Help with sending a text to my TTS Tablet

Hello everyone! I am new to HA and am currently leaving Fibaro which is stuck in the stone age with its outdated software.
A small problem has now arisen that I was wondering if you could help me with…

I have long used a TTS solution where I send my text to a Tablet with the following HTTP command:
http://192.168.1.17:8080/tts=This is my TTS message&vol=10”

In configuration.yaml I have entered the following code:

----------------------------------------
rest_command:
  tts_request:
    url: "http://192.168.1.17:8080/tts="
----------------------------------------

And in automation.yaml I have the following code:

`----------------------------------------
- id: '1645281816449'
  alias: My_TTS
  description: Send a text string to my TTS tablet.
  trigger:
  - platform: time
    at: '12:00'
  condition: []
  action:
  - service: rest_command.tts_request
    data: {}
  mode: single
-----------------------------------------`

I notice that my tablet reacts (plays a sound) when the automation is triggered.
But how do I attach a text so that it can be read?

I’ve searched the forums and I’ve tried lots of code examples, but I’m not succeeding.
Probably it is very simple, so if someone can show me how to do it I would be very happy.

I think you will need something like this

rest_command:
  tts_request:
    url: 'http://192.168.1.17:8080/tts={{ message }}&vol=10'

Then you will be able to pass in the message

----------------------------------------
- id: '1645281816449'
  alias: My_TTS
  description: Send a text string to my TTS tablet.
  trigger:
  - platform: time
    at: '12:00'
  condition: []
  action:
  - service: rest_command.tts_request
    data:
      message:  'This my message'
  mode: single
-----------------------------------------

Andy, You are a shining star in my sky!
Thank you! You have saved my day!
//RH