Text Display on an LED Matrix

Smart LED matrix display system via an IoT platform

IoT solution for sending messages remotely from a connected platform and displaying them in real time on an LED matrix using an ESP32 board and the MQTT protocol.

‎Detailed description

With the evolution of the Internet of Things (IoT), it has become possible to communicate instantly with connected devices in order to display or transmit information in real time.

Conventional display boards often require manual intervention to change messages. This method is impractical when information must be updated remotely or frequently.

The project consists of developing a smart display system based on an ESP32 board connected to the Internet. Messages are sent from an IoT platform via the MQTT protocol and then automatically received by the ESP32, which displays them on a MAX7219 LED matrix.

‎General operation:

The user enters a message on the IoT platform. The platform publishes this message via MQTT. The ESP32, connected to the Wi-Fi network, receives the message. The text is immediately displayed on the LED matrix as scrolling text.

Main features:

Real-time text display. Wireless communication via Wi-Fi. Message reception through the MQTT protocol. Remote information updates. Dynamic display on an LED matrix.

‎Technologies used:

- ESP32

- MQTT

- MAX7219 LED matrix

- Wi-Fi

- Arduino IDE

- IoT platform

‎Applications:

· Welcome messages

· Announcement display

· Notifications and alerts

· Smart signage

· Information display in schools, companies, laboratories and public spaces