Universal Modbus for Home Assistant (Marketplace integration)

On Home Assistant 2026.10 or older? Open it in HACS

Installs: 52 sharing analytics
GitHub stars: 10
Connection: Works locally
Upkeep: Updated in the last 6 months
Version: v1.3.2, October 24, 2026
Category: Hubs and protocols, Building automation
Kind: Marketplace integration
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: universal_modbus
Source: github.com/Idelmaeaen/HA-Universal-Modbus
Issues: Report an issue

Shows in Vulpo Quick Toggle card, Button card, Select card, Chart card, Apple Watch, Control Center.

Download Vulpo

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

Screenshots From the README of Idelmaeaen/HA-Universal-Modbus.

About

Universal Modbus is a custom integration that connects Home Assistant to Modbus TCP devices over the local network. Connections and entities are configured in the Home Assistant UI, with no YAML needed. It reads coils, discrete inputs, holding registers and input registers, and writes coils and holding registers. Values become sensors, binary sensors, switches, buttons, numbers and selects, with scaling, offsets, byte order, word order and optional read and write formulas. A sidebar editor manages several hubs, lets entities be added, edited or duplicated, and shows connection status, response time and communication errors. Hub configurations can be exported and imported, and the export leaves out the IP address.

Automatic summary of the README and code of Idelmaeaen/HA-Universal-Modbus. Something wrong, or are you the maintainer and want your own text here? Get in touch

Shows in Vulpo

Quick Toggle card, Button card, Select card, Chart card, Apple Watch, Control Center.

Download Vulpo

Installs over time

Oct 21Nov 9

#1,518 of 1,551 Marketplace integrations. Installs sharing analytics.

Supports

Works locallyTalks to your devices on your own network. No vendor cloud in between.
From the MarketplaceInstalled through the Marketplace, formerly HACS.
Actively maintainedIts author released or pushed a change in the last six months.

Provides

Switches
Sensors

Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

Add Modbus TCP device

Device name
Host
Port
Unit ID
Scan interval
Timeout

After setup

Profile name
Manufacturer
Model
Description
Hub byte order
Hub word order
Name
Entity type
Register area
Data type
Register count
Scale
Offset
Advanced calculation
Read formula
Write formula
Unit
Icon
Displayed decimal places
Device class
State class
Name
Entity type
Register area
Data type
Register count
Scale
Offset
Advanced calculation
Read formula
Write formula
Unit
Icon
Displayed decimal places
Device class
State class
Entity
Name
Entity type
Register area
Data type
Register count
Scale
Offset
Advanced calculation
Read formula
Write formula
Unit
Icon
Displayed decimal places
Device class
State class
Name
Entity type
Register area
Data type
Register count
Scale
Offset
Advanced calculation
Read formula
Write formula
Unit
Icon
Displayed decimal places
Device class
State class
Entity
Confirm deletion

Texts from the code of Idelmaeaen/HA-Universal-Modbus.

Entities

SensorsResponse time, Communication errors, Last successful update

From the README

Universal Modbus is a custom Home Assistant integration for Modbus TCP devices. Connections and entities are configured through the Home Assistant UI; no YAML configuration is required.
Universal Modbus is developed and maintained by Edelmann Electronics.
Create and manage multiple Modbus TCP hubs in the sidebar
Read coils, discrete inputs, holding registers, and input registers
Write coils and holding registers
Create sensor, binary_sensor, switch, button, number, and select entities, including pulsed ToggleSwitch entities
Decode bool, int16, uint16, int32, uint32, int64, uint64, and float32 values
Configure scaling, offsets, byte order, and word order
Use safe per-entity read and write formulas for advanced calculations
Use a separate feedback register for writable entities
Display and control entity values directly in the sidebar
Import and export a complete hub
English and German UI translations