Hubs, sensors and automation platforms such as Home Assistant and Node-RED already speak MQTT. A managed broker gives you remote access without opening ports at home.
No card required
You build the automations, ConnectMQ moves the data. Hubs and sensors publish once; Home Assistant, Node-RED flows, your phone dashboard and notifications each subscribe to what they need — at home or from anywhere.
home/living-room/thermostat/state
home/living-room/thermostat/set
home/garage/door/state (retained)A broker on a box at home needs port forwarding or a VPN before you can reach it from outside, and it is one more thing to patch and back up. With ConnectMQ, every device and app connects out to the broker over TLS, wherever it is.
One of the most common smart-home MQTT setups: a sensor and a smart plug in a cabin that only has a 4G router, Home Assistant at home, and ConnectMQ in the middle. Neither place opens a port — both connect out to the broker over TLS.
02:10 ESP32 sensor in the cabin
Publishes the room temperature every 5 minutes, over the cabin’s 4G router and TLS.
cabin/living/temperature → 3.802:10 Home Assistant at home
Subscribed through ConnectMQ. The automation “cabin below 5 °C” fires and switches the heater plug.
cmnd/cabin-heater/POWER → ON02:10 Tasmota smart plug in the cabin
Turns the heater on and reports its new state, which Home Assistant shows straight away.
stat/cabin-heater/POWER → ON02:11 Your phone
Home Assistant sends a notification: “Cabin at 3.8 °C — heater switched on.” At 8 °C it switches the plug off again.
If the cabin’s 4G drops, ConnectMQ publishes the plug’s Last Will tele/cabin-heater/LWT → Offline and Home Assistant marks it unavailable — so a silent cabin is never mistaken for a warm one.
Machines, PLC gateways, OEE and quality data
Vehicle tracking, telematics and cold chain
Meters, EV chargers, solar and batteries
Smart devices you ship to your own customers
Robot fleets talking to fleet managers and AI pipelines
Power, cooling and rack environment
Streetlights, parking, air and waste sensors
Soil probes, weather stations and irrigation
From first ESP32 to classroom labs
Start on the Free plan with no card, then move to Basic: up to 100 concurrent connections — plenty for a hub, Home Assistant, Node-RED and your phones. No port forwarding, and you can cancel anytime.
