''None'' response.

[yosh101]

I am trying to read the rpm of motor, which is actually connected to VESC 4 on firmware version 5. Hereby I am using PyVESC method to send the message from Jetson to VESC. With PyVESC, it send the message to VESC, which RPM or/and Current it should give to the VESC in order to get the desired rpm from the motor. Below you can see this in the code. But, i am not able to read the return value which gives motor. Here, I get "None".

import pyvesc
import serial
import time
import datetime
from pyvesc import GetValues, SetRPM, SetCurrent, SetRotorPositionMode, GetRotorPosition

port_object = serial.Serial("/dev/ttyACM0",115200, timeout=0.1)


message = pyvesc.SetRPM(10000)
cumessage = pyvesc.SetCurrent(10000)
packet = pyvesc.encode(message)
cupacket = pyvesc.encode(cumessage)


while True:
    data = ''
    port_object.write(packet)
    port_object.write(cupacket)
    print("data; ", port_object.in_waiting)
    #data = port_object.read(5)
    #print(data)
    port_object.write(pyvesc.encode_request(GetValues))
    #print(port_object.in_waiting)
                # Check if there is enough data back for a measurement
    if port_object.in_waiting > 78:
        (response, consumed) = pyvesc.decode(78)

        #packets = []
        #now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")
        print("response: ",response)
        print("consumed: ", consumed)
        """for sensor, value in response.__dict__.items():
            data = {}
            data['measurement'] = sensor
            data['tags'] = {}
            data['tags']['source'] = 'vesc'
            data['time'] = now
            data['fields'] = {}
            data['fields']['value'] = value
            packets.append(data)"""
            #print(data)

      
#port_object.flush()
#VESCMessage = pyvesc.GetVaĺues()
#packet = pyvesc.decode(VESCMessage)
#print(pa)

this is the result:

data;  2681
response:  None
consumed:  0
data;  2620
response:  None
consumed:  18
data;  2559
response:  None
consumed:  36
data;  2498
response:  None
consumed:  40
data;  2437
response:  None
consumed:  47
data;  2376
response:  None
consumed:  23

Does anyone know what is the problem here, why it gets none? what could be the best solutions? Would be really great! Thanks in Advance.