Using the raspberry Pi 2 mod B to programming arduino with a usb externally powered hub

Also, could you take a pic of the setup? Powered hubs have a 'host' port usually on one end, then a series of 'client' ports. The RPi should be connected via one of the four usb ports, not the power connector, to the host port, and the arduino should be connected to one of the client ports.

Mike

Edward Yee wrote:

 

BTW in the original Post that started this Discussion Thread: Q1: where "... i am in dialout group..." was quoted. What is the significance of this? Q2: where "...latest usb drivers usbutils..." was quoted. What is the significance of this?

 

When the device is enumerated (the /dev/tty* device) it's default permissions are rw-rw----, owned by root and the dialout group, so he was just indicating that he had permission to see the device

He was also indicating that he had the latest drivers and utilities to access the usb device.

Both of those statements prevented the questions:

Do you have permission to access the device?

Do you have the latest drivers utilities?

I think he was just trying to head off unnecessary questions.

Mike

AS in his original post wrote:"... 2 HID's 1 USB hub (connected)..." What does "HID's"=?

MC wrote>...

I just connected an Arduino to my pi, directly to one of the usb ports and it showed up as...

ELY Reply>>Is your Arduino Variant an Actual Arduino Uno OR one of the Licensed Variants? AAR doing a Wiki on "Arduino Uno" show a pic of the device, and I see a Full-Size Female USB-B Connector on the Arduino Uno Board. Like I said in earlier posts to this Thread. WRT USB: A-should go to-B. (when NOT using a USB Hub)

Thx MC for your explanation of AS's remarks.

As for my set-up: I have an old RaspPi w/26pin GPIO Header (I think it is a Mod 1 B, circa 2013), awaiting shipment of a Gertduino board, and have a student version of Matlab/Simulink. Matlab says that they only support RaspPI Mod B, but we shall see. AAR $35 is not too much to pay for compatibility.

USCDADNYC (NY NY USA)

A HID is a Human Interface Device, like a keyboard and mouse

Mike

i have already tried lsusb and no the Arduino serial chip is not found by the way its uno r3

this is the usb hub i have i connect my rpi with that weird looking usb port you can see at the back. Hub is quantumzero qz-hb05 , its 1x4 usb 3.0

Very nice build quality. The only issue that I found is, without using the power cable plugged in, the hub does not work.

• VIA VL812 Rev B2 chipset with latest firmware for best performance and widest compatibility.
• QuantumZERO USB 3.0 4-Port 12V 2.5A Powered Hub, 12V 2.5A Power Adapter, USB 3.0 Data Cable
  

Because this is a USB 3.0, it may not be fully usb 2.0 backward compatible for Arduino. Please try directly on the USB plug into RPi 2. That should work.

Clem

AS wrote>>...this is the usb hub i have i connect my rpi with that weird looking usb port you can see at the back...

ELY Reply>> This is a Female USB3.0 full-size B connector. Remember RaspPi's USB-A -goes-to-Hub's-B. I assume you have such a Cable. Whether it is USB3.0 OR USB2.0 Cable. I also assume that this USB3.0 Hub IS BACKWARD w/ USB2.0. WRT to USB plug/jack/cables: Do a "Wiki' on USB. There are Two Tables (of particular Interest) and that is the mating of Female Receptacles (Jacks?) and their Corresponding Male Receptacles (Plugs?). Although your USB3.0 Hub may SAY it is backwards compatible, maybe you should use ALL USB3.0 Cabling, EVEN though your devices (RaspPi , Arduino Uno R3) are USB2.0

BTW AS wrote>>...

i have already tried lsusb and no the Arduino serial chip is not found by the way its uno r3...

ELY Question>> what is "Isusb"?

I will look at the Arduino Uno R3 specs, and will comment later on this thread.

As Clem (and others) Asked, could we get a wiring diagram between the RaspPi, Arduino Uno R3 and this Quantum Zero USB3.0 Hub?

blog again later

USCDADNYC (NY NY USA)

I am Back. I took a look at the Arduino Uno R3, and it is what I am vaguely familiar with. AAR I would say that w/o using the powered Hub, connect any RaspPi Full Size USB 2.0 Female -A receptacle -TO- Arduino's Full Size USB 2.0 Female -B. Alternately using the USB 3.0 Hub, AND Using USB3.0 Cables (for any connections, this to take cabling out of the Equation) Of course this doe NOT  address the possibly non-Backward Compatibility of this particular USB3.0 Hub. AAR (again using ALL USB3.0 Cables) 1. connect RaspPi any Full Size USB 2.0 Female -A receptacle-TO- Hub's Full Size USB3.0 Female -B Receptacle. 2. Connect (on the Hub) any Full Size USB3.0 Female -A receptacle-TO-the Arduino Full Size USB2.0 Female -B Receptacle. I would connect your HID's (Keyboard, Mouse) onto the other USB2.0 ports on the RaspPi.

As to what S/W one would use? Your Guys/Gals', Guess is Better than mine. I have and (hope) to use a combo of: 1) Win10 PC (running Matlab/Simulink) connected to a RaspPI via Ethernet (either direct? [Cross-Over RJ45 maybe needed here]or a USB3.0 Hub). 2. The RaspPi will be connected to my Gertduino (Arduino variant) via the 26pin Header (GPIO pins). 3. Hopefully there is/are S/W in MatLab/Simulink to accomodate this Set-up.

USCDADNYC (NY NY USA)

Yes connecting directly to rpi works but the main problem why i bought the externally powered hub was because of current drops in rpi when arduino is connected

for eg.

>if i have a arduino with a load(like a servo) connected to raspberry pi's usb there are current drops in rpi and rpi freezes

>but if i have a small load connected to arduino(like a LED) everything worked fine

Hence i thought this could be a Amp problem so.. i bought a externally powered hub.