Perhaps the best USB tester WEB-U2. Large color screen, trigger of charging protocols, external power.

I agree, many are already fed up with the orderUSB testers, electronic loads, and all that sort of stuff. But friends, the hero of today's review, is something else that stands out from this whole crowd and is really worth attention. WEB-U2 - can be called if not the best, but at least one of the best USB testers of our time. It boasts such a set of functions and features as: a large 1.77 inch color LCD display, a trigger for almost all modern types of charging including PD, external power supply via microUSB port, saving all information in its own memory for up to 7 days, working in conjunction with a PC and many more to others.

The WEB-U2 model is a kind of clone on YZ1280 fromfamous Chinese team YZXstudio. At the same time, talking about 100% copying is impossible, because it is not. U2 has redesigned circuitry and other software. As for me, this option turned out even better than the "original". It added a number of interesting features that are not in the ZY1280, and the price tag is more humane (on average $ 35 versus $ 55).


Comparison table from the manufacturer. By the way, old versions cannot be found on sale right now, only current ones.

Software and firmware:
Program for PC (ENG)
Firmware v4.0
Firmware v4.4
Firmware v5.2
User Manual (CN)
User Guide
Packaging and appearance
The tester arrived in a metal box already familiar to us with a transparent window on the front side. In exactly the same were numerous options from RD and from YZXstudio.

In addition to the device itself, there are alsoa small paper booklet with a QR code and a link to a group in QQ: 660597526. I mentioned it here for a reason, because all the firmware updates and other programs related to WEB products are laid out there. Entrance to the group is not free, but for some reason I was easily accepted)).

Appearance, again we are already familiar with thismodels from RD and YZXstudio. The dimensions of the case have become a little larger, like the display, but the general concept of the structure has remained the same. This is a kind of sandwich of several separate parts interconnected by screws and the absence of a case as such. Of the pleasant, the presence of protective acrylic glass on the front side can be noted. The ZY1280 does not have it, yes, as in the ZY1276. With the latter, I got out of the situation by simply pasting a protective film on the screen itself.
The tester is rich in a wide range of interfaces: USB-A (male) for input, USB-A (mother) for output, USB-C for one input, another for output, microUSB one for input for connecting third-party devices and a second microUSB HID for connecting an external power source. Management is implemented by two buttons "OK" and "M", located on the upper end.

On the reverse side you can see a brief technical specification and graphic tips opposite each of the ports or buttons.

USB ports are reinforced here, because they shouldwithstand current up to 5A. This is especially noticeable at the USB-A (male) input, in which the extreme contacts responsible for the power part are made much wider than those needed for data.

The main interfaces of WEB-U2 in the form of a circuit:

An external microUSB input can also be connected.temperature sensor, which is sold separately. With it, you can track the temperature of the device under test, for example, when charging a phone, a bank.

The physical dimensions of WEB-U2 are slightly smaller than those of the ZY1280 counterpart and are equal: in length, taking into account the USB port, is 66.9mm, in width - 34.5mm and in thickness - 12.7mm.

Well, the photo next to the ZY1276 USB tester.

Internal structure
Let's consider in more detail the schematic of the herotoday's review. The design is disassembled, as is the case with the closest competitors very quickly and easily. We take any suitable Phillips screwdriver and unscrew all eight screws. After that, the “sandwich” breaks up into several separate parts, such as the upper acrylic glass, the front lining of the PCB, going under it and the same lining on the back side.
I’d like to immediately pay attention to howThe back plate looks. Firstly, it has a transparent bluetooth icon, and secondly, there are contact pads for the chip itself and controls. Apparently in the future it plans to release a version with a wireless connection, but so far, at the time of writing, it is not yet available.

The tester, as we see, consists essentially of one,main board with connectors. On the front side there is a large LCD display with a diagonal of 1.77 inches. Let me remind you that in direct competition from YZXstudio - ZY1280 costs exactly the same. But in previous models it was smaller, by 1.44 inches. Nothing more interesting here we do not see.

Turn over to the back side. Here the situation is already more interesting. The layout of the elements on the board is very dense, there is practically no empty space. The guys from WEB approached this issue more rationally, so they were able to eventually make a more compact body than the ZY1280. The elemental base is as follows, acts as the main microcontroller STM32F072CBT6 - 32 bit chip with 128KB flash memory, current shunt DALE R012F - 0.012 ohm resistor, FRAM memory RC16 at 16Kb, MDDCM - Schottky diode and other small things, A411N - presumably G-sensor (accelerometer) from NXP, All branded connectors, from Krconn and Foxconn.

Soldering elements is neat, without snot, but there are many traces of unwashed flux.

The manufacturer focuses on this, they say we have everything branded, not the basement)).

