We recently received a Raspberry Pi at the Plugable offices and we have been using it to test how our various devices interact with it. The Raspberry Pi has 2 USB 2.0 Ports, and no USB 3.0 ports, so our testing was focused on USB 2.0 devices and a couple USB 3.0 storage devices.
All of these tests were carried out on a Raspberry Pi Model B using the latest version of Raspbian wheezy. Here’s a video of the full setup, followed by a bunch of detail about our tests:
- Plugable USB 2.0 7 Port Hub with 3A Power Adapter – No Issues
- Plugable USB 2.0 4 Port Hub with 2.5A Power Adapter – No issues
- Plugable USB 2.0 10 Port Hub with 2.5A Power Adapter – Causes the Raspberry Pi to reboot upon connection, because it supplements the 2.5A wall power with 500mA from the upstream port. This is too much for the Pi., but just at the moment it is plugged in. If you plug the 10 port hub in when the Pi is powered down, you can boot into the Pi and all will be well. But since there are better options (like the 7 port hub above), we don’t recommend our 10 port hub with the Pi.
- USB2-2PORT – Causes the Raspberry Pi to reboot upon connection. This is simply because this is an unpowered hub. Only hubs with their own power adapter should be used with the Pi.
- USB3-HUB7-81x – USB HID devices(Mice, Keyboards) are known not to work with this hub on the Raspberry Pi.
- USB3-HUB81x4 - USB HID devices(Mice, Keyboards) are known not to work with this hub on the Raspberry Pi.
- USB2-SWITCH2 – No issues
The common pattern with all devices is you must have one of the powered usb hubs above and connect the device through that. If you don’t, the Pi won’t be able to handle the power draw, and it will drop voltage and reset.
- Plugable USB 2.0 Gigabit Ethernet Adapter – Driver already in kernel. Works automatically when connected through a powered USB Hub.
- Plugable USB 2.0 Fast Ethernet Adapter – Driver already in kernel. Works automatically when connected through a powered USB Hub.
- Plugable USB 3.0 / 2.0 SATA Dock – Driver already in kernel. Because it has its own 12V 2A AC adapter, it works automatically even when directly connected to the Pi.
- Plugable USB 2.0 SD / MicroSD / Memory Card Reader- Driver already in kernel. Works automatically when connected through a powered USB Hub.
- On a Raspberry Pi running Raspbian we have test our Microscope connected through a powered USB hub to work with GTK+ UVC Viewer by using the following terminal commands:
“sudo apt-get install guvcview”
Let us know if there are any other Plugable products you’d like us to test, or if you have any questions at all – we’d be happy to help. Thanks for your support of Plugable products!
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