Connecting ESPHome Sensor to hivemq broker throws MQTT Disconnected: TCP disconnected

Im trying to connect to a hivemq Broker but get an error while doing so.
Error is:
[13:59:44][I][mqtt:176]: Connecting to MQTT…
[13:59:44][W][mqtt:264]: MQTT Disconnected: TCP disconnected.

Config is:

mqtt:
  broker: xxxxxxxxxxxxxxxxxxxxxxxxxxxx.s1.eu.hivemq.cloud
  port: 8883
  username: <myMqttUser>
  password: <myPassword>

The hivemq Broker works, i tested it with mosquitto CLI already.

Mqtt usually operates on port 1883. I think 8883 is for ssl.

Yes I have done some research. As it turns out, hivemq only supports secure connections. That means with an esp8266 board, which I am using, I cannot connect to that broker. Sadly.

Were you able to connect in eshome to esp8266 or esp32 with hivmq?

In my case following config works:

esp32:
  board: esp32dev
  framework:
    type: esp-idf

#....


mqtt:
  broker: xxx.s2.eu.hivemq.cloud
  port: 8883
  username: xxx
  password: xxx
  certificate_authority: |
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    -----END CERTIFICATE-----
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