Retrieve JSON data with special characters

Configuration
1

I’ve got a B-Control energy meter. I want to show the values of it in HA, but I dont know how to parse it. These are some values i get:

Schermafbeelding 2021-08-05 om 08.45.45

The sensor i created (which doesnt work):

- platform: rest
  resource: http://192.168.1.15/mum-webservice/data.php
  value_template: "{{ value_json.1-0:18.0*255 }}"
  method: GET
  name: bcontrol_total
  unit_of_measurement: Wh

How do i acces the right variable?

2

If this is actually the issue, maybe try

{{ value_json['1-0:18.0*255'] }}