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UUGear news

New Variety: 32GB RasPiKey eMMC Module for Raspberry Pi

Since we released RasPiKey, we received a lot of inquires about variety with bigger storage capacity. Now the 32GB RasPiKey is finally here!

What’s New?

Not much really, only the storage capacity is doubled comparing to the 16GB variety. The 32GB variety has the same read/write performance, because it uses the eMMC chip from the same family (16GB RasPiKey uses Samsung KLMAG1JETD-B041 while 32GB RasPiKey uses KLMBG2JETD-B041).
Besides checking the marks on the chip, you can also tell which one is 32GB from its packaging. The 32GB RasPiKey comes with a blue lanyard (16GB has black one) and it has “32GB” printed on the label on its antistatic bag.

Bootloader and OS Version

Raspberry Pi 3B+ or earlier models of Raspberry Pi all supports RasPiKey directly.
Newly produced Raspberry Pi 4B has rather new bootloader, which can directly recognise RasPiKey. However if your Raspberry Pi 4B is from older batch, you may need to upgrade bootloader. Both 16GB and 32GB RasPiKey has necessary files to upgrade bootloader for your Raspberry Pi 4B.
Since today (2020.1.7), all our RasPiKey have files that allow you to upgrade boot loader to version “c305221a6d7e532693cc7ff57fddfc8649def167” (released on 3rd September 2020).
Since today (2020.1.7), all our RasPiKey have flashed Raspbian (Raspberry Pi OS) disk image released on 2nd December 2020.
You can of course install different version of OS into RasPiKey, just like you did on a normal SD card. Please don’t forget to backup those handy applications for WiFi and SSH settings, if you want to use them after installing new OS.

Price and Where to Buy?

32GB RasPiKey’s retail price is 720 CZK (about 27.54EUR / 24.96GBP / 33.98USD ).
You can order it from our e-shop or you may be able to order it from our resellers soon.


Updated on 2022.06.20:

Since today (2022.06.20), all our RasPiKey have flashed Raspbian (Raspberry Pi OS) disk image released on 4th April 2022 (2022-04-04-raspios-bullseye-armhf.img).

UUGear Web Interface (UWI): Access Your Devices via Browser

We previously developed a QT based GUI for Witty Pi 2. It works, but the feedbacks from our customers were not that good: that GUI is quite slow and it is not responsive when running on Raspberry Pi Zero (W). For this reason, we deprecated this GUI when Witty Pi 3 was released and we continued looking for a better way to provide visual and interactive interface for UUGear devices.
Now we have it! The UUGear Web Interface (UWI) is a very lightweight web server that allows you to access your Raspberry Pi and UUGear devices in web browser. It only uses very limited system resource (about 2~6% CPU usage) and even Raspberry Pi Zero (W) can run it very well.
You don’t actually need a UUGear hardware to use UWI. After installing UWI and visit http://raspberrypi:8000, you can find this “Raspberry Pi (GPIO)” device listed, and you can use it to control the GPIO pins on your Raspberry Pi.

If you are Witty Pi 3 (Mini) or Zero2Go Omini user, you can use UWI to access your devices too. Anything that you can previously do via the interactive BASH script, now you can do it with UUGear Web Interface.

How to install

You can install UWI with this single command line:

curl | sudo bash

Alternatively, you can download the install script and run it.

sudo sh

If you install software for Witty Pi 3 (Mini) or Zero2Go Omini, their install script will also install UWI for you.
After installation, you will need to reboot your Raspberry Pi (so the UWI server will run automatically), and then you can access your devices via http://raspberrypi:8000/
You can access your devices from your PC, tablet, smartphone etc..
UUGear Web Interface
The source code of UWI is also available on GitHub:

Witty Pi 3 Mini: the New Witty Pi Mini is Here!

Witty Pi 3 Mini is the “Mini” version of Witty Pi 3, and it is also the direct descendant of Witty Pi Mini. Witty Pi 3 Mini has almost the same design with Witty Pi 3, but it is smaller (pHAT shape) and it doesn’t populate the LDO voltage regulator (LM29150).  Users who want to directly connect Witty Pi 3 Mini to higher voltage can solder the LDO on the back of board, or connect an external DC/DC converter to it.

