What is Modbus?
Modbus is a widely-used industrial communication protocol for connecting devices like electric meters, inverters, heat pumps or air recovery units. TapHome supports two variants:
- Modbus RTU — wired connection via RS485 bus (BUS 1, BUS 2 or BUS 3 terminals on the controller)
- Modbus TCP — connection via ethernet or WiFi using the device’s IP address
Using Ready-Made Templates
The fastest way to connect a Modbus device is to use a pre-configured template from the compatibility list. Templates define all necessary registers, data types and device mappings — no manual register mapping needed.
- Go to Settings → Expose Devices → Modbus
- Select Modbus RTU or Modbus TCP
- Choose a template for your device
- Enter the connection details (bus terminal or IP address) and confirm
Browse the available Modbus templates below.
Custom Modbus Integration
If your device is not in the template list, you can configure it manually through Settings → Expose Devices. Define the Modbus interface, set communication parameters (baud rate, parity for RTU; TCP port for TCP), and map individual device registers.
You will need the device’s Modbus register map — usually available in the manufacturer’s documentation.