Top 3 Free MQTT Servers for Testing ESP32 and IoT Projects
In this video, I show three free, fully functional MQTT servers that can be used for debugging and testing ESP32 and IoT projects without installation or complex setup.
If you, like me, have wasted time wondering:
Where can I get an MQTT server?
Do I need a login and password?
Which broker is suitable for short tests?
How can I quickly test an ESP32 sketch?
—this video will save you hours.
🔹 We'll test the following one by one:
test.mosquitto.org — a public broker with different ports, encryption, and certificates
mqtt.pro — a convenient demo sandbox with a login and password
HiveMQ (mqtt-dashboard.com) — a fast test server without authorization
🔹 In the video, you'll see:
a real ESP32 connection to MQTT
sending and receiving messages
working through MQTT Explorer
the pros and cons of each broker
my personal conclusion — which server is best for which tasks
📌 All servers use the same ESP32 test sketch, where the controller:
connects to Wi-Fi
connects to the MQTT broker
publishes messages every 5 seconds
receives messages and displays them in the Serial Monitor
🛠 Need a turnkey MQTT or IoT project?
My main work is the design and development of electronic devices and printed circuit boards based on:
ESP32 / Arduino
GSM / LTE / Wi-Fi
weight, temperature, humidity, pressure, etc. sensors
cloud services and MQTT
I help transform ideas into working prototypes and commercial devices – from the schematic and firmware to the finished board.
👉 Portfolio and Services:
🔗 https://geekmatic.in.ua/elektronschik/
To get started, simply describe the problem in your own words – we'll figure it out and find the optimal solution.
👍 If you found the video helpful, please like and subscribe.
💬 Tell us in the comments which MQTT server you use and for what tasks.
🔔 Future videos will feature even more hands-on experience with ESP32, MQTT, and IoT.
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Our website: https://geekmatic.in.ua
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