I got the exact same behavior. (was working, but then not anymore even when restarting, deactivating blutooth and reactivating it and so on...) The reader 2 is found in bluetooth section as "DATECS BLE", i can even pair them... but it's not found inside the android zettle application itself... To add to this, i have an iphone, in which the zettle app has no issue to connect to the exact same reader. (not at the same time... i switch it ff when testing the android device) I have a second and a third Android devices, that exhibit the same behavior even if they are from different android version (9, 10 and 11) and different brand (Lenovo, Teclast, Xiaomi)
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