Mosquitto Broker

[peno64]

At https://dawidchyrzynski.github.io/arduino-home-assistant/documents/getting-started/prerequisites.html it is described that the MQTT protocol is needed and that the recommended setup method is to use the Mosquitto Broker addon (note that that page also has a typo because it says brokker instead of broker).

Unfortunately addons are not always available in home assistant. Home Assistant Operating System or Home Assistant Supervised is needed to be able to install an addon. Since alot of people install Home Assistant Core and especially if it is installed under docker because then Core is the only option, addons are not available so it is then impossible to install the addon.

Fortunately there are other options to install Mosquitto.
It's all described very well at this link: https://hometechhacker.com/mqtt-home-assistant-using-docker-eclipse-mosquitto/
And I can confirm it works perfect when it is done this way.

It would be great if the prerequisite also mentioned this.