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194 lines
5.6 KiB
Python
194 lines
5.6 KiB
Python
from serial import Serial
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from math import inf
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import sys
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import binascii
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def crap_to_number(num, unit, acdc):
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number_str = ""
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if(num[0]&0x10):
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number_str+="-"
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num[0] &= 0xEF
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for elem in num:
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if(elem & 0x10 != 0):
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number_str+="."
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switch={
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0xcf:"9",
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0xef:"8",
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0x8a:"7",
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0xe7:"6",
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0xc7:"5",
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0x4e:"4",
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0x8f:"3",
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0xad:"2",
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0x0a:"1",
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0xeb:"0",
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0x61:"L",
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0x00:" "
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}
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number_str+=switch.get(elem&0xEF, "-")
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if (unit[0] & 0x1):
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number_str+="µ"
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if (unit[0] & 0x2):
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number_str+="n"
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if (unit[0] & 0x4):
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number_str+="k"
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if (unit[1] & 0x1):
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number_str+="m"
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if (unit[1] & 0x2):
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number_str+="%"
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if (unit[1] & 0x4):
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number_str+="M"
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if (unit[2] & 0x1):
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number_str+="F"
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if (unit[2] & 0x2):
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number_str+="Ω"
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if (unit[3] & 0x1):
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number_str+="A"
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if (unit[3] & 0x2):
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number_str+="V"
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if (unit[3] & 0x4):
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number_str+="Hz"
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if (unit[4] & 0x2):
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number_str+="°C"
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if (unit[4] & 0x1):
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number_str+="°F"
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if(acdc&0xb == 0x0a):
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number_str+=" DC"
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if(acdc&0xb == 0x09):
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number_str+=" AC"
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return number_str
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def read_peaktech( ser ):
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line = ser.read_until( b'\xf1' )
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#print(binascii.hexlify(line))
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good=1
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if(len(line) == 15):
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for i in range(0, 0xf):
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if i+1 != ((line[i]&0xF0)>>4):
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good=0
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else:
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line = ser.read_until( b'\xf1' )
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bytearr = bytearray(line)
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if(good==1):
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for i in range(0, 0xf):
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bytearr[i] = (bytearr[i] & 0x0F)
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#print(binascii.hexlify(bytearr))
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acdc = bytearr[0]
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num = []
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num.append((bytearr[1]<<4) | bytearr[2])
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num.append((bytearr[3]<<4) | bytearr[4])
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num.append((bytearr[5]<<4) | bytearr[6])
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num.append((bytearr[7]<<4) | bytearr[8])
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unit = []
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unit.append(bytearr[9] )
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unit.append(bytearr[10])
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unit.append(bytearr[11])
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unit.append(bytearr[12])
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unit.append(bytearr[13])
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#print(unit[0])
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#print(unit[1])
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#print(unit[2])
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#print(unit[3])
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#print(unit[4])
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#if line[0:2] == b'\x1C\x20':
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# print("Ohm")
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#if line[0:2] == b'\x18\x20':
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# print("beep")
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#if line[0:1] == b'\x1e':
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# print("V DC")
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#if line[0:1] == b'\x1d':
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# print("V AC")
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#if line[0:2] == b'\x1c\x2e':
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# print("Hz")
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#if line[0:2] == b'\x18\x2e':
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# print("Temp")
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return crap_to_number(num, unit, acdc)
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#if (len(line) == 14) and (line[5] == 0x20):
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# try:
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# value = float( line[0:5].decode("ascii") )
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# if line[6] == 0x31:
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# value /= 10
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# elif line[6] == 0x32:
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# value /= 100
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# elif line[6] == 0x33:
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# value /= 1000
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# elif line[6] == 0x34:
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# value /= 10000
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# except:
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# value = inf
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# if (line[9] & 0x80) != 0:
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# prefix = "µ"
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# elif (line[9] & 0x40) != 0:
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# prefix = "m"
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# elif (line[9] & 0x20) != 0:
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# prefix = "k"
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# elif (line[9] & 0x20) != 0:
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# prefix = "M"
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# else:
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# prefix = ""
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# if (line[10] & 0x80) != 0:
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# unit = "V"
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# elif (line[10] & 0x40) != 0:
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# unit = "A"
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# elif (line[10] & 0x20) != 0:
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# unit = "Ω"
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# elif (line[10] & 0x10) != 0:
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# unit = "hFE"
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# elif (line[10] & 0x08) != 0:
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# unit = "Hz"
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# elif (line[10] & 0x04) != 0:
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# unit = "F"
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# elif (line[10] & 0x02) != 0:
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# unit = "℃"
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# elif (line[10] & 0x01) != 0:
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# unit = "℉"
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# else:
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# unit = ""
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# print( f"{value}{prefix}{unit}" )
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def read():
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ser = Serial("/dev/ttyUSB0", 2400)
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res = read_peaktech(ser)
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try:
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res = int(res)
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except:
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res = 0
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return res
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if __name__ == "__main__":
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port = "/dev/ttyUSB0"
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if len(sys.argv) > 1:
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port = sys.argv[1]
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try:
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with Serial( port , 2400) as ser:
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print(ser.name)
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while True:
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print(read_peaktech(ser))
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except KeyboardInterrupt:
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pass
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except Exception as ex:
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print( "Exception:", ex )
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