source: ETALON/BPM/read_position.py @ 790

import serial

#if doesn't work, try :
#sudo chmod a+rw /dev/ttyS0
#sudo stty crtscts -F /dev/ttyS0
#                        on a terminal

def test():
        return([3.1415,1,2,3])

def read_vertical_position():  
    output = "/dev/ttyS0"
    fichier = open(output, "w")
    fichier.write("\x08")
    fichier.close()
    ser = serial.Serial(port="/dev/ttyS0")
    #print("connected to :" + ser.portstr)
    A = ser.readline()
    ser.close()
    #print(A)
    X_Y_Z_unit_nb = []
    a = ""
    for i in range(2,len(A)):
        if (A[i] == " ") :
            a = ""
        elif (A[i] == ";"):
            #print(a)
            if a != "":
                X_Y_Z_unit_nb.append(a)
            a = ""
        elif A[i] == "m" and A[i+1] == "m":
            X_Y_Z_unit_nb.append("mm")
        elif A[i] == "I" and A[i+1] == "n"and A[i+2] == "c"and A[i+3] == "h":
            X_Y_Z_unit_nb.append("inch")
        else :
            a += A[i]
    return(X_Y_Z_unit_nb)


print(read_vertical_position())