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UUGear news

New Revision of Witty Pi 3!

Today we are proud to announce Witty Pi 3 Rev2: a new revision of Witty Pi 3. This new revision changes the 5V input connecter from micro USB to USB type C, and replaces the onboard linear regulator (LM29150) with switching DC/DC converter (MP4462). These changes give Witty Pi 3 much better ability to output higher current, and also practically widen the range of input voltage.

What’s New?

The appearance of Witty Pi 3 Rev2 is very similar to the first revision (please see the picture below). The locations of headers and switch remain the same, that means the new revision and old revision are physically interchangeable (except that you need to use type C plug instead of micro USB plug, if you want to give it 5V).

To type C connector and the new DC/DC converter is at up-right corner of the board. The table below compares the two revisions with detailed parameters.

Because the first revision uses linear regulator (LM29150), its efficiency drops very quick when the input voltage increase. That means using it on 12V or 24V system is not practical: even if the regulator can work with extra heat sink, the efficiency will be so poor and that ruins the advantage of using Witty Pi, which is saving energy in most cases. Now the new revision comes with a decent switching DC/DC converter, which can work up to DC 28V without adding extra heat sink, and still keeps the efficiency above 80%, that is indeed a comprehensive improvement.

Firmware and Software Update

Witty Pi 3 Rev2 comes with newer version of firmware (V1.03, with ID=0x23). This firmware allows setting the power cut delay to a bigger value (up to 25.0 seconds). The purpose for this update is to workaround the boot delay caused by USB boot or NOOBS. More details can be found in its user manual.

The software is also updated to V3.12, to allow users to actually set a longer power cut delay. Also the we made some improvements on Internet time synchronisation, to avoid writing incorrect time into system, when the network is not stable.

UUGear Web Interface (UWI) is also updated to V1.01, to support the new revision of Witty Pi 3. When you install the new software, it will install the latest UWI for you (given you don’t have “uwi” folder in your home directory).

Please notice the firmware and software update are not dedicated for Witty Pi 3 Rev2. Witty Pi 3 (Rev1) and Witty Pi 3 Mini can also use the new firmware and software. However you will need to upgrade the firmware by yourself.

Price and Where to Buy?

Witty Pi 3 Rev2’s retail price is 570 CZK (about 22.01EUR  /  19.30GBP  /  26.40USD).

You can order it from our e-shop or you may be able to order it from our resellers soon.

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.

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:

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

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:

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.

New Revision of Witty Pi 2

Witty Pi 2 is a HAT-shaped add-on for Raspberry Pi that adds accurate realtime clock (DS3231SN) and power management, which allows you to define complex ON/OFF sequence of your Raspberry Pi with simple script. Witty Pi 2 is one of our flagship product and is becoming more and more popular recently. Today we announce the second revision of Witty Pi 2, which only has slight difference on the look and introduces a small enhancement, yet significantly simplifies our assembly process.

The figure below shows the different look of reversion 1 and reversion 2:


Until recent days, both Witty Pi and Witty Pi 2 use a rather complex assembly process. The 40-pin stackable header needs to be soldered manually on the board first, and then a plastic pin holder will be pressed on the board, to make the board look nicer.


Soldering the 40-pin stackable header is a huge workload, and we could hardly bear it, as the demand of Witty Pi 2 goes higher. So we take the idea from the Sense HAT, and use a surface-mounted female header to assembly the stackable header.


Witty Pi 2 (reversion 2)


This SMD female header is customised, and has only 2mm plastic height (the one on Sense HAT has 3.5mm plastic height). This slim header can make sure the stackable header be hold firmly, and still has enough length of pin exposed on top. This female header increases the BOM cost, but it saves us a lot of time on soldering the stackable header.

Although the stackable header is fixed in place, you can still take it away if you wish. By doing so your Witty Pi 2 becomes a very slim board and more suitable for portable project. For example, you can connect it with Raspberry Pi Zero:


In reversion 2, we also made a small enhancement on the design, and prolong the delay time (for 2~4 seconds) before Witty Pi 2 cuts the power. The purpose of this enhancement is to avoid “hard shutdown” unintentionally. This change doesn’t make Witty Pi 2 more NOOBS friendly, since the delay on NOOBS menu is way longer. You will still need to avoid using NOOBS, or disable the NOOBS menu to make Witty Pi 2 work. More details about this issue can be found on page 5 of Witty Pi 2 user manual.

