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44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
#!/usr/bin/python3 -u
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# Simple Script to generate fix rate ASCII frames and send it througth a serial port
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# pyserial library have to be installed installed first (https://github.com/pyserial/pyserial)
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# For testing, you can use socat to get virtual serial ports :
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# socat -d -d pty,raw,echo=0 pty,raw,echo=0
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###
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import serial
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import sys,time
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from datetime import datetime,timedelta
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import random
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### Parameters ###
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channels_nb=3 #How many channnel do you want
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port="/dev/ttyUSB0" #Serial port used by this script to output data
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ser_speed=9600 #Serial port speed
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period_s=1 #Sample Period (second)
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period_ms=0 #Sample Period (millisecond, can be combined with period_s)
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try:
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ser=serial.Serial(port,ser_speed,rtscts=0)
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next_time=datetime.now()+timedelta(seconds=period_s,microseconds=period_ms*1000)
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while True:
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data=""
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for i in range(channels_nb):
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data=data+","+str(round(random.uniform(-10000,10000),0))
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timeStr=datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3]
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msg=timeStr+data+"\n"
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print(msg)
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ser.write(msg.encode())
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time.sleep((next_time-datetime.now())/timedelta(seconds=1))
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next_time= next_time+timedelta(seconds=period_s,microseconds=period_ms*1000)
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except Exception as msg:
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raise
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finally:
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ser.close()
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