Differences

This shows you the differences between two versions of the page.

--- web-u2 [2019/09/02 21:41] – created kingkevin
+++ web-u2 [2019/09/09 09:00] – fix overview kingkevin
@@ Line 1: / Line 1: @@
 The U2 is a USB power meter and tester.
-It is full of features and makes it the most complete I known of:
+It is full of features and makes it the most complete USB power meter I known of:
   * 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)
-  * large clear LCD screen
+  * large (1.77 in / 4.5 cm) clear (can use large fonts) LCD screen (160*128 pixels)
-  * can detect charger compliance/profile: Apple 2.4A, QC 2.0, QC 3.0, QC 4.0, BC, PD 2.0, PD 3.0, MTK, Huawei, ...
+  * can detect charger compliance/profile: Apple (5V @ 2.4A, PD), Samsung (5V @ 2.0A, AFC), USB Battery Charging (BC1.2 DCP), Qualcomm Quick Charge (QC 2.0, QC 3.0), USB Power Delivery (PD 2.0, PD 3.0, E-Marker), Huawei (FCP, SCP), MTK (PE1.1, PE2.0), OPPO (VOOC, DASH, Super, FLASH)
-  * external power input: to not affect the current measurement, the device can be powered using the micro-USB HID power. This also allows to measure voltages under 4 V (the minimum required if you power using the normal USB port
+  * external power input: to not affect the current measurement, the device can be powered using the micro-USB HID power. This also allows to measure voltages under 4 V (the minimum required if you power using the normal USB port)
   * computer interface to read the measured values: USB HIB (micro-USB port which also can externally power the device), and Bluetooth (U2p version)
+===== Hardware =====
+There are several slightly different versions of the hardware, with confusing names.
+I will us the names I can read on the device itself to identify them.
+==== WEB-U2 ====
+This is the first device I bought from the [[https://www.aliexpress.com/store/2022043|HiDANCE store]], and seems to be a [[https://usbchargingblog.wordpress.com/2019/03/09/alert-fake-u2-upms-have-quietly-entered-the-market/|clone]].
+The original manufacturer blocked this device.
+After flashing firmware version 5.5, the display would just show ''104083 ERR'', and the device would not work anymore.
+Moreover it was not possible to re-flash it anymore.
+Thus **don't install firmware version 5.5 of later if you have a device with serial 104083**, else you will brick it.
+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.
+===== Software =====
+===== Support =====
+===== Communication =====
+==== USB HID ====
+==== Bluetooth Serial ====