12 votes

Best way to power multiple Raspberry Pi 4s?

The official Power Requirements of the Pi 4B is 5v, 3.0A - I.e. a total of 15W maximum power requirement from each of the Pis, so a 60W USB power supply, or larger, would be ideal. This is a maximum, ...
David Buck's user avatar
6 votes
Accepted

USB OTG Hub does not recognize devices at boot

Binding and unbinding the driver for the hub itself will cause anything connected to it to be registered and appear in lsusb. Unloading and reloading the driver module itself might also work, but for ...
goldilocks's user avatar
  • 58.9k
5 votes
Accepted

Can I use the USB Hub to power the Raspberry Pi Zero?

Yes, you can power the Pi from the hub with an extra usb to micro usb cable coming from the hub to the PWR input on the Zero. This shouldn't cause any problems whatsoever, no feedback. You really ...
Patrick Cook's user avatar
  • 6,365
5 votes

Powered USB hub for Pi Zero

The Hubpixed is not a power hub, but it draws power directly from the main board and therefore you should be good. It does not require any cable or soldering and connects seamlessly to the Pi Zero.
user2125048's user avatar
5 votes

DIY USB 3 Way Splitter on Raspberry Pi Zero

You can get a USB hub that stacks in the same footprint as your Pi and this model even alllows you to maintain access to the GPIO pins. Note these come in two models, one for the original Pi Zero ...
Steve Robillard's user avatar
5 votes

RPI4 won't boot with powered USB hub

The issue could stem from the fact that some cheap USB hubs back-power an unpowered host when those hubs are powered: essentially, the 5V circuit of the hub is directly connected to the 5V line of the ...
Dmitry Grigoryev's user avatar
5 votes
Accepted

Powered USB3 Hub vs USB3 Y Power Cable

This answer is incorrect. Depending on model & OS USB can supply 1.2A. Typical Power Requirements I doubt it would work, according to this page: USB - port power limits the Raspberry Pi USB ...
ON5MF Jurgen's user avatar
4 votes
Accepted

DIY USB 3 Way Splitter on Raspberry Pi Zero

Unfortunately not. USB hubs have active circuitry that controls the data flow (and also power requirements) of slave devices. You could strip the circuitry out of a USB hub, although I'm not sure ...
js441's user avatar
  • 321
4 votes
Accepted

USB ports stop working after a week, needs restart

Here's a method about controlling the power to ports on a USB hub, using software - the hub-ctrl.c app from a question that another post above links to. It can be used to wake up the USB ports (at a ...
Edward's user avatar
  • 162
4 votes
Accepted

Raspberry pi zero refuses to detect USB hub - tried multiple hubs

I already have an OTG hub that works fine either powered or not as described here, but note when the hub is powered, it must be used to provide power to the Pi, since otherwise there would be two ...
goldilocks's user avatar
  • 58.9k
4 votes

Is it possible to prevent the Pi from receiving power from a powered USB hub?

Theoretically it is impossible to backpower a PI3 (or other modern models). However tests by a member indicate that if the Pi is powered on, it will remain powered through the hub. This is arguably ...
Milliways's user avatar
  • 60k
4 votes
Accepted

Could the Raspberry Pi be programmed to be a smart USB Hub?

In order for the Raspberry Pi to be recognised as a USB peripheral (which a hub is) by another computer, it would have to act as an USB slave. The Raspberry Pi B can only act as a USB host, so you'd ...
FD_'s user avatar
  • 156
4 votes
Accepted

Pi with multiple HDDs from a powered hub

Will the read speed of each hdd drop the more hdds I add due to the pi usb controller? This is exactly what will happen. Connecting multiple HDDs (and the more so SSDs) to an RPi to increase disk ...
Dmitry Grigoryev's user avatar
4 votes

Iot hub and rasberry pi

It looks like you are asking for a tailored solution for your DiY project. Well I think the following links can point you to right direction as these are tutorials for interfacing RaspPi to Azure IoT ...
Sourindu Chatterjee's user avatar
3 votes

unable to enumerate USB device

The information I'm finding relating to 'error 110' suggests that you're exceeding the power limits of the USB port. I'd recommend that you: Use a meter to properly confirm the power output of your ...
goobering's user avatar
  • 10.7k
3 votes

How to make a Raspberry Pi Hub yourself?

