Infrared port on Xiaomi phone: the full guide

Modern smartphones are full of technology, but some of the features that seem like a relic of the past are returning in a new guise, one of which is the infrared port that Xiaomi is actively introducing into its devices, and many users, when they see a small black window on the top end of the case, wonder about its purpose.

In fact, it's a full-fledged signal transmitter that allows you to turn your gadget into a universal remote control. Unlike Bluetooth or Wi-Fi, the IR port is line-of-sight and does not require complex pairing, which makes the control of household appliances fast and intuitive.

Xiaomi, Redmi and POCO smartphone owners have a pre-installed app that scans databases of thousands of devices, so you don't have to look for an air conditioner or TV remote if the phone is always at hand, and let's take a look at how it works and which models support it.

The principle of the IR emitter in a smartphone

Technically, an infrared port is an LED that emits light in a spectrum that is invisible to the human eye. When you press a button on the screen, the phone generates a special code that is converted into a series of flashes, and these pulses are picked up by the receiver on the TV, refrigerator or air conditioner.

The main difference from radio channels is that you need a line of sight, you don't get around obstacles, you have a limited range, usually between 5 and 10 meters, but it's very reliable, because you don't accidentally switch the channel to the neighbor behind the wall.

⚠️ Note: The IR port does not require Bluetooth or Wi-Fi setup to work. It activates automatically when the remote application is launched, consuming minimal battery power.

Xiaomi smartphones use a built-in module that does not protrude outside the body, and it requires software emulation of protocols from various manufacturers, which is why it is so important to choose the right brand and model for your device in the application.

Compatible Xiaomi, Redmi and POCO models

Not all budget and mid-budget models have an IR port, as this requires additional space inside the case and costs for components, which is usually present in flagship series and mid-plus devices.

To find out for sure if there is a port in your device, check the top end of your smartphone. Near the microphone or noise reduction hole should be a small round black glass.

Below is a table of popular series, where this function is most often found:

It is worth noting that in some global versions (Global Version), the manufacturer can omit the module, leaving it only in Chinese versions (CN Version), so when buying a smartphone from hand or in small stores, it is better to check the presence of the eye visually.

Set up the Mi Remote application for management

To activate the function in the shell MIUI or HyperOS, the standard application "Mi Remote" (or "DU Remote") is used. It does not require installation from third-party sources and is already optimized for working with the hardware of the phone.

The first run of the program will ask you to add a new device, and the interface is divided into categories: TVs, air conditioners, set-top boxes, projectors, and even some types of audio equipment, and choosing the right category is critical to finding the right code.

The process of pairing is as follows:

• 📱 Select the category of the device (for example, "TV") and the manufacturer's brand.
• 🎯 Point the phone at the equipment and press the test button (usually "Enable").
• ✅ Confirm the device's response ("Yes, it works" or "No, it doesn't respond").
• 💾 Save your profile by giving it a clear name, such as "Living Room Television".

If the automatic search didn't work, you can use manual mode, in which case you need to know the exact model of the TV or air conditioner, sometimes the "blind brute force" method, where the phone tests hundreds of combinations of signals in a row, helps.

Expanded opportunities and use cases

The IR port is not limited to just switching channels, it allows you to create complex macros and scripts, for example, one button can turn on the TV at the same time, transfer it to the desired location. HDMI-login and run the media player.

This is especially useful for air conditioning, and often the remotes are lost or have an uncomfortable interface, and the smartphone allows you to accurately set the temperature, fan speed and operating mode, even if the original remote has only three buttons.

⚠️ Warning: When operating air conditioning via phone, make sure the screen is unlocked.Some phone models can block IR radiation in sleep mode to save energy.

Another interesting feature is the ability to share remote profiles, so if you set up control in the country, you can send the configuration file to another Xiaomi user via Mi Share, which eliminates the need to re-test the signals.

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Use Mi Remote widgets on the home screen, allowing you to turn on the TV or change the temperature of the air conditioner with a single touch, without opening the application itself.

Comparison with Bluetooth and Wi-Fi remotes

Many modern TVs support Wi-Fi control, but IR port has undeniable advantages, most notably universality, and infrared signal is understood even by the old kinescope TVs of the 90s, which have no Internet connection.

Also, the IR port works without delay. Wi-Fi signal can suffer from interference on a congested network, especially if the router is far away. Infrared pulse arrives instantly, which is important when typing or fast games.

But there are downsides, and as I said, you need direct visibility, and if you hide your phone behind the couch, you're out of control, and Bluetooth and Wi-Fi are through obstacles, which is sometimes more convenient in larger spaces.

Comparison of key characteristics:

• 📡 Range: IR up to 10 meters, Wi-Fi up to 30 meters indoors.
• 🔋 Energy consumption: IR has little effect on battery power, unlike the constant search for Wi-Fi networks.
• 🔒 Security: the IR signal cannot be intercepted from the next apartment, it is directed strictly towards the receiver.

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The infrared port remains a no-contest solution for managing climate equipment and old equipment that does not have Smart-functions.

Frequent problems and ways to solve them

Sometimes users are faced with a situation where the phone stops seeing the devices or the signals become unstable, most often the problem lies in the software failure of the application or contamination of the emitter.

First, check if there's a protective film or a cover covering the eye on the top end, and even a thin layer of plastic can significantly weaken the signal, making it impossible to control from more than one meter away.

If everything is physically clean, try clearing the app cache:

1. Go to Settings → Applications → All applications.
2. Find the Mi Remote (or Remote) list.
3. Select Clear Data → Clear Cache.

In rare cases, resetting the IR module itself through the engineering menu helps, but the average user is better off limiting himself to reinstalling system updates. Also make sure that the application has all the necessary plugins for specific brands of equipment.

⚠️ Note: Do not use third-party apps from the Play Market to manage your IR port if the Xiaomi app is not working properly.

Prospects of technology in new smartphones

Despite the development of the Internet of Things (IoT), Xiaomi continues to keep infrared ports in many models, which is because smart home adoption is slow and most people still have conventional technology that requires infrared control.

Future HyperOS updates will see a deeper integration of the remote with the voice assistant, so you can say "turn on the movie," and the phone will activate the TV and media center itself, using an IR signal to wake up the screen.

The technology remains relevant as a backup control channel, and even if your smart home falls down due to server or router issues, the infrared port will allow you to manually turn off the lights or air conditioner.