touchCNC/grbl_gcode_send.py

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2023-12-03 21:04:30 +01:00
import serial
import time
# Define the serial port and baud rate for communication
ser = serial.Serial('/dev/ttyUSB0', 115200, timeout=1)
# Function to send G-code commands
def send_gcode(ser, command):
# Split the command into chunks of 120 characters or less
chunks = [command[i:i + 120] for i in range(0, len(command), 120)]
for chunk in chunks:
ser.write((chunk + '\n').encode())
response = ser.readline().decode().strip()
if response != 'ok':
# Handle errors or unexpected responses here
print(f"GRBL response: {response}")
# Function to wait until the buffer is empty
def wait_for_buffer_empty():
while True:
status = send_gcode('?')
if status.startswith('<Idle'):
break
time.sleep(0.1)
if __name__ == "__main__":
# Your G-code commands
gcode_commands = [
'G21', # Set units to millimeters
'G90', # Set to absolute positioning
'G1 X10 Y10 F100', # Move to X10 Y10 at a feed rate of 100 mm/min
'G1 X20 Y20 F100',
]
try:
# Initialize communication
#ser.open()
ser.flushInput()
ser.flushOutput()
# Send G-code commands
for command in gcode_commands:
send_gcode(command)
# Wait for the buffer to empty
wait_for_buffer_empty()
except Exception as e:
print(f"An error occurred: {str(e)}")
finally:
ser.close()