Like the old version of Witty Pi Mini, Witty Pi 3 Mini uses a 0.08F super capacitor for off-power time keeping, and the RTC (DS3231) will remember the time for about 17 hours without external power supply connected.
Witty Pi 3 Mini can be mounted on Raspberry Pi Zero (W) and still keep the whole device small and thin.

Witty Pi 3 Mini can also be mounted on full-sized Raspberry Pi, with the help of stacking header (not included in the package).

Price and Where to Buy?

Witty Pi 3 Mini’s retail price is 400 CZK (about 15.89EUR / 13.60GBP / 17.68USD).
You can order it from our e-shop or you may be able to order it from our resellers soon.

New Product MOSWITCH-SPDT and Black Friday 20% Off

Ladies and gentlemen, today we have two good news to announce :0)


MOSWITCH-SPDT is a single pole double throw (SPDT) switch implemented with MOSFETs, and it has very small footprint (2cm x 2cm).

It works like a relay, but it is quiet, has higher switching speed and longer life cycle.

The control signal and the main power rails is isolated by an optical coupler on the board. It is very easy and safe to use low voltage signal (e.g. 3.3V or 5V) to control higher voltage (up to 28V) and higher current (up to 9A for resistive load) circuit.

Retail price is 120 CZK (about 4.70 EUR / 4.05GBP / 5.20USD). Now you can find it in our e-shop.
Like other products in our e-shop, you can get 20% discount during the Black Friday event (from 29th November to 3rd December).

Black Friday 5 Days Event

From 2019.11.29 0:00 CET to 2019.12.03 23:59 CET, you can use coupon code blackfriday2019 to apply 20% discount to your cart. Enjoy shopping!

This coupon could be used by normal customer accounts (including newly registered account). However reseller account could not use it.

New Product: RasPiKey eMMC Module for Raspberry Pi

Our new product RasPiKey is released today!

RasPiKey is a 16GB eMMC module designed for Raspberry Pi. It can be inserted into the micro SD card slot on Raspberry Pi and work as a faster (especially 4k read/write) and more endurable SD card.

On Raspberry Pi 3B+, RasPiKey shows much better performance than SD cards (using the benchmark introduced in Jeff Geerling’s blog):

Benchmarks on Raspberry Pi 3B+

Benchmarks on Raspberry Pi 3B+

RasPiKey can also be used on Raspberry Pi 4B, however you will need to update your Pi4’s bootloader first. At the time being, RasPiKey gets limited support by Raspberry Pi 4B and doesn’t get speed boost like those good SD cards, its performance on 4B is not that outstanding, however it still has better 4k read/write speed than SD cards.
Updated on 2020.12: Now with the latest official firmware, Raspberry Pi 4B supports DDR52 timing mode, which boosts the performance of RasPiKey, and make RasPiKey faster than SD cards on Raspberry Pi 4B.

Plug and Play

RasPiKey has Raspbian preinstalled, and also provides some tools to make setting Wi-Fi connection and enabling SSH login much easier. It is possible that you insert RasPiKey into your new Raspberry Pi, power it on and then use it via SSH session on your computer. You can enjoy your Raspberry Pi without having another set of display, keyboard and mouse.

Price and Where to Buy?

RasPiKey’s retail price is 520 CZK (about 20.37EUR / 17.53GBP / 22.55USD).
You can order it from our e-shop or you may be able to order it from our resellers soon.

We Now Have Witty Pi 3!

Today we proudly announce our new product: Witty Pi 3, which is the direct descendant of Witty Pi 2, and has more exciting features.

Also, Witty Pi 3 supports the newly released Raspberry Pi 4!


What’s New?

Witty Pi 3 finally has its own brain: a micro controller (ATtiny841). Thanks to this micro controller, Witty Pi 3 behave much smarter and can detect and process much more complex situation. The firmware for ATtiny84 is developed with Arduino IDE, and is open-source (will be available on GitHub soon). If you don’t mind losing warranty, it is possible to modify Witty Pi 3’s firmware and change its behavior as you wish.

Witty Pi 3 also added an LDO voltage regulator (LM29150) on board, which allows you to power Witty Pi with higher voltage. Now you can directly use 6V or 7.4V battery to power Witty Pi 3 + Raspberry Pi. The 5V micro USB connector is still there, and you can power Witty Pi 3 directly with 5v too.