The second revision of Witty Pi 2 is now in stock, and the pricing is the same with the first revision.

The 7-Port USB Hub is Back with New Name!

Happy New Year everyone! We wish you all the best in year 2017!

Today we are glad to announce our newer revision of the 7-port USB hub, and this time it has a new name: BIG7!



What’s New?

Comparing to the previous revision, BIG7’s look doesn’t change a lot. You can see two more pogo pin holders near to the upstream port, which can install two more pogo pins to make data connection to Raspberry Pi (B+, 2B or 3B) without using a USB cable. As a result, your Raspberry Pi (B+, 2B or 3B) now have a very neat solution to increase the number of USB ports.



Considering the pogo pins need to connect to 4 points on the back of Raspberry Pi now,  we changed the crown head pogo pins to cupped head pogo pins, which is much easier to make the alignment.



Want One?

The price is the same with previous revision (480 CZK per unit), and you can buy it now from our online shop.

New Product: Zero2Go can power your Raspberry Pi in many ways!

Some customers have asked us if we have a product that can do power switch like Witty Pi 2 and accepts higher input voltage, now we proudly announce that we have one!


Zero2Go is a Pi-Zero sized power supply board that can accept 5~26V input and output 5V for your Raspberry Pi. It also has a button on board, so you can turn on and off your Raspberry Pi with a single tap (just like Witty Pi 2).


Thanks to the wide range of input voltage, Zero2Go can power your Raspberry Pi with many kinds of power sources, such as power bank, Li-Po battery pack, solar panel, car battery or different kinds of power adapters etc.


You can use the pogo pin connector (included in package) to connect Zero2Go with Raspberry Pi without soldering.



Or you can solder a 40-pin header (not included in package) on Zero2Go to connect it with other models of Raspberry Pi:


How Much? When and Where to Buy?

The price of Zero2Go is 350 CZK, which roughly equals to 12.95EUR/10.85GBP/13.65USD.



Zero2Go is now in stock and you can order one here.




New Revision of Zero4U (for V1.3)


Due to the high demand of Zero4U, we have to manufacture this product faster. We made a new revision of Zero4U, which modified the layout a little bit, and use the SMD version of  XH2.54 connector and 12MHz crystal. Hence these two components do not need to be soldered manually, and the assembly can speed up a lot. The figure below shows the different between the two revisions:

rev2_vs_rev1As you can see, the XH2.54 connector has been moved to the right side, and the IC and crystal are moved to the center now. All USB ports and pogo pins are not changed. The sizing, functionality and pricing of the device are the same between two revisions.

We have the new revision in stock. If you order Zero4U (for V1.3) now, you will get the new revision.

Witty Pi 2: the New Witty Pi


Witty Pi has been in the market for more than a year, and it got public praise at the first place. By integrating realtime clock and power management into one board, it allows defining complex ON/OFF sequence with simple script, which is very welcome by users. Today we go a step further, and announce the new generation of Witty Pi: the Witty Pi 2.

What’s New?

First let’s compare the appearance of Witty Pi and Witty Pi 2:

Witty Pi

Witty Pi

Witty Pi 2

Witty Pi 2

Both boards have exactly the same size. The two pictures are with slightly different scale, that’s why Witty Pi 2 looks bigger. As you can see, both boards are quite similar. The switch and micro USB connector are not moved in Witty Pi 2, so the acrylic case will still fit.

The obvious differences are the jumpers, there are 4 colorful jumpers now. The newly added blue jumper is to enable/disable the pulsing dummy load on board. If you are using power bank to power your Witty Pi 2 + Raspberry Pi, you may need this pulsing dummy load to keep your power bank alive without drawing too much current.

