Hi everyone, I’m currently diving into integrating MQTT into my home automation setup and I’m running into a bit of a snag. I’ve followed several tutorials, including ones from DIY Projects, DIY IoT, and Adafruit, but I’m still stuck at the very beginning—getting my Wemos D1 mini Lites to publish sensor data to the Mosquitto broker. My goal is pretty straightforward: have these devices send their DHT22 measurements to the broker and display them on my Home Assistant dashboard. Let me walk through what I’ve done so far and where I’m hitting a wall.First, I installed Home Assistant Supervised and added the Mosquitto broker addon. I configured it with a username and password, disabled anonymous access, and set up SSL with the provided certificates. In my configuration.yaml, I added the MQTT settings pointing to the Mosquitto broker. Everything seems to start up without issues, and the logs show that the broker is running and accepting connections.I tested the setup using the MQTT CLI tool. I subscribed to the topic ‘home/whz/temp’ and then published a message to the same topic. The Mosquitto logs showed that the connection was successful, and the message was sent. However, when I tried to listen for the message in another terminal window, nothing showed up. The same issue persists when using MQTT-Explorer or the Home Assistant interface. Even after a system reboot, the problem remains.I’m a bit puzzled because the CLI commands seem to work, but the messages aren’t being received where they should be. I’m wondering if there’s a configuration detail I’m missing, perhaps in the access control list or the MQTT settings within Home Assistant. I’ve checked the logs extensively, but everything looks fine. The connections are being established, and the messages are being sent, but they aren’t showing up on the receiving end.Has anyone encountered a similar issue? I’m considering whether there’s a firewall or network configuration blocking certain ports, but both the broker and Home Assistant are running on the same local network. Any insights or suggestions would be greatly appreciated! I’m really looking forward to getting this working so I can start expanding my sensor network.