Compass on Xiaomi Redmi 7: how to turn on, calibrate and use for navigation

Modern smartphones, including the Xiaomi Redmi 7, have built-in sensors that allow the device to be used as a full-fledged compass, which is especially useful for tourists, or for everyday tasks, from setting up a satellite antenna to finding the right direction in unfamiliar terrain, but many owners do not know how to properly activate and adjust the compass on their phone to show accurate data.

In this article, we'll explore how Redmi 7's digital compass works, which applications are best used, and why readings can sometimes be inaccurate, how to calibrate sensors, avoid common errors, and even use a compass without the Internet, and why magnetic interference in a city can knock down readings and how to fix it.

How does the compass on the smartphone Xiaomi Redmi 7

Unlike a mechanical compass that focuses on the Earth’s magnetic field, the smartphone uses a combination of several sensors:

• 🧲 The magnetometer is the main sensor that measures the direction and strength of the magnetic field, and it determines where the north is.
• 📱 Accelerometer - helps to adjust the readings when tilting the phone so that the compass arrow does not "float".
• 🌍 Gyroscope – stabilizes the image and improves accuracy when moving.
• 📡 GPS-Module – further specifies the location, but is not required for the compass to work.

Redmi 7 uses a magnetometer AK09918 (or similar), which is built into the InvenSense chip ICM-42600. This sensor is accurate enough for household tasks, but requires periodic calibration, especially after phone drops or strong magnetic influences (for example, if the phone has been lying next to the speaker or charger for a long time).

It is important to understand that the compass on a smartphone does not replace professional navigation devices in conditions of strong magnetic anomalies (for example, in mountains or metal structures), but for urban conditions or trekking in the woods, its accuracy is usually sufficient.

How to turn on a compass on Xiaomi Redmi 7: step-by-step instructions

Unlike some flagship models, the Redmi 7 does not have the default built-in Compass, but that’s not a problem – you can use the feature through:

1. The standard Google Maps application (there is a built-in compass).
2. Third-party apps from Google Play (such as Compass from Lexa Fitness or Digital Compass).
3. Developer mode (to check the operation of sensors).

The easiest way to do this is to use Google Maps:

Open the Google Maps app

Click on the blue dot (your location)

In the window that appears, you will see a compass arrow and degrees

Tap the compass twice to go into navigation mode

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If you want a separate app, install Compass from Google Play.

1. Open the app.
2. Follow the instructions on the screen for calibration (usually you need to rotate the phone on the axis of "eight").
3. Ready - an arrow will appear on the screen pointing to the north.

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If the compass in the app shows incorrect data, try calibrating the sensors manually through the engineering menu (instruction below).

Calibration of the compass on Redmi 7: why it is important and how to do it

Over time, the sensors of the smartphone can “get lost” due to:

• 🔋 Battery discharge below 15% (sensors start saving energy).
• 💥 Phone hits or falls.
• 🧲 Prolonged stay next to magnets (earphones, magnetic lock cases, induction charges).
• 📶 Strong electromagnetic fields (e.g., near transformer booths).

To get that accuracy back, you need to calibrate the magnetometer, and you can do this in two ways:

Method 1: Calibration through the application "Compass"

Most third-party apps offer built-in calibration, such as Compass by Lexa Fitness:

1. Open the app.
2. If the compass arrow rotates randomly, a notification will appear, "Low accuracy. Calibrate the sensor."
3. Follow the hints on the screen – usually you need to rotate the phone on all axes (up-down, left-right, eight).

Method 2: Calibration through the engineering menu (for power users)

If standard calibration does not help, you can use the hidden engineering menu:

1. Open the Phone app and type ##4636###


2. Select "Sensor Testing" (Sensor Testing)




3. Find the line "Magnetic field"




4. Put the phone on a flat surface and press "Calibrate"




5 Repeat the eight movements until the success message appears.

After calibration, check the compass accuracy by comparing it to a mechanical compass or map. 10-15°, repeat the procedure.

The best compass apps for Xiaomi Redmi 7

Standard facilities MIUI It's not always compass-friendly, so users install third-party apps, and we tested a few popular options and made a table with their features:

For most tasks, a free Compass from Lexa Fitness is enough. If you need advanced functionality (for example, recording tracks or recording tracks). AR-Check out the Digital Compass or Compass 360 Pro.

Google Maps

Compass (Lexa Fitness)

Digital Compass

Other

I don't use a compass.-->

Typical Compass Errors on Redmi 7 and How to Avoid Them

Even after calibration, the compass can show incorrect data, most often due to:

⚠️ Warning: If the phone is on a metal surface (such as a car or refrigerator), the magnetometer will get knocked down. Always hold the device in your hand or put it on non-metallic objects.

• 📵 Lack of signal GPS — compass works without GPS, But to be precise, you need a satellite signal. → Security and location → Regime. → High precision).
• 🔄 Misdirection of the phone - hold the smartphone parallel to the ground (screen up).°, evidence may be distorted.
• 🔋 Battery savings - in power saving mode, the sensors turn off. Turn it off in Settings → Battery and productivity → Energy saving regime.
• 🧭 Magnetic interference – avoid using a compass near electronics, metal structures, or powerful speakers.

Another common mistake is to ignore magnetic declination, which is the angle between geographic and magnetic north, which varies by region. +11°, and Krasnoyarsk — +5°. Keep this in mind when you are navigating accurately.

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Before an important hike, check the compass away from metal objects and electronics. If the arrow consistently points in one direction for 30 seconds, the sensor is calibrated correctly.

How to use a compass on Redmi 7 without the Internet

Many people think that the compass needs the Internet to work, but it's not. The magnetometer works autonomously. GPS (If it's on, it's getting data from satellites, not from the mobile network:

• 🌐 Offline maps – if you use a compass with maps (like Google Maps or OsmAnd), download offline maps of the region in advance.
• 📡 GPS Internet-free – the first search for satellites can take up to 5 In the future (with continuous use) the signal is captured by the 10-30 seconds.
• 🔄 Compass cache – some applications (e.g. Compass 360 Pro) allow you to save the latest coordinates and direction for quick access.

To prepare your phone for offline navigation:

1. Download offline maps in Google Maps (Menu) → Offline maps → Select an area).
2. Install the OsmAnd app – it supports detailed offline maps with trail marks and landmarks.
3. Check the compass in the plane mode (disable the mobile network, but leave it alone). GPS included).

When hiking or traveling, keep your phone in energy saving mode, but with it on GPS. This will extend the battery life without recharging.

Advanced functions: compass + GPS + AR-navigation

If you want not only a compass needle, but also advanced navigation capabilities, consider a combination of several tools:

• 🗺️ AR-navigation – applications such as Google Lens or AR GPS Compass superimposes direction of movement on the camera image, useful for orientation in an unfamiliar city.
• 📍 Tracking routes – OsmAnd or Locus Map allows you to record the path traveled and return on it back.
• 🧭 Geocaching is a treasure trove game where a compass helps to find hidden containers by coordinates (appendix c:geo).

For activation AR-Google Maps mode:

1. Open the app and select a route.
2. Click on the camera icon in the upper right corner (will appear after navigation starts).
3. Point the camera at the surrounding buildings – arrows and clues will appear on the screen.

For geocaching, set c:geo and:

1. Register at geocaching.com.
2. Enter the cache coordinates in the app.
3. Follow the compass tips and GPS, find a stash.

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If you travel frequently, buy an external battery (powerbank) with a capacity of 10 000 Mach. Navigation on. GPS and AR It quickly drains the Redmi battery. 7 (average 15-20% hourly).

FAQ: Frequent questions about the compass on Xiaomi Redmi 7