Struggling with configure.yaml

[el tigro]

Well, the sun shines on a dogs arse some days.

We've only gone and done it, HA dash with relay sw. can controll led from dash. I honestly have sticky stuff running down my leg. You have no idea how happy I am.

For future reference.
I was flicking the power to reset pi in between config changes. My mosquitto was not starting from boot, so nothing to connect to, hence the errors when the code was right.
Also reset your nodes after a change.

This my yaml for the following setup

nodes are arduino nanos with nrf2401+ radio. (mysensors 2.0)

gateway is esp8266 NodeMCU 1.09. Wifi with NRF2401+

Pi 3 hosts Home Assistant and Mosquitto broker. Installed with All in one image.

mysensors:
  gateways:
    - device: mqtt
      persistence_file: '/home/homeassistant/mysensors4.json'
      topic_in_prefix: 'mygateway1-out'
      topic_out_prefix: 'mygateway1-in'
  debug: true
  optimistic: false
  persistence: true
  retain: true
  version: 2.0

mqtt:
  broker: localhost
  port: 1883
  client_id: home-assistant-1
  keepalive: 60

Righty. I'm off to play. Be back very soon when i get stuck.

Cheers for now fella, thank you for all your help.