[FIXED] Serial port permission error, and 'unexpected keyword argument' related to 'Systole' package when plotting raw PPG time series

Issue

I'm trying to assess if an Oximeter plugged in via USB is correctly collecting heart rate data. I am using the Systole package, and some pre-writtend code sourced here (Scroll down to Recording PPG Signal :Recording PPG Signal code

I am having 2 errors, the first is:SerialException: could not open port 'COM4': PermissionError(13, 'Access is denied.', None, 5)

And the second is:TypeError: plot_raw() got an unexpected keyword argument 'show_heart_rate'

The script I am trying to run:

from systole.recording import Oximeter


#Option for usin a simulated device, which I am not doing

    from systole import serialSim

 # Use a USB device  
import serial
ser = serial.Serial("COM4")  # Use this line for USB recording

#Plotting

oxi = Oximeter(serial=ser).setup().read(duration=10)
oxi.plot_raw(show_heart_rate=True, figsize=(13, 8))

Below is my desired output:

Solution

like I said in a comment the error 'COM4': PermissionError(13, 'Access is denied.', None, 5) means that the COM port is already taken by another program.

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I think that the second error is because of this line:

oxi = Oximeter(serial=ser).setup().read(duration=10)

according to systole api documentation you are supposed to do:

# ................................
oxi = Oximeter(serial=ser)
oxi.setup()
oxi.read(duration=10)
# ................................
oxi.plot_raw(show_heart_rate=True, figsize=(13, 8))

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systole api documentation

Answered By - Omer Dagry