You should be able to, although as per my comments it probably is not necessary; all you need is a commonplace OTG adapter. Based on the wikipedia description, however, you could make one yourself ...
goldilocks's user avatar
  • 58.9k
3 votes

How to make a Raspberry Pi Hub yourself?

Note that the very same hub you have bought exists in OTG variant as well: This one should work with RPi Zero just fine. Check out the shop you got your hub from: perhaps they have the OTG model as ...
Dmitry Grigoryev's user avatar
3 votes
Accepted

Multiple Raspberry Pi Zero to ethernet

Sorry, that wont work. Only the 'master' Pi0, plugged in to the 'uplink' port using a OTG cable can use the gadgets, among which all the other Pi0's and the builtin Ethernet adapter. You could ...
josn's user avatar
  • 46
3 votes

Is it possible to prevent the Pi from receiving power from a powered USB hub?

Thanks to gadgetoid and niko over on the Pimoroni forums it seems the fix was twofold: Cut the 5v+ wire on the USB cable (assuming you're powering it separately than the Pi) Add a 1k resistor between ...
Adam Plocher's user avatar
3 votes

RPI4 won't boot with powered USB hub

Had the same powered usb hub issues with my pi4. If connected to pi + hdd+ power ----pi hangs. If connected to pi + no HDD + power --- pi hangs / does not boot. Note in the above cases pi was headless....
user119238's user avatar
3 votes

How many HDDs can be connected to a raspberry pi zero 2w (by using usb hubs)?

The maximum number of USB devices on a bus is 127. From that number, you must substract the root-hub and all the other hubs that you need. Note that some hubs use more than one USB devices. Also, some ...
Ljm Dullaart's user avatar
  • 2,491
3 votes

I broke SSH access to my Raspberry Pi

As pointed out by Jaromanda X, the ethernet NIC on the Pi 3 (and earlier models) is integrated with the USB controller. There is a bit of a clue in the first line of that uhubctl output ("5 ports&...
goldilocks's user avatar
  • 58.9k
2 votes

How to Boot from one usb drive but have multiple drives connected to hub

@conrad_heimbold is right, and editing /boot/cmdline.txt with the PARTUUID will actually boot your Pi. However, he is wrong in one place. If you place quotemarks around the PARTUUID, your Pi will ...
JustinSB's user avatar
2 votes

How to Boot from one usb drive but have multiple drives connected to hub

The default pi kernel can not handle UUIDs, only PARTUUIDs. To be more detailed: UUIDS depend on the file system of the partition PARTUUIDS do NOT depend on the file system of the partition This ...
conrad_heimbold's user avatar
2 votes

USB ports stop working after a week, needs restart

have similar problems with our set up. Some times the usb port stops without any reason. This is with our WIFI adapter. Just pressing enter on an attached keyboard or resetting the wifi adapter makes ...
Maarten's user avatar
  • 21
2 votes

USB Hub to power 8 Pis

I don't think that the device you linked to will do what you want. It's power supply is 5V 2A, which is not going to last very long trying to power 8x Raspberry Pi B's or B+s. According to this ...
YetAnotherRandomUser's user avatar
2 votes

USB Hub to power 8 Pis

A USB hub will likely not be enough to power 8 Pi's. The spec is for 500mA per port (USB 2) and 900mA (USB 3). I don't know of any hub that could supply 8 Amps (1 amp per port). All of the Pi cluster ...
Steve Robillard's user avatar
2 votes

Cheap USB hub with Pi Zero?

The cheap solution is to get a USB OTG adapter. You can find them in multiples on eBay and Amazon, and I have found them cheap at Microcenter. As an alternative, to continue to modify the hub, you'...
YetAnotherRandomUser's user avatar
2 votes

Multiple questions about power and USB hubs

The original A/B models have some problems with the USB ports and power. For starters, they won't deliver much more than 150 mA each, and the USB 2.0 standard is 500 mA. This means certain things ...
goldilocks's user avatar
  • 58.9k
2 votes

Do I have to buy a powered USB hub?

If a power supply is 2A and the only device connected to USB port will be 2.5' HD that uses 1A, it should be just fine, as 1A is totally enough to run raspberry. Even 1/3 of that would be probably ...
Flash Thunder's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible