# Ranaliz iOT Tester: Modbus, IEC-104, MQTT, and Zigbee in One App

> Test Modbus, IEC 60870-5-104, MQTT, and Zigbee in one desktop app with Ranaliz iOT Tester. Completely free for macOS and Windows.

Kaynak: https://ranaliz.com/en/blog/ranaliz-iot-tester · Yazar: Ahmet Korkmaz · Güncelleme: 2026-09-12


Field and lab teams often juggle multiple protocol tools: one app for Modbus, another for IEC-104, and separate setups for MQTT or Zigbee. That split workflow costs time and adds install overhead.

**Ranaliz iOT Tester** brings these four protocols into **one desktop application** — and it is **completely free**.

## What does it offer?

Ranaliz iOT Tester supports testing for:

- **Modbus**
- **IEC 60870-5-104**
- **MQTT**
- **Zigbee**

The goal is to run connection and protocol tests from a single app instead of fragmented tools.

## Who is it for?

- Field engineers
- System integrators
- Technical teams that need to verify protocol connectivity

## Platforms

The app is available for **macOS** and **Windows** (Windows 10+).

## Is it paid?

No. Ranaliz iOT Tester is **completely free**. There is no license fee.

## How is it different from the energy monitoring platform?

| | iOT Tester | Energy Monitoring Platform |
|---|---|---|
| Type | Desktop protocol test app | Web-based monitoring and operations SaaS |
| Focus | Modbus / IEC-104 / MQTT / Zigbee testing | Live KPIs, alarms, tasks, analytics |
| Pricing | Free | Quote-based |

They are different products in the Ranaliz family; one does not replace the other.

## How to download

Download the macOS or Windows installer from the product page:

→ [Ranaliz iOT Tester product page](https://ranaliz.com/en/product/iot-tester)

## Field guides

- [Modbus exception codes 01–0B](https://ranaliz.com/en/blog/modbus-exception-codes)
- [SunSpec Modbus: reading solar inverter data](https://ranaliz.com/en/blog/sunspec-modbus-inverter-registers)
- [How to test an IEC 60870-5-104 connection](https://ranaliz.com/en/blog/how-to-test-iec-104-connection)
- [Free Modbus Poll alternatives](https://ranaliz.com/en/blog/free-modbus-poll-alternatives)

## Summary

One app. Four protocols. Zero cost. macOS and Windows.

[Download iOT Tester](https://ranaliz.com/en/product/iot-tester) to simplify your protocol testing workflow.