K210通过IIC驱动GY906红外测温模块

K210代码：

from machine import I2C
import time
i2c = I2C(I2C.I2C3,freq=100000, scl=28, sda=29)
time.sleep_ms(100)

MLX90614_IIC_ADDR	= const(0x00)
MLX90614_TA			= const(0x06)
MLX90614_TOBJ1 		= const(0x07)
temp=0
class MLX90614:
  def __init__(self,i2c,addr=MLX90614_IIC_ADDR):
    self.addr=addr
    self.i2c=i2c

  def getObjCelsius(self):
        return self.getTemp(MLX90614_TOBJ1)	#Get celsius temperature of the object

  def getEnvCelsius(self):
        return self.getTemp(MLX90614_TA)	#Get celsius temperature of the ambient

  def getObjFahrenheit(self):
        return (self.getTemp(MLX90614_TOBJ1) * 9 / 5) + 32	#Get fahrenheit temperature of the object

  def getEnvFahrenheit(self):
        return (self.getTemp(MLX90614_TA) * 9 / 5) + 32	#Get fahrenheit temperature of the ambient


  def getTemp(self,reg):
        global temp
        temp = self.getReg(reg)*0.02-273.15	#Temperature conversion



  def getReg(self,reg):
    data = self.i2c.readfrom_mem(self.addr,reg,3) #Receive DATA
    time.sleep_ms(100)
    result = (data[1]<<8) | data[0]
    return result
ir = MLX90614(i2c)


while (1):
    ir.getObjCelsius()
    print("temp  %s *C"% (temp))

如果出现如下报错，是因为IIC出问题了：

OSError: [Errno 5] EIO

先检查红外测温传感器与单片机的连接，若还是报错，则修改下面这句代码中的“I2C.I2C3”和“scl=28, sda=29”的引脚。

i2c = I2C(I2C.I2C3,freq=100000, scl=28, sda=29)

I2C.I2C3可修改为：I2C.I2C0，I2C.I2C1，I2C.I2C2