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Validate serial reading
Non-blocking read on a subprocess.PIPE in pythonHow to read/process command line arguments?How do you read from stdin?How to read a file line-by-line into a list?Processing / Reading Serial Port Data Streams Crashing ProgramHow to read a large file, line by line, in PythonHow to read a text file into a string variable and strip newlines?Why is reading lines from stdin much slower in C++ than Python?SerialPort.BaseStream.ReadAsync drops or scrambles bytes when reading from a USB Serial PortMissing bytes in io.Reader with Serial communication
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I'm currently trying to read a serialport and the data is sometimes "corrupted".
I am expecting data like this
['CPS', '0', 'CPM', '11', 'uSv/hr', '0.06', 'SLOW']
The first reading after opening the serial port is always
['x00']
then reading data is fine for a unknown time, until the serialport delivers somethin like this
['CPS', '0', 'CPM', '21', 'uSv/hr', 'x000.11', 'SLOW']
I already tried to make sure the reading is correct by
this, rather ugly, condition checking:
serialData = serialConnection.readline()
serialData = "".join(serialData.split())
serialList = serialData.split(",")
if (len(serialList) < 7 or serialList[5][0] == "\"
or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
else:
uSvH = float(serialList[5])
So I'm checking whether the read data is the correct size(seven entrys), the first entry always has to be CPS and when a x* is recieved instead of a float it sets the reading to a default value.
But somehow this fails when a corrupt reading occurs.
Is there a better way to sanitize the reading or make sure the data that is received is fine?
python serial-port
asked Mar 24 at 20:49
r4ptorr4ptor
2315
add a comment |
I'm currently trying to read a serialport and the data is sometimes "corrupted".
I am expecting data like this
['CPS', '0', 'CPM', '11', 'uSv/hr', '0.06', 'SLOW']
The first reading after opening the serial port is always
['x00']
then reading data is fine for a unknown time, until the serialport delivers somethin like this
['CPS', '0', 'CPM', '21', 'uSv/hr', 'x000.11', 'SLOW']
I already tried to make sure the reading is correct by
this, rather ugly, condition checking:
serialData = serialConnection.readline()
serialData = "".join(serialData.split())
serialList = serialData.split(",")
if (len(serialList) < 7 or serialList[5][0] == "\"
or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
else:
uSvH = float(serialList[5])
So I'm checking whether the read data is the correct size(seven entrys), the first entry always has to be CPS and when a x* is recieved instead of a float it sets the reading to a default value.
But somehow this fails when a corrupt reading occurs.
Is there a better way to sanitize the reading or make sure the data that is received is fine?
python serial-port
asked Mar 24 at 20:49
r4ptorr4ptor
2315
add a comment |
I'm currently trying to read a serialport and the data is sometimes "corrupted".
I am expecting data like this
['CPS', '0', 'CPM', '11', 'uSv/hr', '0.06', 'SLOW']
The first reading after opening the serial port is always
['x00']
then reading data is fine for a unknown time, until the serialport delivers somethin like this
['CPS', '0', 'CPM', '21', 'uSv/hr', 'x000.11', 'SLOW']
I already tried to make sure the reading is correct by
this, rather ugly, condition checking:
serialData = serialConnection.readline()
serialData = "".join(serialData.split())
serialList = serialData.split(",")
if (len(serialList) < 7 or serialList[5][0] == "\"
or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
else:
uSvH = float(serialList[5])
So I'm checking whether the read data is the correct size(seven entrys), the first entry always has to be CPS and when a x* is recieved instead of a float it sets the reading to a default value.
But somehow this fails when a corrupt reading occurs.
Is there a better way to sanitize the reading or make sure the data that is received is fine?
python serial-port
asked Mar 24 at 20:49
r4ptorr4ptor
2315
I'm currently trying to read a serialport and the data is sometimes "corrupted".
I am expecting data like this
['CPS', '0', 'CPM', '11', 'uSv/hr', '0.06', 'SLOW']
The first reading after opening the serial port is always
['x00']
then reading data is fine for a unknown time, until the serialport delivers somethin like this
['CPS', '0', 'CPM', '21', 'uSv/hr', 'x000.11', 'SLOW']
I already tried to make sure the reading is correct by
this, rather ugly, condition checking:
serialData = serialConnection.readline()
serialData = "".join(serialData.split())
serialList = serialData.split(",")
if (len(serialList) < 7 or serialList[5][0] == "\"
or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
else:
uSvH = float(serialList[5])
So I'm checking whether the read data is the correct size(seven entrys), the first entry always has to be CPS and when a x* is recieved instead of a float it sets the reading to a default value.
But somehow this fails when a corrupt reading occurs.
Is there a better way to sanitize the reading or make sure the data that is received is fine?
python serial-port
python serial-port
asked Mar 24 at 20:49
r4ptorr4ptor
2315
asked Mar 24 at 20:49
r4ptorr4ptor
2315
asked Mar 24 at 20:49
r4ptorr4ptor
2315
asked Mar 24 at 20:49
r4ptorr4ptor
2315
asked Mar 24 at 20:49
r4ptorr4ptor
2315
2315
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Looks like I was thinking too complicated. A simple try except statement finished the job.
if(len(serialList) == 7):
try:
uSvH = float(serialList[5])
except ValueError:
uSvH = 0.1
if (len(serialList) < 7 or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
Now the script passes some random readings.
answered Mar 25 at 14:22
r4ptorr4ptor
2315
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Looks like I was thinking too complicated. A simple try except statement finished the job.
if(len(serialList) == 7):
try:
uSvH = float(serialList[5])
except ValueError:
uSvH = 0.1
if (len(serialList) < 7 or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
Now the script passes some random readings.
answered Mar 25 at 14:22
r4ptorr4ptor
2315
add a comment |
Looks like I was thinking too complicated. A simple try except statement finished the job.
if(len(serialList) == 7):
try:
uSvH = float(serialList[5])
except ValueError:
uSvH = 0.1
if (len(serialList) < 7 or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
Now the script passes some random readings.
answered Mar 25 at 14:22
r4ptorr4ptor
2315
add a comment |
Looks like I was thinking too complicated. A simple try except statement finished the job.
if(len(serialList) == 7):
try:
uSvH = float(serialList[5])
except ValueError:
uSvH = 0.1
if (len(serialList) < 7 or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
Now the script passes some random readings.
answered Mar 25 at 14:22
r4ptorr4ptor
2315
Looks like I was thinking too complicated. A simple try except statement finished the job.
if(len(serialList) == 7):
try:
uSvH = float(serialList[5])
except ValueError:
uSvH = 0.1
if (len(serialList) < 7 or serialList[0] != "CPS" or serialList[2] != "CPM"):
uSvH = 0.1
Now the script passes some random readings.
answered Mar 25 at 14:22
r4ptorr4ptor
2315
answered Mar 25 at 14:22
r4ptorr4ptor
2315
answered Mar 25 at 14:22
r4ptorr4ptor
2315
answered Mar 25 at 14:22
r4ptorr4ptor
2315
2315
add a comment |
add a comment |
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