Using USB IOT to conect to another device

mangOH Red
#1

Hello all,

I made a small modification to one of my Red’s. I modified the Raspberry connector, routing the D+/D- signals of the USB_IOT. I need to connect to another microcontroller.

Could anyone provide me a hint about how to activate that connection? I have already tested, but seems that when connecting that USB port to a USB on a linux machine, nothing happens.

I’m unsure if I have to also connect the V_IOT signal, or just leave the VBUS pin unconnected.
Moreover, do I need to further configure the HSIC hub?

Thanks a lot.
Stay safe.
Enric

#2

Did you remove the R366 and R365 and add R367 and R368 in the Raspberry connector?

BTW, suggest you using the pin2 and pin 3 of IOT connector CN306 directly.

#3

Yes, that exactly what we did.
It is more convenient for us to use the Raspberry connector.

The question is whether we should do any kernel modification, or if we connect a USB device, it should get indexed right away?
Right now we are not getting any result (we are double-checking from the electrical point of view).

Regards

#4

Actually you should try the USB host connector first.
This connector should be working with USB thumb drive.

#5

Ok, will start with this and see what happens.

#6

Hello,
Back from a few days of vacations I tested a number of things.

First, I checked a USB pen and it worked.

Then, I checked the modification we implemented on the USB_IOT connection. I’m trying to connect that USB port directly to a PC. For this connection I’m using a modified USB cable with its end modified to connect to the raspberry connector. No results seen from the dmesg command.

From there I tried you suggestion to use the IOT connector. I soldered a USB cable to the IOT breakout board and tested and retested the continuity of the connections.

No response so far.

What I’m doing wrong?? Any idea?

Thanks

#7

How about USB host connector to raspberry pi?

#8

Can I connect two usb hosts? One on the mangoh red and the other on the rasp?
The rasp4 has 4 usb, two USB2 host and two USB3 host.

#9

You might try with usb hub