How to send TCP message from HA?

Configuration
1

Hello,

I need help to send TCP message from HA to other PC on a specfic port

for example:

message: “my message”
Destanation IP: 192.168.1.1
Destanation Port: 55025

Thank You

2

I have never used it, but there is a TCP integration in Home Assistant.

3

I need to send the message via automation I don’t think it’s possible to do that with sensor or binary sensor that I can create using the TCP integration.

4

It is not clear how your end point receives the message. Here’s something you could try:

Create a rest command

rest_command:
  send_message:
    url: http://192.168.1.1:55025?message='my message'

Use it in an automation

action:
  - service: rest_command.send_message

Otherwise you will have to use a shell command and figure out how to post your message with curl.

5

Just to be clear, are you asking how to set up a port listener on HA in the same way that you would on a Firewall that forwards all messages received on a certain port to a TCP service on HA?

6

No they are asking how to send from HA to a PC.

7

Sorry, translation mistake.

8

What is the listening service on the PC?

It may be possible to send out a simple asci string to the right port.

9

This is just a guess- remember I’ve never used TCP in Home Assistant, but if you provide a name, you should be able to see the entity name in settings > entities. You can then use this entity name in your script or automation.

I have no way to test TCP, but I just tried it. This is what I put into my sensors.yaml:

#---------- Example TCP entry ----------#
- platform: tcp
  name: my_tcp_test
  host: 192.168.1.57
  port: 55025
  payload: "This is my payload"

And in settings → entities, I find this:
sensor.my_tcp_test

10

I have a PC with TCP Listener, I can send ASCII message from other devices and I want to send TCP messages from HA to this PC, It’s a simple message that I need to send via automations for example if window sensor is open then send TCP Message “Window_Open”

11

I’m not sure how can use it… It’s a sensor how can i use it in action?

12

Looks good idea but I need to Check if I can send an HTTP messages instead TCP.

13

Out of my league. Maybe if you make it a switch template?

14

Not Working with Rest_Command :frowning:

15

Solution:

command_line:
  - switch:
      name: my_switch
      command_on: 'echo  "message_on" | nc 10.10.10.1 55025'
      command_off: 'echo "message_off" | nc 10.10.10.1 55025'
1 Like
16

I’d definitely be interested in trying something similar now that I know that it’s possible. Have you found any documentation or online tutorials that explain this?

17

The command_line stuff is HA. That which actually does the work is the bash shell commands. Lots and lots of bash stuff out there, but here’s one. Echo is just a native bash command. Finally, nc is the netcat command.

18

The trouble is knowing what to look for. I know pretty much nothing about Bash so I don’t even know where to start looking, or what it would be called.

I remember there being an echo command in one of the old DOS based systems though that used to be used to add on screen text to batch file executions.