To begin, we will deal with hidden menus, whichthere are two. Entrance to the first of them is carried out by pressing the OK button and applying power to the tester. A black background with the words PC USB and DFU is displayed on the screen. In this mode, the firmware is being updated, I think it’s clear with this. Entrance to the second hidden mode is performed by the same actions, only with the “M” button held down. A menu opens with a lot of subtle settings. It also displays the current model of the device, firmware version, serial number (by the way, it coincides with what is indicated on the box), the number of starts. It is possible to change the language from Chinese (default) to English, font size from large (L) to small (S), select the brightness of the active mode display (from 1 to 16 points), the brightness in standby mode (from 1 to 16 points ), waiting time (from 0 to 255 minutes), enable or disable the HID port (i.e. PC visibility), load data into the tester’s memory, adjust the current value from which the counters will be activated, write to the tester’s memory (from 1 hour to 7 days), real-time display of voltage graphs on date lines (D + D-), calibration by voltage (10V) and current (2A), calibrate internal and external temperature sensors, disable or enable the G-sensor, auto-rotate, automatically turn on the screen at a given current level, enable or disable automatic recognition of the MTK-PE protocol in the trigger, clear all data and reset to factory settings.
With each new firmware update, this rather big list is supplemented by new items. There are a lot of settings, you can adjust and tune the tester as you want it.

Now let's move on to the operating modes. There is no starting greeting, as in ZY1276, but it is in ZY1280. The truth is not from him, an extra waste of resources. The tester is turned on from the last selected virtual table, which by the way there are eight of them. Let's start in order with the first of them. This is the simplest screen in terms of information content, it is displayed in large font in the center:
- current voltage (V),
- current current strength (A),
- current power (W),
By default, the capacity is fourdigits after the decimal point, but you can expand it to five by pressing the OK button once. The change between the desktops, as you probably guessed to happen, by a single click on the "M" button (menu). Holding it for a long time forcibly unfolds the screen (90, 180, 360 degrees). Still on this table in the upper right corner there are small icons, we will figure out why they are needed. They are displayed almost everywhere. The letter T is responsible for the G-sensor, i.e. if we turn it off through the settings menu, the icon will be grayed out, if enabled, it will turn green. The letter "C" as I understand it is connected with the work of the bluetooth, but we do not have it, so it is always gray. Round arrow - indicates whether auto-rotate is enabled or not. “S” - when paired with a PC, it glows green. Also, a red dot may flash at the edge, indicating that data is being recorded at the current moment.

The next screen is divided into three fields, the central one displays:
- current voltage (V),
- current amperage (A),
- Ampere counter - hours (Ah),
- Watt-hour meter (Wh)
On the right, in the form of a column, readings A \ h and W \ heach group, of which there are six. The temperature, group number and activity status (RUN) are displayed below. Status lights up green - the tester counts and displays current information, status red - readings freeze, a kind of screenshot.
Forced screen rotation is also available, but only 180 degrees and vice versa.

The third virtual screen is also divided as the last into three separate fields, in the center it is displayed:
- voltage (V)
- current (A),
- power (W),
- resistance (Ω).
On the right side: maximum, average and minimum values ​​for voltage, current and power. In the field below - temperature, activity status (RUN) and Bluetooth backlight operation status (LED). A long hold of the “M” button resets all field counters to the right.

The fourth screen is perhaps one of the most useful and interesting. In the center, large text displays:
- voltage (V)
- current (A),
- power (W).
On the right is the temperature of the internal sensor,temperature of the external sensor and set current value for waking up from sleep. Below in the form of a separate table we see the current protocols of charging and voltage on the data lines. Long holding the “OK” button changes the temperature between degrees and Fahrenheit. A long hold and subsequent pressing of the "M" button puts the tester in the trigger mode of charging protocols. A new window opens in which, at the top we see the current voltage, and at the bottom a large list of protocols. It includes 17 points, the first of which is the automatic recognition of all charging protocols supported by the tester. After entering the auto trigger, the tester performs a quick check and marks in green those protocols that are in the device under test. Red are marked unsupported. Each of the types can be checked separately manually:
- QC 2.0
- QC 3.0
- QC 2.0 to PD
- PD Trigger
- PD Listener
- Apple PD Adapter Check
- PD E-Marker
- MFI Detection
- Huawei FCP
- Huawei SCP
- Samsung AFC
- Vooc Dash
- Vooc virtual cable
- VIVO Flash
- Apple 2, .4A
- Charger Tool
Last of this list, Charger Tool moderemained for me not entirely clear. If I think correctly, its main task is to prevent the device to which the tester is connected from falling asleep. And this is actually so, for a short time a small load is applied to the port, which in the end does not allow you to go to sleep. Why it may come in handy until I came up with.

Auto trigger mode is very convenient, especiallythe presence of the MTK-PE protocol. Many probably remember one of my last reviews of the external battery from Powerseed, there I had to use ZKE-EBD +, in addition to the ZY1276 usb tester, to check for support for the MTK-PE protocol. Now with WEB-U2 in your hands, you don’t have to do this anymore.

