# Sending sensor data to Logix from pycomm3 **URL:** \ **Category:** General Discussion\ **Created:** [October 13, 2025, 8:00pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409 "2025-10-13T20:00:17Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:00pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/1 "2025-10-13T20:00:17Z")
Newbie (sorry) iv got sensor data ( a number string) once every second i want to be able to send it to the Logix system (Allen Bradley), this is new to me. is pycomm3 the best way, or should i be looking to do it another way. Thanks in advance, Jeff ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 13, 2025, 8:01pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/2 "2025-10-13T20:01:15Z")
Ignition has drivers for Logix PLCs. Is this question purposely in General Discussion because it's not Ignition related? ---
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [October 13, 2025, 8:04pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/3 "2025-10-13T20:04:42Z")
Tip: punctuate and capitalise your posts properly for readability - especially for non-English speakers / translator software - and to maintain some credibility. Otherwise, welcome to the forum. ---
**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\ **Post date:** [October 13, 2025, 8:09pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/4 "2025-10-13T20:09:35Z")
> [@jeffclark.mobile](#): > > the best way Depends on your context, is this a critical industrial process or a home DIY project you're enjoying the build process on? ---
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:44pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/5 "2025-10-13T20:44:47Z")
it is not ignition related, its a linux device reading data from a sensor, i want to send it to Logix, from there they can process the new readings ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 13, 2025, 8:45pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/6 "2025-10-13T20:45:44Z")
Sure, use pycomm3 🤷 Is there a different programming language you're more comfortable with than Python? ---
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:47pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/7 "2025-10-13T20:47:02Z")
its industrial, the critical part will be done in Logix, I just to get the data to Logix Looking for options. thanks ---
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:50pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/8 "2025-10-13T20:50:02Z")
no, in fact im still very new with python as well, however some of my scripts have proved useful for us, when it comes to interacting with different hardware Glad to hear pycomm3 will work, do you know of similar code that i could compare ? ---
**Author:** ![David\_Stone](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/david_stone/32/79749_2.png) [@David\_Stone](https://forum.inductiveautomation.com/u/David_Stone)\ **Post date:** [October 13, 2025, 8:50pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/9 "2025-10-13T20:50:39Z")
I would use the OPCUA interface in Linx Gateway on a computer and use a python OPCUA client to interact with it. That way its a manufacturer supported communication method, and the python part is in the IT level. The last thing you want is to adversely affect the comms on the PLC with a badly implemented python library that you don't control. ---
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:53pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/10 "2025-10-13T20:53:12Z")
Thanks for the input, ill check it out ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 13, 2025, 8:55pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/11 "2025-10-13T20:55:15Z")
A few seconds with an LLM gave me this: ```python #!/usr/bin/env python3 # /// script # dependencies = [ # "pycomm3>=1.2.14", # ] # requires-python = ">=3.11" # /// """ PLC Data Writer - Reads sensor data from a file and writes to a Logix PLC tag Usage: uv run plc_data_writer.py python3 plc_data_writer.py """ import argparse import time import sys from pathlib import Path from pycomm3 import LogixDriver def read_sensor_data(file_path): """ Read sensor data from the specified file. Returns the data as a string, stripped of whitespace. """ try: with open(file_path, 'r') as f: data = f.read().strip() return data except FileNotFoundError: print(f"Error: File '{file_path}' not found.") return None except Exception as e: print(f"Error reading file: {e}") return None def write_to_plc(plc, tag_name, value): """ Write a value to the specified PLC tag. Returns True if successful, False otherwise. """ try: # Try to convert to numeric if possible try: # Try integer first numeric_value = int(value) except ValueError: try: # Try float numeric_value = float(value) except ValueError: # Keep as string if not numeric numeric_value = value result = plc.write(tag_name, numeric_value) if result: print(f"Successfully wrote '{numeric_value}' to tag '{tag_name}'") return True else: print(f"Failed to write to tag '{tag_name}'") return False except Exception as e: print(f"Error writing to PLC: {e}") return False def main(): parser = argparse.ArgumentParser( description='Read sensor data from a file and write to a Logix PLC tag every second.' ) parser.add_argument('file_path', help='Path to the file containing sensor data') parser.add_argument('tag_name', help='Name of the PLC tag to write to') parser.add_argument('plc_ip', help='IP address of the Logix PLC') parser.add_argument('--slot', type=int, default=0, help='PLC slot number (default: 0)') args = parser.parse_args() # Verify file exists if not Path(args.file_path).exists(): print(f"Error: File '{args.file_path}' does not exist.") sys.exit(1) # Connect to PLC print(f"Connecting to PLC at {args.plc_ip}...") try: with LogixDriver(args.plc_ip, slot=args.slot) as plc: if not plc.connected: print("Failed to connect to PLC.") sys.exit(1) print(f"Connected to PLC: {plc.info}") print(f"Reading from file: {args.file_path}") print(f"Writing to tag: {args.tag_name}") print("Press Ctrl+C to stop...\n") # Main loop - read and write every second while True: # Read sensor data from file sensor_data = read_sensor_data(args.file_path) if sensor_data is not None: # Write to PLC tag write_to_plc(plc, args.tag_name, sensor_data) # Wait 1 second before next iteration time.sleep(1) except KeyboardInterrupt: print("\n\nStopping program...") sys.exit(0) except Exception as e: print(f"Error: {e}") sys.exit(1) if __name__ == " __main__": main() ``` caveat emptor. ---
**Author:** ![jeffclark.mobile](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jeffclark.mobile](https://forum.inductiveautomation.com/u/jeffclark.mobile)\ **Post date:** [October 13, 2025, 8:58pm UTC](https://forum.inductiveautomation.com/t/sending-sensor-data-to-logix-from-pycomm3/111409/12 "2025-10-13T20:58:55Z")
LOL, looks like i need to invest time into a LLM thanks for the quick responses appreciate it. 🙂