How to use the IR port on Xiaomi Redmi: setup and management

Smartphones are no longer just instant messaging devices, becoming universal remote controls for all surrounding electronics. Owners of Xiaomi devices, especially the popular Redmi and POCO series, often do not even realize that a powerful infrared transmitter is hiding at the top of their gadget. This technology, known as IR-Blaster, allows you to control almost any household appliances without having to search for original remotes or buy complex universal systems.

The main task of the built-in IR port is to emulate the signals of conventional remote controls that operate in the infrared spectrum. Unlike Bluetooth or Wi-Fi, infrared radiation does not require pairing devices or connecting to a single network, which makes the control process instant and reliable. Just point the phone at a TV or air conditioner receiver, and the command will be executed if the application is correctly configured.

In this article, we will discuss in detail how to activate and configure this functionality, which applications are best for working with an infrared port, and how to solve typical problems if your smartphone has stopped “seeing” household appliances. You will learn about the intricacies of frequency calibration and why some models may not support this feature, despite the presence of a hole in the case.

Technical features of the IR emitter in Xiaomi smartphones

The infrared port in Xiaomi smartphones is a miniature LED operating in a spectrum invisible to the human eye, usually located on the top end of the device, next to a noise reduction microphone or proximity sensor, and is based on modulation of a light signal of a certain frequency, which can be decoded by the receiver of your TV, audio system or projector.

It's important to understand that IR is unidirectional and requires a line of sight between transmitter and receiver, which means that the signal will not pass through walls or massive obstacles, unlike Bluetooth or Wi-Fi radio waves. However, this feature ensures high accuracy of commands and no delays, which is critical when watching videos or controlling game consoles.

Not all smartphones have this module, but in budget and some mid-range models, the hole on the upper end can be just a microphone. To check for an IR port, you can use the specification on the official website or try to run the Mi Remote app - if the module is not, the system will give a corresponding warning when you try to add the device.

• 📡 Operates at a frequency of about 38 kHz, which is the standard for most household appliances.
• 🔋 Consumes a minimum amount of energy, almost without affecting the autonomy of the smartphone.
• 📏 The range of action is from 5 to 10 meters depending on the power of the emitter and external conditions.
• 🔄 Supports emulation of hundreds of different code tables from different manufacturers of equipment.

⚠️ Attention: Infrared port requires line of sight. If there is a vase or a person between the phone and the TV, the signal may not pass.

While mobile IR technology has come a long way, while slow IR ports were used to transfer data between phones (such as contact cards), modern modules at Xiaomi are designed exclusively to control the outer periphery. The speed of command is so high that pressing a button on the screen is displayed almost instantly on the TV.

Mi Remote app: Installation and initial setup

The main tool for managing equipment in the Xiaomi ecosystem is the Mi Remote app (in some regions it may be called Mi Remote) which is already built into the MIUI or HyperOS shell, so in most cases you do not need to download additional files from the Internet. If you accidentally delete the system application, it can be found in the Tools folder or downloaded from the GetApps store.

Once the application is launched, the system will ask you to provide the necessary permissions, and it is critical to allow access to location and Bluetooth, as these features are used to more accurately determine the region and select codes, even if the control is through an infrared port. Without these permissions, the code database may not work properly.

The interface is intuitive: in the center of the screen are virtual buttons remote, and on top of the tabs to switch between added devices. To start, you need to click the button “+” or “Add remote”, then select the category of the device (TV, air conditioner, console, etc.) and the manufacturer’s brand.

The process of adding the device involves testing the signals, and the app will alternately send out test commands, and you will need to confirm whether the equipment responds to them, which can take several minutes, but ensures that the selected configuration will work steadily in the future.

• 📱 Automatic definition of TV model from the database of brands.
• 🎨 Possibility of changing the theme of the virtual remote design.
• 🔍 Device model code search function for accurate selection.
• 🗣️ Voice control support via Google Assistant for some features.

⚠️ Warning: If your TV is old and doesn’t show up in the list of popular brands, try selecting the Others option or searching by the model code listed on the back of the device.

Step-by-step: how to add a new device

The process of pairing your smartphone with your appliances requires attention, but it's simple enough for any user. The first step is to turn on the device you're planning to operate. The TV or air conditioner should be in working mode so you can see the response to the signals being sent.

