5v Pins (GPIO's) didnt work!

Hello Community, I have a Problem so please help me :wink:

Yesterday I tried to connect my 8 channel Relay-Module with the GPIO’s/Pins on my Banana Pi M3 but the Relay didnt work, so I check the GPIO’s/Pins with my multimeter to find out the reason. Finally I found out that the 5V Pins didnt work (Pin 2 and 4, marked on the picture). The multimeter shows me 0v.

Can you say me the reason ? I use the USB-OTG plug as energy source and NOT the DC Power plug - maybe thats the Problem.

Does the 5v Pins only work the the DC-Power Supply or what ? - If so please send me a buy link for a working DC Power Supply.


1: http://www.pic-upload.de/view-30504282/m3-gpio.jpg.html 2: http://www.pic-upload.de/view-30504311/BPI-M3-Front.png.html

Sorry for my bad english (I’m from Germany) :smiley:

Thank You

Greetings root_Padi

If you connect via dc power its work fine. I never try to power banana via otg - thats possible, it can’t working 5v on gpio.

Buy any 5v 2A power supply with connector 4.4 x 1.6 mm

Sorry for my english - I’m from Poland :smiley:


Hello again :smiley: Yes thats true I tested the Connection from the DC to the Pins and my multimeter say me that there is a connection so the OTG Power Supply is the Problem…

another problem is that I cant find a 5v 2A power supply with connector 4.4 x 1.6 mm in a german Store maybe someone can send me a buy link for that. (Amazon would be nice)

dziękuję bardzo :smiley: Thanks