#please connect your ODrive

[Husam]

Hi !
I’m new to this.I’m using odrive v3.6-56V
I was working on the odrive using ubuntu 20.04 connected via USB, and used odrivetools to perform some commands that were listed on the getting started page. and also connected the odrive using ros2 and everything was perfect, now suddenly when I try to connect the odrive using odrivetool or ros2 I got ''please connect your odrive and it seems the USB is no longer detectable.
I tried out different cables and used different pc and jetson nano kit, still the same things.
I change it to dfu mode (moved the switch from run to dfu) and still not detectable.
Does anyone know how to solve this issue?

[rosendhr]

I have similar problem and searching for solution too

[towen]

It could be a permissions issue. Have you run sudo odrivetool udev-setup ?
Check that ODrive shows up when you do sudo dmesg -w

[rosendhr]

I have tried your solution @towen but still get

[ 3890.192217] usb usb1-port2: attempt power cycle
[ 3890.844522] usb 1-2: new low-speed USB device number 29 using xhci_hcd
[ 3890.844925] usb 1-2: Device not responding to setup address.
[ 3891.052692] usb 1-2: Device not responding to setup address.
[ 3891.260148] usb 1-2: device not accepting address 29, error -71
[ 3891.388547] usb 1-2: new low-speed USB device number 30 using xhci_hcd
[ 3891.389116] usb 1-2: Device not responding to setup address.
[ 3891.596750] usb 1-2: Device not responding to setup address.
[ 3891.804362] usb 1-2: device not accepting address 30, error -71
[ 3891.804463] usb usb1-port2: unable to enumerate USB device

[towen]

That looks like a hardware issue.
Either you have a dodgy USB cable, or you have some current flowing back to GND via the USB.

Is there a path back to GND through the controller? (do they share a ground?) If so, you may need an isolator.

Also, when you tried DFU mode, did you flip the switch while power was off? (or power cycle it afterwards) - the switch setting is only applied at power on.
See what dmesg says in DFU mode.

[rosendhr]

I’m using the recommended USB isolator. I had no problems before , and i have established connection before in this setup. I have posted a thread, where i have described my problem: here

USB Connection issues - Odrive v3.6 56V

Hi, I’m having problems with my odrive USB connection. I wasn’t using my odrive for 2 months. Today I decided to turn it on and test if its still working. At first I was able to detect it with the odrivetool, then it suddenly disconected during a simple full calibration sequence that i called from the odrivetool, just to test if everything is ok. I saw that there are a lot of similar threads, but all of the things there didnt help me. My power light is on , the board gives both 3.3 V and 5V ou…

I have tried switching to DFU mode, but there is no change in the responce. I have switched when power was off. So you say i have to switch to DFU when power is on and then power cycle it ?

[towen]

Interesting. Can you try without the isolator? (so long as there is no power flowing and the grounds are at the same potential it will be fine) It’s possible that the isolator has gone bad somehow.

You can switch the DFU switch at any point, but it will only take effect when you first apply power.