -- -- -- 33 -- -- -- -- -- -- -- -- -- -- -- -- |
| 45 | +40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 46 | +50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 47 | +60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| 48 | +70: -- -- -- -- -- -- -- -- |
| 49 | +
|
| 50 | +``` |
| 51 | + |
| 52 | +Next, initialize the sersor object: |
| 53 | + |
| 54 | +```python |
| 55 | +import seeed_mlx90640 |
| 56 | +sensor = seeed_mlx90640.grove_mxl90640() |
| 57 | +``` |
| 58 | + |
| 59 | +## Reading from the Sensor |
| 60 | + |
| 61 | +To read from the sensor: |
| 62 | + |
| 63 | +```python |
| 64 | +Pixel = [0]*801 |
| 65 | +for i in range(0,801): |
| 66 | + Pixel[i] = sensor.getCompensatedPixData(i//32,i%32) |
| 67 | +del Pixel[0:33] |
| 68 | +print(len(Pixel)) #24x32 pixel |
| 69 | +print(Pixel) |
| 70 | +``` |
| 71 | + |
| 72 | +## Contributing |
| 73 | + |
| 74 | +If you have any good suggestions or comments, you can send issues or PR us. |
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