Yubikey 5 NFC firmware 5.4.3

[zkzkzk2015]

What version of Keepass2Android are you using? 1.14 r4
I am using Yubikey with Challenge-Response. It just worked fine. Now I am trying Challenge-Response touch. On my linux machine it is just working fine even with static password. Everything is working without typing.
My phone is not playing along: static password not working & challennge reponse via NFC is not working neither.
i guess my question is: is this supported by keepass2android or do i need go back and "untouch" my slot programming on my Yubikeys?

my log
30/11/2025 10:56:22:273 -- AppSettingsActivity.OnPause 93 30/11/2025 10:56:26:68 -- AppSettingsActivity.OnStop 93 30/11/2025 10:56:28:771 -- Cancel autofill not implemented yet. 30/11/2025 10:56:28:791 -- parsing autofillStructure... 30/11/2025 10:56:28:792 -- Parsing done 30/11/2025 10:56:28:792 -- cannot autofill 30/11/2025 10:56:28:843 -- parsing autofillStructure... 30/11/2025 10:56:28:844 -- Parsing done 30/11/2025 10:56:28:844 -- cannot autofill 30/11/2025 10:56:41:435 -- AppSettingsActivity.OnStart 93 30/11/2025 10:56:41:436 -- AppSettingsActivity.OnResume 93 30/11/2025 10:56:41:436 -- DB null 93 30/11/2025 10:56:44:544 -- AppSettingsActivity.OnPause 93 30/11/2025 10:56:53:819 -- AppSettingsActivity.OnStop 93 30/11/2025 10:56:55:346 -- AppSettingsActivity.OnStart 93 30/11/2025 10:56:55:347 -- AppSettingsActivity.OnResume 93 30/11/2025 10:56:55:348 -- DB null 93 30/11/2025 10:56:57:149 -- AppSettingsActivity.OnPause 93 30/11/2025 10:57:01:8 -- AppSettingsActivity.OnResume 93 30/11/2025 10:57:01:8 -- DB null 93 30/11/2025 10:57:04:452 -- AppSettingsActivity.OnPause 93 30/11/2025 10:57:05:354 -- AppSettingsActivity.OnStop 93 30/11/2025 10:57:09:646 -- AppSettingsActivity.OnStart 93 30/11/2025 10:57:09:646 -- AppSettingsActivity.OnResume 93 30/11/2025 10:57:09:646 -- DB null 93

[zkzkzk2015]

I now learned using keepassdx app works with my Yubikey. I still have to touch my Yubikey to open my keepassxc database, but it is working. Maybe someone knows why it is not working with keepass2android?
PS: Earlier I wrote my static password is not working neither with keepass2android. What i mean is, your Yubikey got two programmable slots and one is used to store my passphrase for my database, because it is too long to remember. Second one is used for challenge reponse.

[marcdw1289]

My Yubikey (not sure of firmware version) works fine across all of my phones and tablets with keepass2android. It does, however, require(?) the use of a driver.
When installed, after entering password in kp2a a dialog will popup. Choose the yubikey slot. A ykdroid dialog will popup asking to handle the key. Then just scan the key using NFC or plug in to device using USB-OTG adapter (for non NFC devices) where it will automatically take. Button press not needed.

Try the below.

ykDroid (YubiKey challenge-response USB and NFC driver)

Description:

ykDroid is a USB and NFC driver for Android that exposes the
challenge-response feature of YubiKeys for use by other Android apps. Both USB and NFC (YubiKey NEO required for NFC) are supported on compatible devices.

Apps supporting it include e.g. Keepass2Android and ykpass.

EDIT: There's actually a lot of previous issues about this topic. Just search for "ykdroid" if you have any hiccups.

[zkzkzk2015]

Interestingly enough I used a Yubikey for at least 2 years and did not need a driver. Now, when I turned on touch feature on Yubikey it stopped working. Unfortunately I did not read about ykdroid. Thank you.