verify if a USB 2.0 cable with micro-B plug can be used to transfer data, or just for chargingDesigned by CuVoodoo in Germany
The micro-USB cable tester verifies if a USB 2.0 cable with micro-B plug can be used to transfer data, or just for charging. Purpose Have you ever plugged in a device using a micro-USB cable and wond…Read More…
The micro-USB cable tester verifies if a USB 2.0 cable with micro-B plug can be used to transfer data, or just for charging.
Have you ever plugged in a device using a micro-USB cable and wondered why you can't see it on your computer? Especially when you are developing the USB stack of a micro-controller. This tiny gadget will test the cable and confirm if it can be used to transfer data. Now you can be sure your USB implementation needs some tweaking, and not waste time because this cable was only for charging.
Ensure a CR1220 coin cell is present in the holder on the back of the board. A CR1220 coin cell is provided with the tester.
Plug in the USB type A of the cable at the top, and the USB type micro-B at the bottom:
Normally USB cables capable of data transfer should always be used (USB specification compliant cables), and the charger port the cable is plugged into indicates the device can draw up to 1.5 A by shorting the data lines (D+ and D-). This is known as a Dedicated Charging Port (DCP). Because most USB ports capable of providing more than 500 mA are common practice now, some penny pincher though it was a good idea to short the data lines directly in the micro-B plug, and save the cost of the two additional wires for data transfer (along with shielding and controlled impedance). Such cables are often provided to charge battery operated devices.
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James | April 22, 2022
Elöd | March 16, 2022
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