Modern smartphones of the Xiaomi brand have long ceased to be just communication devices, turning into universal tools for solving household and professional tasks. One of these is the connectivity of the outer periphery, such as digital endoscopes, which allow you to look into hard-to-reach areas of the car or check the condition of the pipes. MIUI It has its own characteristics of working with external USB-device.
The process of pairing a camera with a flexible cable and a smartphone is based on OTG (On-The-Go) technology, which allows a mobile device to act as a host. However, simply plugging a plug into the connector is often not enough: the system may not recognize the device without the right software or activating hidden settings. In this article, we will examine all the nuances, from choosing an adapter to setting up specialized software so that you can immediately start diagnosing.
It’s worth noting that not all models in the budget segment support video transmission through the charging port, so checking the specifications of your device will be the first step.We’ll look at universal methods that are suitable for most current models, including the Mi Note series, Redmi Note and flagship Mi. Ready to work will take only a few minutes, if you know exactly where to look for the right switches in the system.
Checking OTG support and smartphone compatibility
The first and most critical step is to make sure that your particular device is physically and software-capable of powering an external device. Unlike some other brands, the MIUI shell rarely features a separate OTG power button in the basic settings, as this feature is usually activated by default at the hardware level. However, if the smartphone is in the initial price segment, the power controller can block 5 volts per port to save battery power.
For quick check you can use a simple test: connect to the phone through the adapter conventional USB-If the notifications show a message about the connection of the drive or the file manager displays a new disk, then the port is in host mode. USB, which sometimes conflicts with the periphery, or try another cable.
It is also important to consider the Android version and the type of connector. Devices with a USB Type-C port tend to have better compatibility with modern endoscopes that have a similar plug. Devices with a Micro-USB connector will require a quality adapter that should also support data transfer, not just charging.
If the flash drive check is successful, you can safely move on to the next step, which is choosing the software, and the lack of system response to the drive connection often indicates a malfunction of the adapter or charging port itself, rather than a software limitation.
Selection and installation of specialized software
Most of the cheap endoscopes sold on marketplaces do not have built-in memory and require a real-time video processing application. Xiaomi's standard camera does not work with such external modules, so installing third-party software is mandatory. There are several popular solutions on the market, each of which has its own advantages and interface features.
One of the most common applications is OTG View or USB Camera. These programs automatically scan connected devices and offer a list of available permissions. For Xiaomi users, it is important to remember about the aggressive MIUI energy saving system, which can kill the background processes of the application.
- 📱 USB Camera is a versatile solution with support for many compression formats, often works where others pass.
- 📱 OTG View – the classic choice for budget endoscopes with chips AVR or JPEG.
- 📱 MaxSee – specialized software for more expensive models with swivel cameras and zoom.
- 📱 Depstech – the official application for branded endoscopes, providing a stable picture.
When searching Google Play or GetApps, pay attention to the application’s requirements: some require root rights, which is not desirable for most users. Modern versions of programs usually run normally using standard software. API Android for access USB-camera.
Secret functions of applications
Step-by-step instruction for connecting the device
The process of physically connecting and initially configuring requires sequential action to avoid driver conflicts. If you first connect a peripheral to your Redmi or Poco smartphone, follow this algorithm.
First, make sure the app is already installed and given all the necessary permissions to access the memory and microphone (if the camera has a built-in microphone). Then connect the OTG adapter to the smartphone. Only then insert the endoscope plug into the free port of the adapter, which allows the system to correctly initiate the process of detecting new equipment.
☑️ Checklist of connection
After the physical connection, a system notification of the connection should appear on the screen. USB-devices. if you use the application USB Camera, it often starts automatically. Otherwise, open the program manually and press the connection button, which usually looks like an icon. USB You should have your endoscope on the list of available devices.
⚠️ Warning: Never connect the endoscope to the port USB While the risk is minimal, static electricity can damage the smartphone's power controller.
If an image appears but it is black and white or rippling, try changing the encoding format in the app settings from MJPEG to YUYV or vice versa. Different camera models use different codecs, and automatic selection does not always work correctly the first time.
Set up image and recording parameters
Once a video stream is successfully launched, the user has a lot of options to customize the image. Standard settings are often too bright or dark, because endoscopes do not have high-level autoexposure. To get a clear image, you need to manually adjust the parameters in the application interface.
First of all, pay attention to the frequency of personnel (FPS). For smooth video, try to set the value 30 FPS, However, if the image begins to slow down, lower the resolution or frequency to 15-20 FPS. This is especially true for older smartphone models, whose processor may not be able to handle real-time decoding of high-quality streams.
| Parameter | Recommended value | Impact on work |
|---|---|---|
| Permission | 1280x720 or 1920x1080 | Clear picture, load on the processor |
| Format | MJPEG | Transmission speed, less delay |
| Brightness | 50-70% | Compensation for the absence of IR illumination |
| Contrast | 40-60% | Distinction of details in the shadow |
Many users forget about white balance, which leads to unnatural shades (blue or yellow).In the application settings, find the White Balance item and switch it to Auto mode or manually adjust it to lighting. Also useful feature is the ability to take pictures and record videos directly in the application, saving files to internal memory or on the computer. SD-map.
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Tip: For shooting in complete darkness (for example, in the engine or pipe) be sure to turn on LED-lighting on the end of the camera, adjusting its brightness with buttons on the cable, if any.
Solving Typical Problems and Errors
Even if you follow all the instructions, you can have technical difficulties. The most common problem is the black screen in the app with the camera connected. This often indicates that the app lacks access rights or another process has already taken over the camera. Close all background applications, including the standard camera and messengers (Telegram, WhatsApp), which can block access to the video module.
Another common situation - a message «USB-This means that the port power is not enough to operate the camera, especially if the bright light is on. LED-In this case, try to reduce the brightness of the LEDs on the endoscope cable or use an additional powered adapter.
- 🔌 No image: Check if the plug is tightly inserted before clicking (if it is Micro-USB).
- 🔌 Video brakes: Close the extra applications, lower the resolution in the program settings.
- 🔌 Phone warms: Normal reaction with long work, but it is better to take breaks every time 15-20 minute.
⚠️ Warning: If the smartphone gets too hot at the adapter connection point, immediately turn off the device, which may indicate a short circuit in the endoscope cable or a malfunction of the controller.
If nothing helps, try restarting your smartphone with an endoscope already connected. Sometimes the USB driver doesn't have time to initialize correctly when you're hot, and a cold start solves the problem.
Tips for operation and maintenance of equipment
The endoscope is a tool, and while it looks robust, the optical part is very sensitive to contamination.The camera at the end of the flexible cable is often stained with oil, dust or moisture. Rub the lens with a soft microfiber before each use, as the greasy spots when the backlight is on create strong glare that interfere with diagnosis.
The flexible cable cannot be bent at a sharp angle, especially at the exit point of the plug or camera, and inside is not only the video signal, but also the backlight power wires, which easily break when deformed. For storage, it is better to use a special box or roll the cable into a ring with a diameter of at least 10-15 centimeters.
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The quality of the diagnosis is 90% dependent on the purity of the lens and the correct choice of the application, not on the price of the endoscope itself.
When working with fluids, make sure your model has an appropriate moisture protection class (usually IP67).Even waterproof chambers are not designed for prolonged pressure immersion, so avoid using them to check pressure radiators or deep wells without special protection.