Besides all those that can be done with Witty Pi 2,  Witty Pi 3 also monitor the input voltage and output current. You can tell Witty Pi 3 to gracefully shutdown your Raspberry Pi when input voltage is lower than certain value; you can also let Witty Pi 3 to wake up your Raspberry Pi when input voltage increase to certain value. All these setting can be done via I2C interface, and Witty Pi 3’s software already takes care of the hard work. You can make a lot of configurations via the software. The software installation is as simple as before, just run two commands:

sudo sh

Price and Where to Buy?

Witty Pi 3’s retail price is 530 CZK (about 20.82EUR  /  18.66GBP  /  23.57USD).
You can buy it directly from our e-shop or you may be able to buy it from our resellers soon.

Can I still get Witty Pi 2?

Yes, but it will be less convenient. Witty Pi 2 is now officially retired and will only be produced on request. We suggest all new customers to choose Witty Pi 3, which has more features and can do anything that Witty Pi 2 can do. I your product is using Witty Pi 2 already, and you don’t want to switch to Witty Pi 3, you can request us to produce some Witty Pi 2 boards for your project.

New Product: Ace4U is a cable-free USB hub for Raspberry Pi A+/3A+

Good day dear friends, today we announce our new product: Ace4U!

What is Ace4U?

We already have BIG7 USB hub for Raspberry Pi 2B, 3B and 3B+, and have Zero4U USB hub for Raspberry Pi Zero and Zero W, now we finally have a USB hub for Raspberry Pi A+ and 3A+: Ace4U!
Ace4U is a cable-free, 4-port USB hub for Raspberry Pi A+/3A+. It uses 4 pogo pins to make connection between the USB hub and Raspberry Pi, so no soldering will be required.

Ace4U can be attached under Raspberry Pi A+/3A+, and give you a compact piece of hardware:

You can also place it into an Acrylic case:

Want to Know More?

You can find more details about Zero2Go Omini in its user manual:

Where to Buy?

You can order it now from our online shop. Our resellers may also resell this product.

New Product! Zero2Go Omini is Here!

Today we proudly announce our new product: Zero2Go Omini!

What is Zero2Go Omini?

Zero2Go Omini is the second member in the Zero2Go family. Just like the first generation of Zero2Go, Zero2Go Omini is a Raspberry Pi Zero sized (or pHAT shape)  and it can work as wide input range power supply for Raspberry Pi.
Zero2Go Omini supports all Raspberry Pi models that has the 40-pin GPIO header, including A+, B+, 2B, 3B, 3B+, Zero and Zero W.

What’s New?

Zero2Go Omini inherits the main features from its ancestor, and introduces a lot of exciting new features:

Multiple Input Channels

The first generation of Zero2Go has only one input channel and all input connectors are linked in parallel, which disallows you to connect multiple power supplies to Zero2Go at the same time. The new Zero2Go Omini has 3 separated input channels (A, B and C), so you can connect up to 3 different power supplies to it. All input channels can accept 3.5~28V DC, and Zero2Go Omini will automatically use the one with highest voltage.

Auto Step-Up / Step-Down

The first generation of Zero2Go only supports “pass-through” and “step-down”. The new Zero2Go Omini  supports “step-up” and “step-down” and it will switch between these two modes automatically. When input voltage is below 5.5V, the step-up engine will be used; otherwise the step-down engine will be used. You can tell which mode is currently used by checking the LED on Zero2Go Omini: blue means step-up/pass-though, green means step-down.

Monitor Input Voltages

After running the software for Zero2Go Omini, you can read the voltage value on each input channel.
The voltage values can be accessed via I2C interface, so you can also write your own program to read them.

Working as Uninterruptible Power Supply (UPS)

Now it is possible to specify a low-voltage threshold and a recovery voltage threshold to Zero2Go Omini. Zero2Go Omini will gracefully shutdown your Raspberry Pi when all input voltages are below the low-voltage threshold, and will turn on your Raspberry Pi when input voltage is higher than the preset recovery voltage threshold.
This feature is very useful for applications powered by battery, and with proper configuration Zero2Go Omini can work as a Uninterruptible Power Supply (UPS). You can find more details in the user manual.

MCU onboard

Zero2Go Omini uses an ATtiny841 micro controller. and thanks to that, it has very low standby current (0.1~0.9mA, depends on input voltage).
Also the MCU onboard allows us to define rather complex behavior for Zero2Go Omini. If you have ever used Witty Pi or the first generation of Zero2Go, you know none of them can work with NOOBS, because NOOBS delays the booting and that cause the power cut before actual booting happens. Zero2Go Omini doesn’t have this kind of limitation, it can work very well with NOOBS because it wouldn’t monitor the TXD pin before the booting is finished.

