On the first occasion, grant access to the Calibur app to access required services on your phone
After launching the app, a tutorial will lead you through the steps of connecting your pocket boxes to the mobile device. If you want to, you can disable this function later on in the settings.
To select your discipline, push the weapon icon in the middle
Now, turn on your pocket box - push the button in the middle firmly. Normally a blue light above the button should indicate that it’s turned on. If you see a pulsating red light, that means your box is low on battery and needs to be charged before using it.
Select the fencing icons on the bottom of the screen - your device will connect to the closest pocket box to the chosen side.
After connecting both fencers successfully, try on- and off-target hits! (Always test in real, bootleg circumstances, wearing a full fencing uniform, and imitate real-life touches! Do not touch the blades with your bare hands or keep your tip pressed!)
You can customize your scoreboard with a selection of features by pushing the middle button on the screen, between the fencing icons.
What is the firmware and why is it important? Here’s your quick guide to update your firmware for getting the most out of your wireless fencing experience!
The firmware is a software that runs on your Calibur pocket boxes. It is important to keep the Calibur application, as well as the firmware updated, because we are constantly working on making Calibur easier to use while adding more features and with each update, you will get more out of your device!
After connecting the pocket boxesan automatic message will pop up. If you’re not connected to the internet, it will ask you to be so - in the other case, it will show the current version of the installed firmware and the latest available one.
If your current firmware doesn’t match the latest version, you should tap “update”. Remember, for this, you have to be connected to a stable Wi-Fi network!
The update takes a few seconds and you can follow the progress on the screen. Don’t worry, if during the update, the LED on your pocket box goes dark - it means it’s in update mode.
Once the update is done, you can see the LED in green again. Restart the application, and you are ready to fence!
The aim of the Calibur system is to make fencing available for anyone, anytime, anywhere. In order to make this feature, we had to design a complex way of registering hits and transferring information.
Because of this, there are some, not so obvious ways in which Calibur differs from other scoring methods. Here, you can find a list of some elements that cause no problem while fencing, but sometimes are unusual to our users.
Most of the issues listed here can be avoided by testing your equipment in testing your equipment in full fencing uniform, in a realistic setting.
Bellguard for foil
With some equipment, bellguard distinction on foil has minor issues. We recommend that if you experience such things, turn on the switch for "register on-target hits for bellguard".
This also resolves the problem if you see that at some point, if you are sweaty enough (which means that your gloves are dripping wet), valid hits on you do not register as they should. This can also be resolved with a dry glove too though.
Bellguard for épée
One small bug that might occur is that if you test your épée's bellguard barehanded, while keeping the other weapon's point on it, it registers as valid. This is really easy to avoid, since in a realistic situation, since either putting on gloves or using a quick thrust never results in this error.
Testing without gloves extremely slowly can light the screen
Always test in realistic situations
Speed of registering hits
If you find that registering hits is somewhat slower than it is with the traditional scoring machines, you can augment the speed by:
Closing other applications that are making your mobile device slower
Turning off notifications
Deleting unused apps.
Overwhelmed hardware can cause delay in regsitering
Things to pay attention to when testing foil
In some situations, you may experience peculiarities, but only in circumstances that are extremely rare during fencing, and in case they would occur, it’s probable that no points would be given anyway by a referee.
To avoid misleading test results,
DO NOT hit the lamés on the floor. Always wear full fencing set (gloves, lamés, plastrons) and test on a partner.
DO NOT touch the blade when testing. Make clean thrusts on your partners lamé.
DO NOT keep your tip on the opponents lamé. Make quick hits, like in a real bout.
Slower than realistic hits can causeerror
Test equipment with a quick thrust to avoid error
+1 Hint for athletes: to eventually get better at competitions, you can do more besides training. Get an insight into your daily, weekly, monthly and yearly performance by using sports analytics tools - the most simple one is keeping a log about your bouts (on training and competitions too). Find out how Calibur's bout tracking system works and do everything you can do for that medal!
Did you know it was possible to use remote controls for the Calibur scoreboard to start and stop the timer, add or deduct points, penalties, bouts and priorities? Here’s your quick tutorial on using the Calibur Remote Control Mode!
Once the scoreboard is set up, you will need a second phone or tablet. Download “Calibur Remote Controller” from your application store (Appstore, Google Play, Amazon Store), and open the application.
Push the top button in the “Calibur” app (mode selector) and enable remote control mode.
Toggle the remote slider in the mode selectord
Make sure both phones are connected to the same Wi-Fi network.