Then open the Mi Remote app and click on the add-on icon for a new remote. Select a device type, such as "TV." In the list that appears, find the manufacturer of your equipment. If the brand is not on the list, search or select a universal code.

The system will give you a series of tests. You'll see buttons on your phone screen, and the app will say, "Do you see the reaction?" or "Did anything change?" Press the buttons and watch the technique closely. If there is no reaction, press "No" and the system will try another code. If the technique responds, confirm success.

Once you've completed the test, remember to give the remote a clear name, like "Living room TV" or "Bedroom Air Conditioning," which allows you to quickly switch between devices if you have multiple devices, and you can also set up the power button: in some cases, it can only turn off the app, not the TV itself, which requires additional adjustment in the remote menu.

It is important to note that some complex devices, such as smart air conditioners with displays, may require manual calibration.If standard codes do not fit fully (for example, temperature control does not work), try to find codes in the database for older or, conversely, newer models of the same brand.

Alternative applications for IR port management

While Xiaomi’s standard app is the most optimized, there are situations where it’s not functional enough or it doesn’t work well on a particular smartphone model, and third-party development often comes to the rescue, often with broader codebases and flexible settings.

One of the most popular solutions is the Peel Smart Remote app, which features a modern interface and teleguide feature that allows you to use the phone not only as a remote control, but also as a transmission schedule. Another powerful tool is ZaZa Remote, which is famous for its huge base of code for air conditioners and manual frequency selection.

Using third-party software may require additional permissions and customization. Some applications may request access to the camera for scanning. QR-Pre-installing the test codes for the models or the microphone for voice commands. Read the reviews carefully before installing them to make sure they are compatible with your version of Android.

It’s worth remembering that third-party apps may contain ads that will be displayed when you start or switch channels. In paid versions, developers usually remove ad units and add cloud synchronization of settings between devices.

• 📺 Peel Smart Remote – the best interface and integration with TV programs.
• 🛠️ ZaZa Remote – Maximum number of supported codes and manual settings.
• 📱 Sure Universal Remote – support not only IR, but also Wi-Fi devices.
• 🎛️ Anymote – the ability to create macros and complex management scenarios.

Diagnosis and elimination (Troubleshooting)

Even with a functional IR port, users can experience situations where the phone stops operating, and one of the most common causes is a software failure in the module drivers, in which case a simple smartphone reboot helps, which resets temporary system errors.

Another common problem is contamination of the IR emitter hole: Dust, pile from a cover or a protective film that is not tidy can block the signal. Regularly wipe the upper end of the device with soft dry cloth to ensure unimpeded transmission of infrared waves.

If the remote is unstable with only one particular device, you may have lost the battery in the remote itself (if you use the cloning function) or you may have lost the channel settings. Try removing the remote from the application and adding the device again by selecting an alternative code from the database.

⚠️ Warning: Never attempt to clean the IR port hole with sharp objects or alcohol.This can damage the LED or lubricate the oleophobic coating around the sensors. Use only dry microfiber.

In rare cases, the problem may be a MIUI update that changes the driver experience. If the IR port stopped working after the firmware update, check the application settings in the Permits section and make sure that access to the hardware was not limited by the power saving system.

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Helpful tip: To check if the IR port is visually working, turn on the camera on another phone and hover over the top end of your Xiaomi. Press the button in the remote app. If you see flashing purple or white flashes on the camera screen, the emitter is good.

Scenario creation and management automation

Owners of Xiaomi devices with Mi Home ecosystem support can take the use of the IR port to the next level by creating automated scenarios. Although the IR port itself has no feedback, it can be integrated into time- or geolocation-driven action chains.

For example, you can set up a “I’m at home” scenario that, when you connect your smartphone to your home Wi-Fi, automatically turn on the TV and set the volume to the right level. Or a “Cinema” scenario that dims the light (if you have smart lights) and switches the signal source to HDMI.

And the IR remote and the voice assistant Google Assistant or Alexa can work together to control voice technology, even if the TV itself doesn't have smart functions. You just say a command, the phone broadcasts an IR signal, and the technology does an action, which is especially convenient for the elderly or disabled.

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The combination of an infrared port and a smart home turns a conventional “stupid” appliance into part of an automated system without the need to replace appliances.

Using macros in third-party applications allows you to record command sequences, so you can turn on the receiver, wait 2 seconds, turn on the TV and switch it to the desired input, which saves time and eliminates the need to use multiple remotes at the same time.