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yes, the
poke32(0x10001014,0x7A000);while(!peek32(0x4001e400));
line is unique to Bangle 1 watch as per https://github.com/espruino/Espruino/blob/master/targetlibs/nrf5x_12/nrf5x_linkers/banglejs_dfu.ld#L14 for all other nrf52832 devices it is different value https://github.com/espruino/Espruino/blob/master/targetlibs/nrf5x_12/nrf5x_linkers/secure_dfu_gcc_nrf52.ld#L14anyway, the device is bricked now, you need to take it apart and use SWD debugger to restore at least that value at
0x10001014
to get it booting again -
no, not me, but @yngv126399 did something with adding e-ink to Magic3 recently and other people mentioned some stuff on discord over years with some photos. but I guess you already opened it many times so you already know the inside,
here is some recent photo of PCB, at least the TXD and maybe the one next to it (RXD?) and one button pin should be usable? -
It is very old watch now, likely nowhere to be found for years already. Just checked and I bought F18 on aliexpress in 2019, you can't even buy much newer watches.
it is this thing https://www.amazon.co.uk/F18-Smartwatch-Bluetooth-Waterproof-Pedometer-Red/dp/B07JLV7ZF1
here is youtube reviewhttps://www.youtube.com/watch?v=tpjtu02M_DI
EDIT: you also can't find it on https://www.dtno1.com/search/index.php?keyword=F18 which is company that sold it, google "dt no.1 f18"
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fanoush may know of a band that could work and is still on sale
DS-D6 was unique because it has two generic GPIOS on the usb data pins. Only few smart bands made by same Desay company had this feature DS-D9,DS-D6, HX03(W,F) and also SMA Q2 had it. Sadly none are available for sale nowadays. I don't have any more new DS-D6, only few used used ones (maybe atc1441 https://youtu.be/3gjmEdEDJ5A?t=6
still has some ?) , I still have two boxed HX03W.If you just want nrf52 device with battery and screen and don't mind taking it apart to get GPIOs then the Magic3/C17 is cheapest and is even nrf52840 and relatively easy to open (price is about 11EUR with shipping and taxes from aliexpress)
Oh, that explains it. It is is the same item I have wishlisted but I get "Sorry, the page you requested can not be found:(" when clicking it. In wishlist I have "Currently unavailable" next to it. So it is some geo restriction if you still see it. It worked for me some time ago.
EDIT: Oh I see small text "Sorry, this item's currently unavailable in your location." there too.
And I see it also on this
https://www.aliexpress.com/item/1005002480008305.html
which should be Lenovo HX11 / Desay DS-D20F band possibly with gpios on USB too. https://fccid.io/2AEMN-D20 Maybe somebody can see it?