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Only one variant has buzzer that is actually audible from a distance
Do you know if there's a reliable way to get that one with louder buzzer? What kind of sounds can it produce? Could I connect it to my Bangle to have it act as a small speaker?
Ganblejs-
Do you know if there's a reliable way to get that one with louder buzzer?
No, I don't even know which seller it was and even then the stock could change. But I bought 10 pieces of bigger "7525 Passive" one from https://www.aliexpress.com/item/32864653388.html and desoldered the small one and wanted to solder some thin wires to it put it to some space inside (it does not fit on the PCB and the case is too thin there anyway), I verified it fits in one place in the center where the thin hole is but did not actually finish it. With the slightly bigger one with rechargeable battery it could be done too there is even more space inside but maybe desoldering the buzzer on that one may be more complicated without hot air. However the rechargeable battery could last longer with the buzzer than CR2032.
fanoush
Oh, bad luck. All I got were good nrf52832, no issues at all.
First I ordered
https://www.aliexpress.com/item/1005005845252482.html , https://www.aliexpress.com/item/1005005829460356.html and
https://www.aliexpress.com/item/1005005820599424.html one was different board than the other two, these were relatively expensive - about $9 including shipping. Then I got few more of this third variant with empty SPI flash pads - current link in previous post, these were cheaper.
Now I have 3 flashed with Espruino, each board different variant, and also got couple of spare unused ones of the third variant - could send you some to Germany if you don't find good seller. Only one variant has buzzer that is actually audible from a distance, the rest is very quiet so the buzzer is mostly worthless - maybe good as a feedback that you clicked the button but the microswitch click is good enough for that too. Or maybe as a feedback that NFC communication started but when using the phone it already vibrates for that.