When testing output with PD supportand its maximum power. Supported profiles are displayed, just like in ZY1276. In the photo below, the external battery ZMI QB820 with PD 40W support.

The tester also has cable authenticationlightning for apple or in other words the presence of a certified chip in them. In the first photo, the test with the native cable from the iPhone 7 phone, as you can see everything is good, it is genuine. And here's the second one, recently purchased with a stock on JD, a cable from Snowkids with the announced MFI. For some reason, the tester recognized it as a fake. Errors, I think it can happen, will be corrected with the firmware update over time. It cannot be ruled out that the cable is real without a certificate, but unfortunately I can’t determine exactly. It is important not to forget that for this test the power supply to which the tester will be connected must be with QC3.0 support (as stated by the manufacturer).

Also, for apple trees, a check is provided forauthenticity and PD-enabled chargers. Below is a photo from the seller with an example of how it looks in practice. The tester can read the serial number of the device, after which it can be verified with what is indicated on the case of the unit itself and its presence in the Apple database.

Let's go back to our screens, the sixth in line. It displays the following information:
- voltage (V)
- current (A),
- temperature of the internal sensor,
- temperature of the external sensor,
- Ampere counter - hours (Ah),
- Watt-hour meter (Wh),
- power (W),
- group / total group number,
- the minimum current value from which recording and counting will start,
- tester on time,
- recording time
- lower band with percentages showing free memory (taking into account the time set by us in the settings).
Counters can be reset by long holding the button“OK”, a single click on it switches the group number. A long press of the "M" button displays on the whole screen either the temperature or the list of counters with Ampere - hours (and Watt - hours above) and time for all six groups.

The seventh screen is a voltage drop test. With its help, the resistance of the cables under different loads is checked. The principle of operation is exactly the same as in RD UM25 \ 24 and ZY1276 and consists in the fact that first we connect the tester directly to a power supply with a pre-set load, click on the “OK” button and then add a cable (between the power supply and tester).

Made a small express analysis of two differentcables (microUSB and Type-C) with a load of 1A. The first is Orico at 0.8m, and the second is Joyroom at 1m. Orico at this load has a resistance of 0.10 Ohms, and Joyroom 0.26 Ohms. Conclusion: the first is much better than the second.

The next screen is kind of primitiveOscilloscope, which displays the graphs of voltage, current. There is a conclusion of values ​​on date lines, as well as a graph of the history of indications for the time set in the settings. The refresh rate is selected from 0.2 milliseconds to 5 seconds.

Last desktop - with not only disabledbacklight, but also the screen itself. It serves to reduce own consumption and the errors introduced by it in the measurement results. In fact, it is not particularly needed here, because there is an input for external power. But for reference, I will indicate that in normal mode the consumption is - 0.034A, and with the screen off - 0.018A.

By connecting an external source we not only cut offconsumption of the tester itself from the substation device, but it can also work with low-voltage power elements, for example, 18650 batteries with an average voltage of 3.7V. The photo below is an example of such a bundle.

The USB HID port is also used to connect to a PC, work in tandem with it, and firmware updates. The program has a name U2 Meter 1.0Beta and is officially available only in Chinese. I posted it with custom English, so it will be clearer for us. We install it on the computer and connect the tester, while you do not need to install any drivers. The interface and functionality are still very primitive and meager. But then through it you can very easily make firmware updates, even close to not compare with what was in ZY1276. Download the latest version v4.0, we unpack to where it is convenient for us, further inapplication, switch to the Upgrade tab, put the tester in firmware mode (hold the OK button and connect to the PC), select our file in the corresponding field and start the process. It takes less than a minute, that's all. You do not need to solder, disassemble or buy special devices.

And of course, in the end you can’t forget to mentiontwo unusual pieces of the WEB-U2 model. Due to the presence of a sensor, switch desktops, i.e. virtual screens can be double-click on the body of the tester. Unusually agree, I have not seen this before.

There is also an automatic screen rotation depending on the tilt, which is also very convenient by the way.
Both chips can be left to work or disabled individually through the settings menu.

What can I say by the end, WEB-U2 is excellenttester, convenient and functional. It has many advantages over its competitors. A nice color screen with a large diagonal of 1.77 inches allows you to fit a lot of useful information at once. Special thanks for the acrylic glass, which serves as a protection against mechanical impact on the screen. There is an external power supply, which opens up the possibility of testing devices even with low voltage. Through the same input, communication and work with the PC is carried out (through a special application). Good support from the manufacturer, very often new firmware releases. In addition, the update mechanism is implemented in a convenient way, in almost two clicks. There is a trigger of charging protocols with all relevant types, including Power Delivery (PD), QC3.0, MTK-PE, etc.
Separately, we note the flexible configuration of the testerthrough the engineering menu, including calibration modes, additional chips in the form of auto rotation, G-sensor. And if you compare the price with Power-Z or YZXstudio, the products from WEB are more affordable and at the same time no worse, or even better somewhere.