树莓派红外测温

https://blog.csdn.net/Hao_ge_666/article/details/117170782

 

 

 

 

接好线之后

首先安装IIC库（这个一般树莓派操作系统自带）

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1	sudo apt install i2c-tools

　　再装专门为python的smbus

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1	sudo apt install python-smbus

　　安完上面两个，就可以打开IIC

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1	sudo raspi-config

　　之后就可以查看模块的地址了（下面代码如果运行不了，自己加管理员权限sudo）

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1	i2cdetect -y -a 1

　　如果树莓派SDA和SCL接的是SDA.1和SCL.1，那么模块地址就是0*5a，如图

 这样就说明检测到了模块，地址为0*5a

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import smbus from time import sleep    class MLX90614():        MLX90614_RAWIR1=0x04     MLX90614_RAWIR2=0x05     MLX90614_TA=0x06     MLX90614_TOBJ1=0x07     MLX90614_TOBJ2=0x08        MLX90614_TOMAX=0x20     MLX90614_TOMIN=0x21     MLX90614_PWMCTRL=0x22     MLX90614_TARANGE=0x23     MLX90614_EMISS=0x24     MLX90614_CONFIG=0x25     MLX90614_ADDR=0x0E     MLX90614_ID1=0x3C     MLX90614_ID2=0x3D     MLX90614_ID3=0x3E     MLX90614_ID4=0x3F        comm_retries = 5     comm_sleep_amount = 0.1        def __init__(self, address=0x5a, bus_num=1):         self.bus_num = bus_num         self.address = address         self.bus = smbus.SMBus(bus=bus_num)        def read_reg(self, reg_addr):         err = None         for i in range(self.comm_retries):             try:                 return self.bus.read_word_data(self.address, reg_addr)             except IOError as e:                 err = e                 #"Rate limiting" - sleeping to prevent problems with sensor                 #when requesting data too quickly                 sleep(self.comm_sleep_amount)         #By this time, we made a couple requests and the sensor didn't respond         #(judging by the fact we haven't returned from this function yet)         #So let's just re-raise the last IOError we got         raise err        def data_to_temp(self, data):         temp = (data*0.02) - 273.15         return temp        def get_amb_temp(self):         data = self.read_reg(self.MLX90614_TA)         return self.data_to_temp(data)        def get_obj_temp(self):         data = self.read_reg(self.MLX90614_TOBJ1)         return self.data_to_temp(data)       if __name__ == "__main__":     sensor = MLX90614()     print(sensor.get_amb_temp())     print(sensor.get_obj_temp())