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ofcource, it is here( a lot of variants exist, but this is the first one I think)
https://github.com/JumpMaster/WheelLog

The part that does the checks is here:
https://github.com/JumpMaster/WheelLogAndroid/blob/44b9b2fbdb522d499bcf932baa0decde389f92cf/app/src/main/java/com/cooper/wheellog/WheelData.java#L1070

and the expected characteristics are here:
https://github.com/JumpMaster/WheelLogAndroid/blob/master/app/src/main/res/values/services_kingsong.xml

But the question is not really about the app, it is about the possibility of adding characteristics on 1800 and 1801

In any case I have asked the maintainer of eucWorld, the dominant app for EUCs in android, a derivative of wheellog, to remove 2a02, 2a03,2a05 from his list of checks, and he was kind enough to consider it, so I am all good. But it would still be nice if there is a way to add them.

@gordon, I have a question if possible.

I am trying to make the p8 connect to the wheel, and then replicate the wheel's services and offer them, so that a phone can connect to the watch and then the wheel, like a bridge

It is working, amazing what one can do with espruino, but I have come to a problem.

When it comes to the phone app that I want to use, it does some checks on a list of characteristics and services it expects to find, and closes the connection if one is not there. They are not needed, but it does it anyway.

The code that does the checks is like so:

detected_wheel = true;
BluetoothGattCharacteristic characteristic = service.getCharacteristic(c_uuid);
 if (characteristic == null) {
  detected_wheel = false;
  break;
}

and the services among others are those, that I cannot create.:

<string-array name="kingsong_services">
    <item>00001800_0000_1000_8000_00805f9b34fb</item>
    <item>00001801_0000_1000_8000_00805f9b34fb</item>
    <item>0000180a_0000_1000_8000_00805f9b34fb</item>
    <item>0000fff0_0000_1000_8000_00805f9b34fb</item>
    <item>0000ffe0_0000_1000_8000_00805f9b34fb</item>
</string-array>

<string-array name="kingsong_00001800_0000_1000_8000_00805f9b34fb">
    <item>00002a00_0000_1000_8000_00805f9b34fb</item>
    <item>00002a01_0000_1000_8000_00805f9b34fb</item>
    <item>00002a02_0000_1000_8000_00805f9b34fb</item>
    <item>00002a03_0000_1000_8000_00805f9b34fb</item>
    <item>00002a04_0000_1000_8000_00805f9b34fb</item>
</string-array>
<string-array name="kingsong_00001801_0000_1000_8000_00805f9b34fb">
    <item>00002a05_0000_1000_8000_00805f9b34fb</item>
</string-array>

lines starting with a 'greater than' denote quoted text

because they are on 0x1800 and 0x1801.

The app is wheellog from github, I removed the check and compiled it and it connects fine, but It would be nice if it worked with all programs.

Is it a dead end, of could I add the missing characteristics?

very nice :)

Thank you for this tool.

I already forked it for my p8 scripts, I will get a real Espruino device so that I can contribute back.

https://enaon.github.io/eucWatch/p8.html

you need to be aware, but braking is as natural as accelerating, you just lean backwards and it stops. If you want to do an mergency brake, you bring the wheel in front of you at the same time and step hard on it, it stops quite fast.

I remade the quick panel, it now has app loader and sub settings :)

two small videos, one on alarms and one for the calculator.

I have a nice feature in alarms, where if one does a long hold on the settings page, the current time is auto set to that alarm, so one could move using the finger hours-tenths of ninutes- minutes, and time drags (10:55 becomes 11:05 with a move up in tenths of minutes), thus it can be also used as a timer. :)

the calculator has history that can be used in calculations simply by taping on it, the code is bad but it works nice :)

https://streamable.com/hm0ynu

https://streamable.com/bq5xbe

I leave this video too, as it was the one that got me wanting to get one, three months later I was becoming a superhero. :D

https://www.youtube.com/watch?v=MwoF1K-omHM

They are controlled by changing the center of gravity, think Magneto of the xmen :)

The scripts are for off the shelf (xiaomi/segway) ninebot one c/e/p models,

Here is a more down to earth video I shot myself, very interesting machines I believe.
https://www.youtube.com/watch?v=4nQZtHoyQ7s

Yes the bangle.js seems easier, I really did't know about it when I started playing with the dsd6/p8, I accidentally found a channel where atc1441 and fanoush were hacking things, and got engaged. I didn't even know any javascript at that time. :)

Thanks again for espruino, I really enjoy it. :)

thank you for the welcome Gordon.

i am leaving this little video here, in case someone doesn't know what an euc is.

I really believe that someone with more advanced skills than mine could have his time payed back if he develops a good watch for the euc world, there is not a standalone solution up to now, and there sure is interest.

https://streamable.com/9wh0a1

Hello, thanks to the work of @fanoush and @atc1441, I was able to install espruino on a P8 smartwatch (pinetime compatible) and use it as a dashboard for my electric unicycle.

I just wanted to thank @gordon for the work on espruino, and share my playground if one cares to have a look. :)

https://github.com/enaon/eucWatch