read_one can not be used

[MornNighter]

As newest Firmware is utilized, the read_one instruction can not be used, as it will get error:

return self.read_floats(1)[0]
IndexError: index 0 is out of bounds for axis 0 with size 0

my code is like:

from libarc1 import ArC1
arc1 = ArC1('com3')
arc1.select(1, 1)
arc1.pulse_active(2.5, 100e-6)
arc1.read_one(1, 1)

[foucault]

Hello! I'm afraid I cannot replicate the problem. I tried the following script on two different Windows 10 computers and a Linux computer

from libarc1 import ArC1

arc1 = ArC1('COM3') # or /dev/ttyXXX for Linux
arc1.select(1, 1)
arc1.pulse_active(2.5, 100e-6)
print(arc1.read_one(1, 1))

arc1.close()

Returns 1289594200.0 or thereabouts with (1, 1) being an open crosspoint. Have you ensured you have the latest mbed drivers for Windows? It shouldn't really be necessary but Windows Update had messed up with serial port drivers before. I would also try a different USB port if possible. Any more information you can provide is welcome.

[MornNighter]

Hello! I'm afraid I cannot replicate the problem. I tried the following script on two different Windows 10 computers and a Linux computer

from libarc1 import ArC1

arc1 = ArC1('COM3') # or /dev/ttyXXX for Linux
arc1.select(1, 1)
arc1.pulse_active(2.5, 100e-6)
print(arc1.read_one(1, 1))

arc1.close()

Returns 1289594200.0 or thereabouts with (1, 1) being an open crosspoint. Have you ensured you have the latest mbed drivers for Windows? It shouldn't really be necessary but Windows Update had messed up with serial port drivers before. I would also try a different USB port if possible. Any more information you can provide is welcome.

Hello! As you said, I reinstalled the driver, and it work now!
This problem may be associated with Windows Update.
Thank you very much!