I’m new to grbl, build a system and set up with a raspberry, arduino, and command it with ugs.
Every thing seema to work well.
Then i decide to get more in depth, and base on the simplestream code, y write the following (also new to python ) and found that grbl is respondion with a double ‘ok’, as can be seen change the readed value to discard a double printin of the same read.
This is normal ?, in ugs there is only one ‘ok’ respose or there is i’m doing wrong,
I understand the strean by counting method philosophy, and suppose that for that working as you recieve the ‘ok’ for each command you can update your ques, but i belive there be only one respose per command. I’ right?

this is thw code

!/usr/bin/env python

import serial
import time

def OpenSerial():
s = serial.Serial(‘COM4’,115200,timeout=0.1)
return s

def CloseSerial(s):
s.close()

def ReadLines(s):
time.sleep(0.1)
while s.inWaiting():
grbl_out = s.readline()
print grbl_out.strip()
grbl_out=’-‘
print grbl_out.strip()

Ard=OpenSerial()
Ard.write(“\r\n\r\n”)
time.sleep(2)
ReadLines(Ard)
Ard.flushInput()
while True:
cmd=raw_input(” Enter grbl command.”).upper()
if “END” in cmd:
break
print ‘ Sending: ‘ + cmd
if “^X” in cmd:
cmd=b”\030\r\n”
Ard.write(cmd)
else:
Ard.write(cmd + ‘\r\n’)
ReadLines(Ard)
CloseSerial(Ard)

And this is the result
##

Grbl 0.9j [‘$’ for help]

[‘$H’|’$X’ to unlock]

Enter grbl command.$x
Sending: $X

[Caution: Unlocked]

ok

ok

Enter grbl command.?
Sending: ?

ok

ok

Enter grbl command.g0x100
Sending: G0X100

ok

ok

Enter grbl command.g0y100
Sending: G0Y100

ok

ok

Enter grbl command.?
Sending: ?

ok

ok

Enter grbl command.end