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我正试图让我的 us-sensor 与 arduino 一起工作。我已经在普通的 arduino-IDE 中做到了这一点，但现在我需要它在 python 中用于项目。我得到的测量距离始终为 0。如果有人知道如何修复它会很棒:)。

到目前为止，这是我的代码：

import time
import pyfirmata

port = "COM3"
board = pyfirmata.Arduino(port)
it = pyfirmata.util.Iterator(board)
it.start()

trig_pin = 9
echo_pin = 10
duration = ""
Pdistance = ""
distance = ""

while True:
   board.digital[trig_pin].write(0)
   time.sleep(0.002)
   board.digital[trig_pin].write(1)
   time.sleep(0.01)
   board.digital[trig_pin].write(0)
   time.sleep(0.01)
   board.digital[echo_pin].write(1)
   end = 0
   start = 0
   while board.digital[echo_pin].write(0):
      start = time.time()
   while board.digital[echo_pin].write(1):
      end = time.time()
   duration = end - start
   distance = duration * 0.034 / 2
   print("Measured Distance: ")
   print(distance)
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