problems with usb hub

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?

bhouston's picture

USB Hub possible solution

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.

JCInMoov's picture

alrighty will try

alrighty will try that 

thanks for the tip!

GroG's picture

LACK OF POWER IS THE ROOT OF

LACK OF POWER IS THE ROOT OF ALL EVIL !

good luck JCInMoov ;)

JCInMoov's picture

Still doesnt work.... tried

Still doesnt work....

tried it with the power supply..

maybe its something wrong with the usb hub itself?

GroG's picture

I use a IOGear USB hub on

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?