import serial
import pandas as pd

if __name__ == "__main__":

    try:
        with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PARITY_NONE) as ser:
            x = ser.read()          # read one byte
            s = ser.read(10)        # read up to ten bytes (timeout)
            line = ser.readline()   # read a '\n' terminated line
            print(x)
            print(s)
            print(line)
            ser.write(b'B')
            while True:
                x = ser.read()
                b = ser.read(100) 
                line = ser.readline()
                print(b)
                if 'Buffer Completed' in b.decode("utf-8"):
                    ser.write(b'S')
                    while True:
                        x = ser.read()
                        s = ser.read(100) 
                        line = ser.readline()
                        print(s)
                        if 'Sample Completed' in s.decode("utf-8"):
                            ser.write(b'P')
                            while True:
                                x = ser.read()
                                r = ser.read(100) 
                                line = ser.readline()
                                print(r)
                                if 'RESULT' in r.decode("utf-8") or 'REND' in r.decode('utf-8'):
                                    print(r)
                                    break
                            break
                    break
    except serial.serialutil.SerialException:
        print("connect device!")
    except:
        print("error!")