Home Assistant MQTT Voice Integration

I need to setup a VPS ready and Home Assistant. My next step is to add a rock-solid MQTT layer so I can trigger relay modules through voice commands issued from Amazon Alexa, Google Assistant, and Apple Siri. The relays must respond to simple ON/OFF requests and support dimming where hardware allows.

Here’s what I need you to handle:

• Recommend and install a production-grade MQTT broker on the VPS, configure secure remote access (SSL/TLS and user auth) and verify message flow with Home Assistant.
• Create the necessary automations/intents inside Home Assistant so each of the three assistants recognises the devices and exposes the ON/OFF plus dimming capabilities.
• Supply clean, well-commented Arduino (ESP32) code that subscribes to the chosen topics and drives the relay boards accordingly. I should be able to flash the sketch, power up the module, and watch the relays respond instantly.
• Run live tests with at least one virtual and one physical device to confirm that commands from every assistant reliably operate the switches and dimmers.
• Provide concise documentation: broker install steps, topic structure, example Home Assistant YAML, and a short troubleshooting checklist.

Acceptance is tied to a demo session where I issue voice commands from Alexa, Google, and Siri and observe the relays toggle and dim in real time on both the dashboard and the physical board.

You will not be provided server VPS credentials and you need to work online via anydesk ir similar software only.