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I highly recommend the compatible Colmi P8 smartwatch with waspos https://github.com/daniel-thompson/wasp-os which enables you to write micropython with access to all device features. You can overwrite the stock firmware using bluetooth without having to open and solder wires.
Does it support notifications?
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Unfortunately they no longer make them. Or at least I could not find any to be bought.
I'm pretty sure they do; even established stores have started carrying them around here. Check out the website as well; there's a bunch of variations of that watch now. I have the original Bip and am very satisfied with the hardware (lasts forever, looks pretty good) and somewhat satisfied with the software (good selection of watch faces, it's gadgetbridge compatible, but activity mode is a tad bit too easy to enter…
I have the Bip S, and was trying to get that for a friend, but as I mentioned... I cannot find them in stock anywhere.
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Unfortunately they no longer make them. Or at least I could not find any to be bought.
You can still get them (in the UK at least) although stock seems low, you can also get the amazfit U. although it's a bit more expensive.
Cool project. I'm starting to become a fan of dual core BLE SoCs though. One small M0 to handle the BLE stack (which typically has to be high priority) and one M4 for the application.
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> And now they are releasing a smartwatch with a 64 MHz core and 64 KB of RAM - some specs you would have expected from a very cheap smartwatch released 7-8 years ago My Xiaomi Mi Band probably has similar specs. I bought it last year. You position this as outdated, but for me, the specs mean that I only have to charge it every couple of weeks.
Sure, if all you need is a watch that only shows you the time, can support a couple of skins and maybe comes with a basic heart rate monitor, then you probably don't need more. But I wouldn't advertise it (like Pine does) as "you can install any OS on it". I wouldn't even advertise it as a smartwatch TBH. It's more like a tiny embedded device to be worn on a wrist, with specs much more comparable to those of an ESP82…
Does this mean there's a free and open-source version of the Nordic softdevice?
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The PinePhone is a special beast that had or still has some supply issues AFAIK (also with the higher value customs issues are more likely). I personally had no issues ordering stuff from Pine64, albeit it did take long.
It’s not a special beast. Everything I’ve ordered from there has some issues with shipping (maybe the rock boards are better). But honestly, that’s to be expected and they make no claims to the contrary. Hopefully the shift to a commercial store will make this better.
Speaking of which, I recently discovered a javascript based open source smart watch. https://banglejs.com It's a little bulky but seems like it could be a fun device to hack around on. I got one recently from Adafruit.