OJIP to Graph.py

import serial
import time
import matplotlib.pyplot as plt

REF_VOLTAGE = 1.1

ser = serial.Serial('EnterSerialPortOfArduinoHere', 74880)

xdataArray = []
ydataArray = []


def measureOJIP():
    ser.flush()
    time.sleep(1)
    ser.write(b'MF')
    for i in range(1100):
        OJIP_bytes = ser.readline()
        decoded_OJIP_bytes = str(
            OJIP_bytes[0:len(OJIP_bytes) - 2].decode("utf-8"))
        dataSplit = [float(s) for s in decoded_OJIP_bytes.split("\t")]
        xdata = dataSplit[0]
        ydata = float(dataSplit[1])
        ydata = ((ydata * REF_VOLTAGE) / 1023)
        xdataArray.append(xdata)
        ydataArray.append(ydata)


measureOJIP()
plt.figure(figsize=(5, 5))
plt.semilogx(xdataArray, ydataArray, label='OJIP',
             color='xkcd:blue', marker=None)
plt.ylabel("Fluorescence (V))")
plt.xlabel("Time (ms)")
plt.xlim(0.04, 1000)
plt.yticks([0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000])
plt.legend(loc='best')
plt.show()