Configuration yaml file for mqtt keeps complaining with errors

Configuration Frontend
1

Hello all.
I am trying to run Home Assistant Core with a configuration yaml file. When I have the following in yaml:

sensor:
  - platform: mqtt
    name: "Temperature Sensor"
    state_topic: "application/c503b6e1-3af6-417f-9628-a58843e7f06d/device/2cf7f120502071a4/event/up"
    value_temmplate: "{{ value_json.time }}"
    unique_id: "testB_sensor"

HA responds with (this is seen under Settings at top, Notifications shows the number 2 but nothing exists under that tab) see second post.

When I remove the line platform: mqtt

sensor:
#  - platform: mqtt
  name: "Temperature Sensor"
  state_topic: "application/c503b6e1-3af6-417f-9628-a58843e7f06d/device/2cf7f120502071a4/event/up"
  value_temmplate: "{{ value_json.time }}"
  unique_id: "testB_sensor"

then HA under notifications gives me the following error (this is seen when clicking on Notifications and Show logs) see attachment

image
image766×101 19 KB

My apologies for two posts but HA Forum won’t let newbies add more than 1 image. I am using 2 spaces per required by yaml as can be seen in png. In both instances I go to Developers tools and click Restart and Restart Home Assistant. HA is running from a docker container.

Can someone please give me some advice on what to try?

Thank you

2

Follow up image due to HA Forum not allowing two images on one post.

image
image751×492 94.5 KB

3

Simply follow the format as described in the documentation (as advised in the error). There’s an example on top of the page how to do it: