How to increase the power of the Xiaomi router: from settings to upgrade antennas

Xiaomi's weak Wi-Fi signal is a problem that one in three owners of these devices face, and the reasons can range from incorrect settings to physical obstacles like concrete walls, but in most cases, the router's power can be increased without buying new equipment — just fine-tuning the existing one.

In this article, we will discuss 10 Proven ways to amplify the signal - from basic (change the Wi-Fi channel) to advanced (replace antennas and firmware alternative software). 3/4/4A/4C and AX-The series, because their settings have key differences, all recommendations are based on real-world user tests and official manufacturer manuals.

Importantly, not all methods are equally effective. For example, changing firmware can increase coverage by up to 30 percent, but requires technical skills. But optimizing router location often solves the problem by 50 percent at no cost. Let's start with the simplest and get to the hardest.

1. Optimal placement of the router

Before you go through the settings, check where your router is, and even the most powerful device is useless if it's shielded by metal objects or thick walls.

• 📍 The center of the apartment is the perfect place. The closer the router is to the geometric center of the housing, the more uniform the coverage.
• 🚫 Avoid kitchen and bathroom. Metal pipes, microwaves and ceramic tiles greatly weaken the signal.
• ⬆️ 1-1.5 meters high, a shelf or wall mount is better than flooring.
• 🔌 Farther from electrical appliances, refrigerators, TVs, even phone chargers are causing interference.

Do a simple test: Take a smartphone with Wi-Fi Analyzer (Android) or NetSpot (iOS) and walk around the apartment. -70 dBm, you need adjustments, for example, if there's a weak signal in one room, maybe you just need to move the router closer to it.

⚠️ Warning: Don't put your router in niches or behind furniture. Even a wooden cabinet can dilute the signal by 10-15%.

2. Change of Wi-Fi channel and bandwidth

By default, Xiaomi routers choose the channel automatically, but this algorithm is far from perfect. In apartment buildings, channel overlaps often occur when neighboring routers are operating on the same frequency, causing interference.

To change the channel:

1. Go to the router's web interface at the address 192.168.31.1 (The username and password are usually a combination admin/admin).
2. Go to Settings. → Wi-Fi (for dual-band models, select 2.4GHz or 5GHz separately).
3. In Channel, select the value manually. 2.4 GHz channels 1, 6, 11 (they do not overlap) are optimal. 5 GHz is any channel in the 36-48 or 149-165 range.
4. Save the settings and restart the router.

Also, pay attention to the width of the channel:

• 📶 20 MHz is the most stable option for 2.4 GHz, but at a slower rate.
• 🚀 40 MHz is faster, but can interfere with neighbors. Suitable for 5 GHz.
• 💡 80 MHz or 160 MHz – only for 5 GHz and modern devices (e.g. Xiaomi) AX3600).

To analyze the load of channels, use applications like WiFi Analyzer (Android) or AirPort Utility (iOS). If there are many networks nearby on channel 6, switch to 1 or 11.

3. Update firmware and reset to factory settings

Router firmware affects not only stability, but also signal transmission power. Newer versions often optimize antenna algorithms and power consumption.

1. In the router’s web interface, go to General Settings → Firmware update.
2. Click Check Updates. If a new version is available, install it.
3. After the update, reset the settings through General Settings. → Reset and reset.

Resetting to factory settings helps eliminate "digital debris" - accumulated configuration errors that can limit transmission power.

• 🔄 Set up Wi-Fi again (network name and password).
• 🔒 Restore the administrator password (by default admin).
• 📡 Select the optimal channel (see previous section).

⚠️ Note: On Xiaomi Mi Router models 4A Gigabit Edition after update to version 2.28.XX You may lose access to some settings, in which case, roll back to the previous firmware through Advanced Settings. → Firmware.

4. Transmission power setting (Tx Power)

In standard settings, Xiaomi routers limit the transmission power to comply with local regulations (for example, in the EU – up to 100 mW), however, in the web interface, you can increase this parameter.

For Mi Router models 3/4/4A/4C:

1. Go to Advanced Settings → Wi-Fi Settings.
2. Find the Tx Power (or Transmit Power) option.
3. Set the value of High or Maximum (if available).
4. Save the settings and restart the router.

