有沒有更好的方法來平均兩個溫度傳感器輸入？

Question

我正在為我的汽車建造一個頂置控制台。 我想使用來自兩個溫度傳感器的平均讀數顯示室外溫度。 我目前正在使用 Timo 的庫，並且能夠從每個傳感器中檢索溫度。 當我嘗試平均或轉換臨時值時，除了閃爍的光標外，運行代碼時沒有任何反應。 我是python的新手。

我嘗試調整我的定義，輸入語句的順序，我已將語句的位置從 if 語句內部更改為外部。 希望它是我錯過的東西。 如果我的問題格式不正確，我會提前道歉。

import os
import time
import serial
from w1thermsensor import W1ThermSensor

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

#---------------------------------------------------------
#  Define the function to convert Celsius to Fahrenheit
#---------------------------------------------------------

def CelsiusToFahrenheit(TempCelsius):
 TempFahrenheit = ((TempCelsius*9)/5) + 32
 return TempFahrenheit

#----------------------------------------------------------
#  Define function to Average Outside Temperature in Fahrenheit
#----------------------------------------------------------

def OutsideTempAvg(A, B):
  OutsideTemp = (A + B)/2
  return OutsideTemp

#----------------------------------------------------------
#  Set Pointer to W1ThermSensor object
#----------------------------------------------------------

TmpSensor = W1ThermSensor()

#----------------------------------------------------------
#  Define Sensors by ID
#----------------------------------------------------------

Fsensor = '03079779c963'
Rsensor = '03159779fe5a'
Isensor = '030797799182'

#----------------------------------------------------------
#  Loop Through Available Sensors Identify and Assign 
#----------------------------------------------------------
while True:

    for TmpSensor in W1ThermSensor.get_available_sensors():
        CurSensorID = TmpSensor.id
        CurTempC = round(float(TmpSensor.get_temperature()),1)

        if CurSensorID == Fsensor:
            FtempC = CurTempC
        elif CurSensorID == Rsensor:
            RtempC = CurTempC
        elif CurSensorID == Isensor:
            ItempC = CurTempC
        else:
            print("Unexpected Sensor = " + CurSensorID)
            print("Temp = " + str(FtempC))
            print("Temp = " + str(RtempC))
            print("Temp = " + str(ItempC))

#----------------------------------------------------------------
#  Average and Convert Celsius to Fahrenheit
#----------------------------------------------------------------

            OtempC = round(float(OutsideTempAvg(FtempC, RtempC)))
            OtempF = round(float(CelsiusToFahrenheit(OtempC)))
            FtempF = round(float(CelsiusToFahrenheit(FtempC)))
            RtempF = round(float(CelsiusToFahrenheit(RtempC)))
            ItempF = round(float(CelsiusToFahrenheit(ItempC)))

#-----------------------------------------------------------------
#  Print for testing - Final will be sent to HMI display over Serial
#------------------------------------------------------------------     

            print("Outside Temperature = " + str(OtempF) + " Fahrenheit")
            print("Inside Temperature = " + str(ItempF) + " Fahrenheit")

#---------------------------------------------------------------------
#  Reset time - Final will be 5 minutes
#----------------------------------------------------------------------

    time.sleep(5.0)

我希望能夠打印來自每個傳感器的 C 和 F 讀數以及其中兩個（Fsensor 和 Rsensor）的平均值。 最終我會將結果從 Pi 的串行接口發送到 HMI LCD。

Answer 1

我認為你有縮進的問題：

while True:
    for sensor in W1ThermSensor.get_available_sensors():
        if some_condition:
            pass
        elif some_other_condition:
            pass
        else:  # unreal case just to handle all possible cases
            print('this is not printed when everything is ok')

            calculcate1()  # this function is called only if above is printed!

    calculate2()  # <-- move all calculation to the same level as "for" loop.

邊注：

• Python 允許您隨時初始化變量，但您有責任在訪問之前初始化變量！ 想象 Rsensor 在“for”循環中不可用，您的 RtempC 將永遠不會被初始化。 為了解決它 - 只需提前創建變量。

Answer 2

你是完全正確的，這是我想出的。

while True:

    for TmpSensor in W1ThermSensor.get_available_sensors():
        CurSensorID = TmpSensor.id
        CurTempC = round(float(TmpSensor.get_temperature()),1)
        CurTempF = round(float(TmpSensor.get_temperature(W1ThermSensor.DEGREES_F)),1)

        if CurSensorID == Fsensor:
            FtempC = CurTempC
            FtempF = CurTempF
#            print("F-Temp = " + str(FtempC) + " C" + ", " + str(FtempF) + " F")
        elif CurSensorID == Rsensor:
            RtempC = CurTempC
            RtempF = CurTempF
#            print("R-Temp = " + str(RtempC) + " C" + ", " + str(RtempF) + " F")
        elif CurSensorID == Isensor:
            ItempC = CurTempC
            ItempF = round(float(CurTempF))
#            print("I-Temp = " + str(ItempC) + " C" + ", " + str(ItempF) + " F")
        else:
            print("Unexpected Sensor = " + CurSensorID)





#----------------------------------------------------------------
#  Average and Convert Celsius to Fahrenheit
#----------------------------------------------------------------

    OtempC = round(float(OutsideTempAvg(FtempC, RtempC)))
    OtempF = round(float(OutsideTempAvg(FtempF, RtempF)))

#-----------------------------------------------------------------
#  Print for testing - Final will be sent to HMI display over Serial
#------------------------------------------------------------------     

    print("Outside Temperature = " + str(OtempF) + " Fahrenheit")
    print("Inside Temperature = " + str(ItempF) + " Fahrenheit")
#---------------------------------------------------------------------
#  Reset time - Final will be 5 minutes
#----------------------------------------------------------------------

    time.sleep(60.0)