Also you can see a new 6-pin female header on the top-right corner. This header breaks out some important signals (+5V, LED, RTC_INT, Vbat and Switch) on the board, which makes integration with other boards become easier. You can also use this header to connect an external switch (physical or electronic) to control your Witty Pi 2. Driving an external LED is also an easy work now.

You may also notice the chips are different. In Witty Pi 2, we use much better chips (DS3231SN, AO4616L and SA555), which have much wider operating temperature range. This means your Witty Pi 2 can work outside under much tougher environment. More importantly, the new DS3231SN chip is very accurate (annual error < 5PPM), and it has temperature sensor inside! With the new software you can read the temperature around your Raspberry Pi 🙂


There are some improvements that could not be found in the picture too. Witty Pi 2 doesn’t use the TXD pin any more, hence using serial port for (huge) data transaction will not have any problem in Witty Pi 2. Also the famous “dead lock” problem, which is caused by ungracefully power off, is now solved at hardware level. Without the possibility of “dead lock”, Witty Pi 2 has much better reliability than the old Witty Pi.

Also the battery life has been extended a lot, thanks to the low power consumption of the new DS3231SN chip, which only draws about 3uA current from the battery, when no power supply is connected.

It is quite safe to replace Witty Pi with the newer Witty Pi 2, since Witty Pi 2 has the same interface with Witty Pi,  and Witty Pi 2 can even work on Witty Pi’s software (but not the reverse).

How Much?

Comparing to the old Witty Pi, the material cost of Witty Pi 2 has been significantly raised, mainly due to the high price of DS3231SN chip. As a result, we have to raise Witty Pi 2’s price to 480 CZK per unit (about 17.76 EUR, or 14.88 GBP, or 19.68 USD).

When Can I buy One?

We open the pre-order channel for Witty Pi 2 today, and you can pre-order it in our online shop. We will start the shipping of Witty Pi 2 on about 20th July, 2016.

Pre-order Witty Pi 2

How About the Old Witty Pi?

The old Witty Pi is now officially retired. We will not manufacture the old Witty Pi any more, unless our customer request to make a customized batch.



Update on 2016.07.20:

Witty Pi 2 is officially in stock now.


Zero4U for Raspberry Pi V1.3

On 16th May we got two news, one is good and one is bad to us. The good one is that Raspberry Pi Zero finally back in stock and it comes with a new feature (camera interface)!  The bad one however, is the PP22 and PP23 testing pads on PiZero has been moved a little bit, which makes our newly launched Zero4U product incompatible with the new Raspberry Pi Zero. The figure below is from the blog post on Pimoroni and it clearly shows what has been changed in the new PiZero.

Difference between PiZero V1.2 and V1.3

Difference between PiZero V1.2 and V1.3

On the same day we got a lot of orders on Zero4U. It was because of the fact that, many people finally got a Raspberry Pi Zero without knowing the Zero4U could not work with it. That day was a long, long day, and we updated the Zero4U product page immediately and included warning information everywhere. Also we emailed to our customers who ordered Zero4U on the same day and asked for confirmation before shipping out their Zero4Us.

Also on the same day we decided to manufacture another batch of Zero4U that can work with PiZero V1.3. The first problem to solve is to get a new Raspberry Pi Zero, so we could update our design. Great thanks to our partner ThePiHut, they kindly sent us a new PiZero on the other day. We were a little out of luck as the United Kingdom Royal Mail system didn’t work well in the coming few days, and we finally got the new PiZero after 10 days waiting. We finished the design update on the same day we got the new PiZero, and submitted it to the factory. We did our best to accelerate the process, and then wait with hope. The new design changes the position of two pogo pins so they can connect to the PP22 and PP23 testing pads on the PiZero V1.3.

After more than 2 weeks waiting, today we finally get the new Zero4U back from the factory! We still have the older version of Zero4U in stock, just in case you have PiZero V1.2 and want to get a USB hub for it.


We will make the testings and packaging in the coming few days, and we are expecting to begin the shipping from Thursday (2016.6.16).

Now you can pre-order your Zero4U for PiZero V1.3, so you can get one as soon as possible.