For models AX-series, for example, AX3600 or AX6000):

1. Enable the Developer Mode through SSH (guideline).
2. Execute the command: nvram set txpwr=100 where 100 is power in percent (maximum 120, but not recommended to exceed 100 due to overheating).
3. Changes to: Nvram commit reboot

Increasing Tx Power above 100% can overheat the chip and shorten the life of the router, and use this method only when absolutely necessary.

Check the current router temperature in Status → System (must be below 60)°C)

Download backup of settings in Advanced Settings → Backup

Connect the router to the UPS (in case of a sudden power outage, a failure is possible)

Have a paper clip on hand for hardware reset (in case of hanging)

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5. Replace standard antennas with more powerful ones

If the software methods failed, consider hardware modifications: standard antennas in Xiaomi routers have a gain of 3-5 dBi. They can be replaced with antennas with 7-9 dBi, which will increase the coverage radius by 20-40%.

Suitable antenna models:

Replacement process:

1. Disconnect the router from the network.
2. Carefully unscrew the standard antennas (counterclockwise).
3. Connect new antennas and tighten them without undue effort.
4. Turn on the router and check the coverage.

⚠️ Attention: On Mi Router models 4C The antennas are soldered into a board, and they will require a soldering iron and electronics skills to replace them).

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Before you buy antennas, check the compatibility of connectors, for example, antennas with connector. SMA not fit for RP-SMA (polarity).

6. Use of alternative firmware (OpenWRT, Padavan)

MiWiFi stock firmware limits many of the router's functions, including transmission power and configuration flexibility. Alternative firmware like OpenWRT or Padavan allows:

• 📈 Increase Tx Power to maximum value.
• 🔧 Fine tune in QOS (Quality of service) to prioritize traffic.
• 🛡️ Install additional security modules (e.g. AdBlock).

Instructions for firmware Padavan (on the example of Mi Router) 4A):

1. Download the firmware from the official Padavan repository (select the version for your model).
2. Connect the router to the computer via cable.
3. In the web interface, go to Advanced Settings → Manual Upgrade.
4. Download the firmware file and wait until it is completed (the router will restart 2-3 times).
5. After installation, go to the new interface at the address 192.168.1.1 (login: admin/admin).

In Padavan, the transfer power is configured in the Wireless section. → Basic Settings: Tx Power can be set to 20 dBm (100 mW) and in some assemblies up to 30 dBm (1,000 mW), but exceeding 23 dBm may violate local radio frequency laws.

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The firmware of the alternative software voids the warranty and can lead to the router's "bricking"; always back up the original firmware before experimenting.

7. Connecting an external amplifier or repeater

If all the previous methods didn't work, consider hardware signal amplifiers, which come in two types:

• 📡 Repetitors – connect over Wi-Fi and relay the signal. For example, Xiaomi Mi Wi-Fi Range Extender Pro.
• 🔌 C-amplifiers LAN-Port: cables to the router and creates a new access point. Example: TP-Link RE605X.

How to set up a repeater Xiaomi Mi Wi-Fi Range Extender Pro:

1. Connect the repeater to the outlet next to the router.
2. Press the button. WPS on the router, then on the repeater (within 2 minutes).
3. Wait for synchronization (the indicator on the repeater will light up in blue).
4. Move the repeater to the weak signal area (but no further than 10 meters from the router).

For large houses (100)+ m2) optimally use a Mesh system, such as the Xiaomi Mesh System, which automatically switches devices between nodes, providing stable coverage.

8. Optimization of QoS settings and DHCP

Even with a strong signal, the speed can “sank” due to incorrect QoS (Quality of Service) settings and DHCP. These parameters affect the distribution of traffic and IP-address.

QoS setting (for Padavan firmware):

1. Go to Bandwidth Limiter → QoS.
2. Enable QoS on.
3. Install. Download/Upload on 90% from the real speed of your internet (for example, if the rate is 100 Mbps, point out 90 Mbit/s).
4. In Classification, prioritize traffic for video (YouTube, Netflix) and games (Steam, Battle.net).

Setting up DHCP (firmware):

• 🔄 Reduce Lease Time (Lease Time) IP) It's up to 12 hours (24 hours default), which will reduce the load on the router.
• 📋 Turn on Static. DHCP for permanent devices (television, printer) – this will speed up their connection.

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If you have many devices (10)+), shut down IPv6 customized LAN. This will reduce the load on the router processor and free up resources to amplify the signal.

FAQ: Frequent questions about increasing the power of the Xiaomi router