I am having trouble reading a Omega PX409 serial usb sensor. I have used PuTTY to read the sensor and it returns the PSI immediately. I want to read this PSI in Ignition for a testing application. I have tried a couple ways of writing the script and both have been unsuccessful.
Preformatted text# Same idea as example one, but uses all available parameters.
with system.serial.port(
port = "COM6",
bitRate = system.serial.BIT_RATE_115200,
dataBits = system.serial.DATA_BITS_8,
handshake = system.serial.HANDSHAKE_NONE,
hardwareFlowControl = False,
parity = system.serial.PARITY_NONE,
stopBits = system.serial.STOP_BITS_1) as port:
line = port.readLine(60000)
this only returns empty.
port_name = "COM6"
#Configure the serial port
system.serial.configureSerialPort(
port=port_name,
bitRate=system.serial.BIT_RATE_115200,
dataBits=system.serial.DATA_BITS_8,
handshake=system.serial.HANDSHAKE_NONE,
hardwareFlowControl=False,
parity=system.serial.PARITY_NONE,
stopBits=system.serial.STOP_BITS_1
)
# Try to communicate with the sensor
try:
# Open the serial port
system.serial.openSerialPort(port_name)
# Write the command to the port
system.serial.write(port_name, "P")
# Read the response from the port
read = system.serial.readLine(port_name, 60000, "ASCII")
# Print or handle the read value here
print(read)
except Exception as e:
print("Error in communication with %s: %s" % (port_name, str(e)))
finally:
# Ensure the serial port is closed
system.serial.closeSerialPort(port_name)
this script will give me errors on a unknown source and port time outs. I have tried increasing the time and still nothing is returned.
my PuTTY configurations are here and work perfect.
