External Power Problem

[wpfundstein]

Hi,

1. if i use a powersupply with micro usb on the wifi-dipcortex it does not work. it powered up only if i connect the USB cable to my pc.

2. if i use external power on pin 32 (+5V) und pin 31 (GND) the module also does not powered on. if i connect external power on this pins i have 3.3 V on pin p11. so i think the regulator works.

any ideas?

[Carl-SolderSplash]

Hi,

If you can measure 3.3v on the 3.3v pin when you apply 5v the regulator is working and so should the processor.

I would eliminate the software, use a simply blinky application to just flash the led to show the micro is running.

The USB vbus is the 5v net so there should be no electrical difference

[wpfundstein]

Grazy. After removing the lib USBDevice it works.