For professional HVAC applications, RS485 Modbus is one of the most commonly used communication methods.
Many HVAC devices support Modbus communication, including:
Connection example:
ESP32 Smart Control Panel
↓ RS485 Modbus
HVAC Controller
The ESP32 panel can control:
Advantages:
✅ Reliable wired communication
✅ Long-distance transmission
✅ Suitable for hotels and commercial buildings
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