Essaie ça :
sensor:
# Klereo Get jwt token (50mn)
- platform: rest
name: KlereoToken
scan_interval: 3000
resource: https://connect.klereo.fr/php/GetJWT.php
method: POST
headers:
Content-Type: "application/x-www-form-urlencoded; charset=UTF-8"
payload: "login=Fmau&password=b&version=391-H&app=Api"
value_template: "{{ value_json.token }}"