How can I consume my custom temperature sensor?

Configuration
1

I have sensor in my network on http://some_ip/temp1
When I get this url, I got this e.g.:
“Temperature: -1.30 °C”

I need to consume it and save data into sensor.

I found I can create new sensor restful RESTful Sensor - Home Assistant
But I need to parse data somehow and I don’t know how.
Can you share with me how ?

2

This should do it with the info you gave

sensor:
  - platform: rest
    name: testtemp
    resource: "http://some_ip/temp1"
    value_template: "{{ value_json.temperature }}"
3

Else you start with just {{ value_json }} and then we need to split out the result