A dedicated library for RaioTerm IoT that enables seamless Group Communication (The Matrix).

This library is fully tested and compliant with:

• ESP32 (All variants: S2, S3, C3, WROOM)
• ESP8266 (NodeMCU, D1 Mini)
• Raspberry Pi Pico W & Pico 2 W (using the official Arduino Pico core)

• Broadcast: Send a message to everyone in the group.
• Direct Message: Whisper a message to a specific Device ID.
• Multicast: Send to a specific sub-list of devices.
• Self-Loopback: Receive your own messages for verification.

You must install the PubSubClient library in Arduino IDE before using this.

1. Include the library: #include <RaioGroupMatrix.h>
2. Initialize: RaioGroupMatrix matrix(mqttClient, "YOUR_DEVICE_ID");
3. Setup: matrix.begin("YOUR_GROUP_ID");
4. Connect: Inside your MQTT connect loop, call matrix.join();