Differences

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--- web-u2 [2019/09/02 21:41] – created kingkevin
+++ web-u2 [2019/09/08 22:15] – add web-u2 hardware 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)
@@ Line 9: / Line 9: @@
   * 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 ====