47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
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#!/usr/bin/python
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import serial
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import RPi.GPIO as GPIO
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import time
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import random
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#Open serial port
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ser = serial.Serial('/dev/ttyUSB0',baudrate=9600,timeout =1)
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GPIO.setmode(GPIO.BCM)
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# init list with pin numbers
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pinList = [17]
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# loop through pins and set mode and state to 'high'
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for i in pinList:
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GPIO.setup(i, GPIO.OUT)
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#text file for saving the reading
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file_path = '/home/pi03/TRI_reading.txt'
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try:
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while True:
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#Read ASCII data from serial port
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data = ser.readline().decode('ascii').strip()
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if data:
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try:
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reading = (int(data[3:8],16)-160)*0.3
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print("Received:", data, ":", data[3:8], "=", int(data[3:8],16),":",round(reading))
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#write to file
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with open(file_path, 'w') as file:
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file.write(str(round(reading)))
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if reading >50:
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GPIO.output(17, GPIO.LOW)
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#print ("ON")
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else:
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GPIO.output(17, GPIO.HIGH)
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#print ("OFF")
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except :
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os.putenv('TRI_reading', 'no_data')
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except KeyboardInterrupt:
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#Close serial port on Crt+C
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ser.close()
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#print ("Quit")
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# Reset GPIO settings
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GPIO.cleanup()
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