problems with usb hub

Submitted by JCInMoov on Thu, 04/03/2014 - 06:57

Hey all,

first off, im completely done with my inmoov project! (coding-wise)

everything works, but i came across a lil blip while trying to fire him up:

im using a laptop that has only three usb ports, so i needed more for the arduinos and webcams, so i used a usb hub.

the problem is, when i use the usb hub, i get a sendMsg Input/Output Error in writeByte

I know its a problem with the usb hub because when i plug the arduinos directly, it works fine.

has this happened to anyone else? Can somebody try it with a differnt usb hub to see if its a brand specific problem or something?

‹ UNRESOLVED DEPENDENCIES errors when installing services openCV not working with Mac iSight camera ›
bhouston's picture

USB Hub possible solution

Submitted by bhouston on Fri, 04/04/2014 - 18:12.

I had this same problem. If I plugged in more than the 2 arduino's and the camera in the eye, I would get the same message. My USB Hub came with a power supply, If I use that everything runs OK.

Maybe try that.

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JCInMoov's picture

alrighty will try

Submitted by JCInMoov on Fri, 04/04/2014 - 19:48.

alrighty will try that 

thanks for the tip!

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GroG's picture

LACK OF POWER IS THE ROOT OF

Submitted by GroG on Sat, 04/05/2014 - 07:13.

LACK OF POWER IS THE ROOT OF ALL EVIL !

good luck JCInMoov ;)

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JCInMoov's picture

Still doesnt work.... tried

Submitted by JCInMoov on Mon, 04/14/2014 - 07:31.

Still doesnt work....

tried it with the power supply..

maybe its something wrong with the usb hub itself?

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GroG's picture

I use a IOGear USB hub on

Submitted by GroG on Mon, 04/14/2014 - 07:50.

I use a IOGear USB hub on more than one Arduino and it works ok.  It still sounds like a power issue. Does the hub work with 1 Arduino?  I assume you are powering the Arduinos from the USB hub, can you power them with the barrel jack on a wall wart?

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