If you still want Zero4U for PiZero V1.2, you can buy it here.

Zero4U is Now in Stock, with Optional Acrylic Case Together

Last week we announced our new product Zero4U, and today this nice little one is officially in stock. Tomorrow we will ship out the first batch of Zero4U 🙂

Zero4U: 4-Port USB Hub for Raspberry Pi

Zero4U: 4-Port USB Hub for Raspberry Pi

Also there is now an Acrylic case available, which can hold Raspberry Pi Zero and Zero4U together:

Acrylic case that holds Raspberry Pi Zero and Zero4U

Acrylic case that holds Raspberry Pi Zero and Zero4U

You can click the figure to view the details, there is also an assembly guide on its product page.

New Product: Zero4U is Coming Soon!

About two months ago, we released our new 7-port USB hub for Raspberry Pi. Today we are going to announce another new product: Zero4U!

As implied by its name, this new product is designed for Raspberry Pi Zero. More specifically, it is a 4-port USB hub for Raspberry Pi Zero and it is designed to build Raspberry Pi Zero with 4 USB ports. This USB hub has 4 pogo pins on its back, and they will contact to the testing pads on Raspberry Pi Zero, if you mount them together, back to back. These pogo pins will establish the data and power connections between USB hub and Raspberry Pi Zero, so you don’t need to solder wires between them any more.



Zero4U: 4-Port USB Hub for Raspberry Pi Zero

The USB hub will take power from Raspberry Pi directly (via the pogo pins), and can output up to 2A current in total for all USB ports. There is a blue LED on board that will work as a power indicator (which Raspberry Pi Zero doesn’t have). Besides each USB port, there is a white LED that will work as data indicator. If you connect USB device to any USB port, its data indicator will light up.



Zero4U gets powered from the Raspberry Pi Zero, and powers all USB devices

Although this USB hub is designed for Raspberry Pi Zero, you can use it on other computers. Just use a USB cable to connect the mini USB port to the up-stream USB port, then it is ready to rock.

The price for this USB hub is 200 CZK (about 7.40 EUR, or 8.40 USD, or 5.80 GBP), and the package also includes the plastic nuts, screws and standoffs for mounting the USB hub and Raspberry Pi Zero together. At the time being, this product is not in stock yet, but we are working hard to make that happen. Hopefully it will be in stock in two weeks. If you want, you can back-order it now, and we will ship it to you as long as it gets stocked.

The New 7-Port USB Hub for Raspberry Pi

Dear friends, it has been a while not having news from us. Today we are very excited to announce our new product: the new 7-Port USB hub for Raspberry Pi 🙂

You may still remember that UUGear’s first product was a 7-port USB hub, which had been launched at year 2014. Comparing to the old version, this new version of 7-port USB hub is compatible to all Raspberry Pi models, including model A, B, A+, B+, 2B and the newly released Raspberry Pi Zero! This USB hub has the same size with Raspberry Pi A, B, B+ and 2B, and has mounting holes for different models of Raspberry Pi.

This USB hub has multiple transaction translators (MTT), which support USB 2.0 high speed transactions (480 Mbps) on each USB port. The 7 USB ports are symmetrically placed aside the 3 edges, giving more room for each USB port and avoid the collision between connected USB devices.

Two mountable pogo pins are also included in the package, and could be optionally used to back-power your Raspberry Pi when back-feeding from upstream USB port is not supported (Raspberry Pi B+ and 2B).

Attach Pogo Pins for Back-Powering Raspberry Pi

The 7 output pins on board could be used to electronically monitor the port usage status. They are in 3.3V level and can be directly connect to the GPIO pins on Raspberry Pi.

Monitor port usage via the digital output pins

If you are interested in more details about this product, you can check its product page, or view its user manual.

The price for this USB hub is 480 CZK (~20 USD, or 17.7 EUR, or 13.9 GBP). It is in stock today and you can order it from our store.


Update on 2016.02.29:

Now it is possible to put this USB hub with Raspberry Pi together into an Acrylic case:


If you also have Witty Pi on hand, this Acrylic case may be perfect for you 🙂