MQTT server

Overview

We have decided to use MQTT for Room communication because :

it is a very popular industry standard for IoT
it perfectly supports the needs of the escape room
it is easy to install and configure
it is fast
it is lightweight (important for Arduino boards)
design for telemetry MQTT can send big files as well (fingerprint matrix, images, etc.)

We use MQTT for communications with and between the props, and for plugins.

You must NOT use an MQTT broker located on the Internet, you must use an MQTT broker located in your local network. Otherwise, if your Internet connection is interrupted, communication with your escape room will be completely interrupted.

MQTT is a pub / sub protocol (publish / subscribe) :

Easy MQTT broker setup

Room installation implement mosquitto broker, you have nothing to do.

However when you close Room, communications stop.

Recommended MQTT broker setup

We recommend that you configure a mosquitto broker on a Raspberry (Pi 3B / 3B+ / 4) dedicated to your escape room. You may want to use this Raspberry Pi as the escape room electrical panel prop. So when you close Room, communications between the props are always active.

Take the time to read this document if you are developing props on Arduino or Raspberry:

MQTT known issues

MQTT message size on Arduino
MQTT QoS with Python Paho multi-threading

🡲 Setup mosquitto on Raspberry