mqtt-broker

I spent hours to to setup the TSL connection for my mosquitto broker in my raspberry. Now I can publish and subscribe topics in a client (on raspberry) using client certificate, client private key and ca certificate. It works correctly.

Now I want to create the client in the ESP32 (IDF platform). I started from the example called ssl_mutual_auth. Unfortunatly in the example is used the client certificate, client private key and a server certificate not the ca certificate. So.. I'm confused and I don't know how to manage the ca.crt file in esp32 client (or Mosquitto client). Do I need to change my certificates or my mosquittos configuration? I used this guide to configure my mosquitto broker : https://medium.com/himinds/mqtt-broker-with-secure-tls-communication-on-ubuntu-18-04-lts-and-an-esp32-mqtt-client-5c25fd7afe67

Here the Mosquitto.conf details where I set the path of certificates:

Let's say I want to run a container from an image from docker hub, let's say mosquitto I'd execute docker run -it -p 1883:1883 -p 9001:9001 eclipse-mosquitto.

I tried to pull the image from gcr.io (deployment.yaml) like done here:

I have an MQTT (EMQX) server running on an ip and a port. And I communicate directly between my service and that port using the nodejs MQTT library.

I want to use a reverse proxy (nginx) to be able to use a DNS in order to prune the communication.

At this moment my nginx is configured like this:

Description: Unable to bind a new PVC to an existing PV that already contains data from previous run (and was dynamically created using gluster storage class).

• Installed a helm release which created PVC and dynamically generated PV from GlusterStorage class.
• However due to some reason, we need to bring down the release (helm del) and re-install it (helm install). However, want to use the existing PV instead of creating a new one.

I tried a few things: - Following the instruction here: https://github.com/kubernetes/kubernetes/issues/48609. However, that did not work for GlusterFS storage solution since after I tried the needed steps, it complained:

In the documentation AWS Service Limits the payload size limit is not clear for the IoT-Core service. Since we can bridge local mosquitto to AWS IoT, I suppose that this last one should accept the max size of payload from mosquitto witch is 256Mb. So what is the max size (in terms of payload) that I can send to a broker in AWS-IotCore?

The reason for that question is that I dont want to create to many documents in my mongoDb. For that I am going to send hourly data and the document or the message payload will be much higher than sends for seconds.

How I can use callback function from QThread?

Callback function on_message does not print any data. In run() I connect to mqtt-broker and subscribe on topic. on_message must work when I get new message.

Example simple QT app. Change value event connected with simple QLCD. Subscription topic took from dashboard

Establishing a connection to an MQTT 3.1.1 endpoint following the description here and the Operating Devops Commands end up in an invalid json 400 response. Even the example MQTT-Bidirectional gets refused with a 400. So this is why i am posting this question here to get hints what i am currently doing wrong and what i can do to get it right to help others running in the same issue. Here is my curl request:

I need to send some data from django wed server to board (esp8266), using MQTT protocol. I have problems with finding information about how to connect django and mqtt-broker. How can I implement this?

Some MQTT-brokers accept auth-tokens as username (e.g. mqtt.flespi.io). In man mosquitto_pub I found that clients support configuration files:

FILES

$XDG_CONFIG_HOME/mosquitto_sub, $HOME/.config/mosquitto_pub Configuration file for default options.

But there are no clarification about file format. I tried this: