web-u2
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The U2 is a USB power meter and tester. | The U2 is a USB power meter and tester. | ||
- | It is full of features and makes it the most complete I known of: | + | {{: |
+ | {{: | ||
+ | |||
+ | ===== Overview ===== | ||
+ | |||
+ | ==== Features ==== | ||
+ | |||
+ | It is full of features and makes it the most complete | ||
* wide voltage and current range, with high precision: 0-24 V DC @ 0.00001 V, -5-5 A @ 0.00001 A (covers all standardized USB voltages and currents) | * wide voltage and current range, with high precision: 0-24 V DC @ 0.00001 V, -5-5 A @ 0.00001 A (covers all standardized USB voltages and currents) | ||
* multiple USB inputs (USB 3.1 type-A plug, micro-USB, USB-C) and outputs (USB 3.1 type A socket, USB-C) | * multiple USB inputs (USB 3.1 type-A plug, micro-USB, USB-C) and outputs (USB 3.1 type A socket, USB-C) | ||
- | * large clear LCD screen | + | * large (1.77 in / 4.5 cm) clear (can use large fonts) |
- | * can detect charger compliance/ | + | * can detect charger compliance/ |
- | * external power input: to not affect the current measurement, | + | * external power input: to not affect the current measurement, |
* computer interface to read the measured values: USB HIB (micro-USB port which also can externally power the device), and Bluetooth (U2p version) | * computer interface to read the measured values: USB HIB (micro-USB port which also can externally power the device), and Bluetooth (U2p version) | ||
+ | ==== Resources ==== | ||
+ | |||
+ | The manufacturer is called **WITRN**. | ||
+ | The device was first called **WEB-U2**, but now they registered the trademark/ | ||
+ | |||
+ | You can buy the [[https:// | ||
+ | The software also points to the probably authorized re-seller [[https:// | ||
+ | The manual warms about the [[https:// | ||
+ | |||
+ | The [[http:// | ||
+ | It only point to the user guide and software (with broken link).\\ | ||
+ | Instead they recommend to follow the QQ group 313755927. | ||
+ | |||
+ | Here links I could gather to get the latest version of: | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | |||
+ | There is also this thorough [[https:// | ||
+ | |||
+ | ===== Hardware ===== | ||
+ | |||
+ | There are several versions of the hardware. | ||
+ | |||
+ | ==== WITRN U2 104083 ==== | ||
+ | |||
+ | This is the first device I bought from the [[https:// | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | The original manufacturer blocked this device. | ||
+ | After flashing firmware version 5.5, the display would just show '' | ||
+ | Moreover it was not possible to re-flash it anymore. | ||
+ | Thus **don' | ||
+ | Software version 4.0 or later also do not work with this device. You need to use version 3.0.\\ | ||
+ | This device can still be used to measure voltage and current, but since there is no update anymore it will not be able to be used to detect charger profiles. | ||
+ | |||
+ | I read out the FRAM (where the settings are stored) but did not find the serial number in there. | ||
+ | I also cleared it to confirm the serial is not stored in the FRAM, but in the firmware. | ||
+ | Sadly the firmware is read protected. | ||
+ | |||
+ | There is also a footprint for an Bluetooth adapter behind the screen, but it was not placed yet (the software was probably not ready). | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ==== WITRN U2 V2.0 ==== | ||
+ | |||
+ | Because the clone was bricked, I got a genuine replacement. | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | A Bluetooth module could be placed on the front side of the bottom board. | ||
+ | The front board could also be light bz LEDs from the back side. | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | ==== Qway U2p ==== | ||
+ | |||
+ | The U2p version is a variant of the U2 with 4 button instead of 2, and a switch to enable Power Delivery probing | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Finally it was also possible to get a version with Bluetooth and some light next to the USB input (not sure when it is on though) | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | ==== Board ==== | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Here a list of the components present on the Qway U2p V1.1 board: | ||
+ | - input USB 3.0 type A plug | ||
+ | - input USB type C socket | ||
+ | - input USB type micro-B socket | ||
+ | - output USB 3.0 type A socket | ||
+ | - output USB type C socket | ||
+ | - data USB type micro-B socket, USB HID connection to the computer to read the measurements and flash the firmware | ||
+ | - 4 button to interact with the interface (back, ok, previous, next) | ||
+ | - PD switch to enable USB-C Power Delivery triggering | ||
+ | - [[http:// | ||
+ | - input diode protection: not in-line, but shorting GND to VBUS when GND > VBUS | ||
+ | - R012F shunt resistor (12 mOhm): to measure the current | ||
+ | - 5R10 shunt resistor (5.1 Ohm): which can be switched in line to measure low currents | ||
+ | - [[https:// | ||
+ | - [[https:// | ||
+ | - [[https:// | ||
+ | - [[https:// | ||
+ | - [[https:// | ||
+ | ===== Software ===== | ||
+ | |||
+ | ===== Support ===== | ||
+ | |||
+ | ===== Communication ===== | ||
+ | |||
+ | ==== USB HID ==== | ||
+ | |||
+ | ==== Bluetooth Serial ==== |
web-u2.txt · Last modified: 2024/01/07 17:49 by 127.0.0.1