---
title: "IR21 IR Controller Firmware"
slug: "ir21-ir-controller-firmware"
updated: 2026-08-11T09:57:41Z
published: 2026-08-11T09:57:41Z
canonical: "knowledge.akuvox.com/ir21-ir-controller-firmware"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledge.akuvox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IR21 IR Controller Firmware

[Release Firmware (Click to download)](https://drive.google.com/file/d/1kSN8_n0K2msx1Hgguoa1nvtROCX4ftL9/view?usp=drive_link)

Version: V20

---

## **Release Notes**

### **Version: V20**

**Release Date:** January 16, 2026

#### **Fixed Bugs**

1. Fixed an issue where some infrared devices did not respond when a scene task controlled multiple IR devices simultaneously

> [!NOTE]
> **NOTE:**
> 
> - This fix requires the home center device to be running firmware version 3.4.3 or later.
> - Currently, up to three IR devices can be controlled simultaneously. For scenes involving more than three devices, delays must be added manually between tasks.

---

### **Version: V16**

**Release Date:** October 13, 2025

> [!NOTE]
> **NOTE:**
> 
> These enhancements require panels running firmware version 3.4.1 or later.

#### **Optimizations**

1. Optimized the gateway’s performance by improving learning-data cleanup and accelerating command transmission.

#### **Fixed Bugs**

1. Fixed an issue where the learned commands from the HP remote did not match the actual control behavior.