Want to Know More?

You can find more details about Zero2Go Omini in its user manual:

Where to Buy?

You can buy it now from our online shop. Our resellers may also start to resell this product soon.

New Revision of BIG7 USB Hub

BIG7 USB hub is a 7-port USB hub designed for Raspberry Pi, and it allows your Raspberry Pi to connect more USB devices at a time. When using it with Raspberry Pi 3, you can use the 4 pogo pins (included in package) to finish the connection without using a USB cable.
Now we have a new revision of BIG7 USB hub. The newer revision looks very similar with the older one (see the picture below), and it introduces a new feature that allows user to turn on/off the power of USB ports via software or external switch.
From the picture you can see the new unpopulated pin header (P7), which contains ENABLE and GND pins. The ENABLE pin is pulled up to 3.3V by default, if you short it to the GND pin, BIG7 will cut off the power for all USB ports. This feature is useful when you want to save power consumption from the USB devices, or you want to fully reset the USB devices without rebooting the system.
You can connect an external switch to the P7 on board, and use it to turn on/off the power of USB devices.
You can also connect the two pins in P7 to Raspberry Pi’s GPIO header, and control the power of USB ports via software. The ENABLE pin is in 3.3V level, so it is safe to connect it directly to Raspberry Pi’s GPIO header. Below is an example that uses GPIO-23 (BCM naming) to turn on/off the USB devices. You can use any software or library to set the status of GPIO pin.
The new revision does not include the short USB cable in the package. The pricing is the same with the older revision.
BIG7 USB Hub Rev2 is now in stock.

New Product! Witty Pi Mini is a new member of Witty Pi family

Today we are very proud to announce our new product – Witty Pi Mini.

What is Witty Pi Mini?

It is a new member of Witty Pi family and it has pHAT shape. Comparing to its older brother Witty Pi 2, Witty Pi Mini is much smaller (65 x 30 x 4mm) and has (almost) all the functionalities.

What’s New?

It uses a 0.08F (equals to 80,000uF) super capacitor for off-power time keeping, and can keep the RTC time without external power supply for about 17 hours. It is true that Witty Pi 2 with CR2032 battery can keep time for much, much longer, but considering the use case of Witty Pi, that may not be necessary as Witty Pi is suppose to be connected to power supply all the time (otherwise it won’t wake up your Raspberry Pi). Sometimes you may want to move your Witty Pi to another room, or make some special wiring before powering Witty Pi again, 17 hours off-power time keeping should be enough. If you really need a much longer off-power time keeping time, you can make use of the “Vbat” testing pad on the back and connect your own battery for much longer time keeping. You can find more details on page 31 in the user manual.
Different than Witty Pi 2, Witty Pi Mini doesn’t have those colourful jumpers. However the functionalities of those jumpers still exist, but you will use them in a different way. The red and blue jumpers are replaced with two SPDT switches, and the yellow and green jumpers are replaced with zero-Ohm resistor. You can still change the pin used by Witty Pi Mini, but you will need to unsolder the R26 or R27, and wire the pad to the new pin accordingly.
Witty Pi Mini has a red LED on board as power indicator, which will light up when your Raspberry Pi gets powered. This is very handy when you use Witty Pi Mini with Raspberry Pi Zero (W), which doesn’t have power indicator on board. Raspberry Pi Zero (W) should have the 40-pin GPIO header (not included in the package) soldered before connecting to Witty Pi Mini. The plastic screws, nuts and spacers in the package can firmly fix them together.
Although Witty Pi Mini has pHAT shape, it can also be used on other models of Raspberry Pi. In order to get reliable connection and also have access to the GPIO pins, you may need to mount the stacking GPIO header (not included in the package).

What’s Not New?

Witty Pi Mini uses the same software with Witty Pi 2, and the process to install the software is the same.  Also Witty Pi Mini uses the same schedule script so you can our web application to generate the schedule script for it:

Want to Know More?

You may find more details in the user manual of Witty Pi Mini.

Where to Buy?

Now you can buy Witty Pi Mini from our online shop, or from The Pi Hut.