How to switch tasmota light bulb with HTTP

Setup, Configuration and Use Beginners
6

Thanks a lot for the hints! Based on your hints, I was able to configure the light bulb as follows:

UID: http:url:86e189c392
label: Lampe .30
thingTypeUID: http:url
configuration:
  authMode: BASIC
  ignoreSSLErrors: false
  baseURL: http://192.168.178.30/
  delay: 0
  stateMethod: GET
  refresh: 2
  commandMethod: GET
  timeout: 3000
  bufferSize: 2048
location: Wohnzimmer
channels:
  - id: OnOffSwitch30
    channelTypeUID: http:switch
    label: OnOffSwitch30
    description: null
    configuration:
      onValue: ON
      stateExtension: cm?cmnd=Power
      offValue: OFF
      commandExtension: cm?cmnd=Power %2$s
      stateTransformation: JSONPATH:$.POWER

With this configuration, I can successfully toggle my light bulb from the items page.