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How do I get medium-sized datasets into hass?

I am using REST from external sources, but as I don’t have a webserver I need some other way to get a few thousand numbers into hass.
I’ve spent two days fiddling with MQTT now, only to realize, that packages apparently are limited to 256 bytes:


My configuration.yaml:

  - platform: mqtt
    name: "Prognoser"
    state_topic: "homeassistant/prognoser"
    unit_of_measurement: ""
    value_template : "{{ value_json }}"

Without the last line I can get data into hass, with the last line, it drops the messages - and I’ll probably still have the 256 bytes limitation.

seems to be an option, but is there anything better?

Attributes don’t have the size restriction


I’ve tried to add attributes to my communication, and it worked - after having found out that strings were a no-no

Case closed