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

ESPHome
1

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.

2

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

3

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.

4

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

5

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: |
    -----BEGIN CERTIFICATE-----
    MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
    TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
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    emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=
    -----END CERTIFICATE-----
2 Likes
7

This worked for me to connecting to HiveMQ! I was tryin for days.
May I ask where did you get the cert from?

8

Step 3 in the video on this site: How to Use HiveMQ Cloud MQTT Broker with Home Assistant

9

Any pointers here?

[11:14:17][I][mqtt:250]: Connecting to MQTT...
[11:14:17][D][esp-idf:000]: I (33318) mqtt_client: Client asked to disconnect
[11:14:32][D][esp-idf:000][mqtt_task]: E (48253) esp-tls-mbedtls: mbedtls_ssl_setup returned -0x7F00
[11:14:32][D][esp-idf:000][mqtt_task]: E (48256) esp-tls: create_ssl_handle failed
[11:14:32][D][esp-idf:000][mqtt_task]: E (48258) esp-tls: Failed to open new connection
[11:14:32][D][esp-idf:000][mqtt_task]: E (48260) transport_base: Failed to open a new connection
[11:14:32][D][esp-idf:000][mqtt_task]: E (48269) mqtt_client: Error transport connect
[11:14:32][E][mqtt.idf:162]: MQTT_EVENT_ERROR
[11:14:32][E][mqtt.idf:164]: Last error code reported from esp-tls: 0x8017
[11:14:32][E][mqtt.idf:165]: Last tls stack error number: 0x7f00
[11:14:32][E][mqtt.idf:166]: Last captured errno : 0 (Success)
[11:14:33][W][mqtt:340]: MQTT Disconnected: TCP disconnected.
[11:14:33][I][mqtt:250]: Connecting to MQTT...
[11:14:33][D][esp-idf:000]: I (48610) mqtt_client: Client asked to disconnect

I’ve tried it both with skip_cert_cn_check: true and false. Same errors.

esp32:
  board: wemos_d1_mini32
  framework:
    type: esp-idf

mqtt:
  broker: xxxxxxxxxxxxx.s1.eu.hivemq.cloud
  reboot_timeout: 0s
  port: 8883
  skip_cert_cn_check: true
  username: xx
  password: xx
  certificate_authority: |
    -----BEGIN CERTIFICATE-----
    MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
    TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
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    -----END CERTIFICATE-----

MQTT Explorer connects just fine from my network so I know credentials word.

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EDIT: solved. This is an OUT OF MEMORY problem. Im using an ili9341 display on a D1 mini WROOM board and my ESPHome code is over 2000 lines long. Commenting out the display section and everything works fine. Recommendation is to use an ESP32 S3 with more PS RAM.

I hope this helps someone else battling this problem!