---
title: "Modbus Integration"
description: "Connect Modbus RTU (RS-485 bus) and Modbus TCP (IP) devices to TapHome: import a ready-made template or map registers yourself in Hardware settings."
url: "https://taphome.com/en/compatibility/modbus-guide/"
language: en
lastmod: 2026-10-08
generator: hugo
ai:
  topics: ["modbus","modbus-rtu","modbus-tcp","rs485-bus","expose-devices","protocol-integration","register-mapping"]
  questions: ["How do I connect a Modbus device to TapHome?","What is the difference between Modbus RTU and Modbus TCP in TapHome?","Where do I configure Modbus in the TapHome app?","Can I use a ready-made template for my Modbus device?","How do I integrate a Modbus device that has no TapHome template?","Which controller terminals support Modbus RTU?","What do I need to map a custom Modbus device manually?"]
---

# Modbus Integration

## 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.

1. Go to **Settings → Hardware → Add new interface → Modbus RTU / Modbus TCP**
2. Select **Modbus RTU** or **Modbus TCP**
3. Choose a template for your device
4. 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 → Hardware**. 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.

### [Modbus Configuration](https://taphome.com/en/docs/integration/modbus/)

Set up Modbus RTU, ASCII, and TCP interfaces, register mapping, and communication parameters.

### [Modbus RTU Wiring](https://taphome.com/en/docs/wiring/modbus-wiring/)

Wiring examples, RS485 bus topology, addressing, and termination for Modbus RTU devices.

### [TapHome as Modbus Slave](https://taphome.com/en/docs/expose-devices/modbus/)

Make TapHome devices readable by other systems over Modbus RTU, ASCII or TCP.