I am trying to solder a wifi adapter right on to my raspberry pi zero so it takes up less space.

I've followed this video and some other diagrams on how to wire usb devices right on to the pi zero. Unfortunately, when i solder the adapter on the pi like this: wifi adapter connected to my pi zero then the pi doesn't detect it. It just runs normally like without it.

Some additional information:

  1. I know that the wifi adapter works and is compatible with linux (i tried it before attempting this).
  2. The adapter works fine when it's connected via a usb header so it isn't broken.
  3. The usb plug on my pi works normally.
  • Can you verify that the electrical connections are good with a multi-meter? Do any lights turn on on the WiFi adapter when it is connected like this or can you measure any voltage? Can you verify D+/D- aren't short-circuiting? Have you doubled checked that they are soldered on the right way around and haven't been reversed? – Fred Nov 2 '19 at 9:20
  • Sorry for the late reply @Fred , i lost all hope because nobody could help me. The connections are good. The wifi adapter has a LED that blinks when its working, but it isn't when i try to connect it like this. D+/D- aren't short-circuiting and i am sure that they are soldered on the right way around. Maybe it has something to do with the fifth pin on the micro usb? It does work when i connect it with an otg usb a to micro usb adapter though. – bain Nov 3 '19 at 22:05
  • Forgot to say that my multi-meter reads 3V (2,75V?) on D+/D- and normal 5V on the 5V/GND. – bain Nov 3 '19 at 22:13
  • Can you use the OTG adaptor to check continuity through to the ends of the soldered wires? The 5th pin on the Micro USB header isn't used on a regular Type A connector and shouldn't matter. If the wiring is fine, the only other thing I could think of would be a voltage drop on 5V during power on or possibly the wire gauge is too small. – Fred Nov 5 '19 at 8:59

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