In the Remote Controller, type in the local address, shown on the screen of the “Calibur” app.
If you're done, you are ready to manage all the scoring on your smart devices!
Setting the scores, adding cards etc
UsefulHint:
Network speed and your hardware can influence the speed of registering commands; if you wish to improve it, try to close every other application and use a stable network without many users (offline hotspot is also an option).
Last week we introduced the Calibur pocket box. It is once again a major leap in product design and features. Testing it is the last step before actual production.
The plan is something like this: 1.Build a very reliable, stable and accurate device 2. Use that basis to build on all the smart features in the application.
We ran a broad épée test back in November which served as a way to pinpoint the weaknesses, analyze the data and incorporate it into a new device. It’s worth summarizing the major takeaways. Today we’ll cover technical issues and how we addressed them:
Connectivity
Let’s jump start to connectivity. Connectivity is the bread and butter of a wireless system. You can only make wireless as good as the quality of connection is. It is judged by 2 factors: stability and latency. To put it more simply how often the connection drops and how much time it takes for a hit to display. The boxes we shipped in November had inconsistencies in both fields, so we put a lot of effort in fixing it.
Testing connectivity in different setups and distances
A simple way to measure it is how far you can get without disconnecting? Mark a 15 meters strip every 5 meters (having the scoring at the middle of the strip means not any of the fencers would get farther away than 7m and in most cases, even much less), put the devices at each mark and note the results, then repeat with the device in the backpocket, then again while covering it, then with walls in between, then underwater in a tin suit… on each and every phone.
In general Apple devices disconnected much sooner than the ones with Android, but we were able to improve on both systems. The development is pretty obvious on this part, we were able to drive down drops to practically 0. Tested on a dozen different, low-end to high-end phones and tablets connection always remained active. The challenge is now to find an otherwise well-functioning phone that fails this test and I’m happy to tell that we haven't find one.
Latency:
The latency is a bit more complex issue. How long is good enough actually? We found that the threshold for unnoticeable delay to be around 100ms.
Latency consists of 2 parts: how long does it take to send the data and how long does it take for the phone to process it. Let’s check the first part, so back to the marked strip. Put 2 synchronous clocks to the pocket box and the phone and repeat the stability test but this time at each mark sending the same data packet.
The results are again very promising. The delay dropped significantly and stayed low up until around 15 meters. So now it is up to the phone to process it.
Getting the phone's processing time down proved to be harder to optimise than anticipated. But it’s clear that the delay is mainly caused by the application now which will perform much better after restructuring. More on that later.
Accuracy
The idea that accuracy is based on the utilization of the data pool is a sort of chicken-egg problem. To have people using the devices they need to be enjoyable. To be enjoyable people need to use it. So the deal with the broad épée test was that people would be using them even when it’s not so enjoyable and we will quickly follow-on with updates and by the end of the test they will become quasi-replacement for any system on épée.
After a very strong start, restrictions started to kick in in December basically everywhere and the incoming data started to slow down. But we still managed to get thousands of bouts and tens of thousands of touch data. Huge thanks to our testers for keeping up despite all the hurdles! Two things became clear: 1. That the data will be not sufficiently big with the current model (it's not just a matter of the total volume but the constant flow, to make comparison after every version) and 2. that we certainly underestimated how much work it will be to maintain a system and to develop a new one parallel. So we moved forward and put the focus on incorporating the existing data into the next version.
touching plastron, mask bellguard then interchanging the weapons.
The goal was to make accuracy high enough so that fencers will enjoy using the devices in training sessions and the rest of the data will come much easier. The 2 major questions in accuracy are: does it go off when it shouldn’t and do we need calibration to avoid that? We were able to improve tremendously on both aspects.
How-it-works grey box:This is actually the most complicated part. The touches are validated by a model dependent on the electric properties on the weapon. To put it simply we measure these properties, gather them in the cloud where machine learning algorithms process them. Then the validation model is updated based on the new data and feeded back to devices through the application. Instead of measuring one property in the previous iteration now we do 3 and the machine learning fetches those together.
TLDR: The general direction is very clear latency is down, accuracy is up. We are getting through the 3rd wave (so far) of the pandemic and with local clubs shut down, it's more tricky to find the ways for sufficient testing. In our testing the system works well in 90-95% of the cases. So the job for the AI is to close the remaining gap particularly on rare cases. Global testing will start next month with the goal of finding the outlier cases. As soon as the data feed start to improve again so will the system.
In the next posts we will cover the general feedback and future features but for ending watch this video of a short bouting in the office.
