OMG 1.4 , start from new, can receive but not send any command

Hello together
i installed my MQTT Integration from new and have made the System to run now.

the OMG on Heltec Setup could not detect my switch remote as it has a strange protocoll
i sent the command via Remote and added these Lines with …/commands/MQTTtoRTL_433/… to the configuration.yaml

it results in i cannot send any command with the Heltec OMG.

mqtt:
  switch:
    - unique_id: SwitchB
      name: "SwitchB"
      state_topic: homeassistant/OpenMQTTGateway_heltec_rtl_433_ESP/RTL_433toMQTT/Smoke-GS558/21572
      command_topic: homeassistant/OpenMQTTGateway_heltec_rtl_433_ESP/commands/MQTTtoRTL_433/Smoke-GS558/21572
      #value_template: "{{ value_json.value }}"
      payload_on: '{"model": "Smoke-GS558","id": 21572,"unit": 0,"learn": 0,"code": "8a8880","protocol": "Wireless Smoke and Heat Detector GS 558","rssi": -62,"duration": 308996}'
      payload_off: '{"model": "Smoke-GS558","id": 21572,"unit": 0,"learn": 0,"code": "2a8880","protocol": "Wireless Smoke and Heat Detector GS 558","rssi": -62,"duration": 308996}'

Can anyone Tell me the correct Line or the Mistake i did here?
The HA Autodiscovery only detects the RSSI, but not that its a Switch Remote
Also in the newest HA Version the beginning of the yaml File is different than in the OMG Documentation

mqtt:
  switch:

Hello,

Unfortunately, sending is not supported with RTL_433.
And I have not tested it yet with the SX127X based boards. Give us sometimes on this