How to start deskclock timer via NFC I am trying to start the timer of the deskclock app that comes with Android 4.2 using a NFC chip. I am not trying to write an app that does this but rather use one of the many NFC launcher apps.

I can't seem to find if that is possible at all... AnyTAG NFC launcher for example is able to launch the deskclock app but not set any parameters or just launch the timer part.
Llama will let you launch a custom INTENT when it receives an NFC signal. I have not used this part of Llama, as I don't have NFC on my phone, but I have used it to create a custom INTENT.

This raises the question of whether you can set a specific timer and start it with an intent. I don't know if this is possible with the built-in app; you'd have to do your own research on that end.

But you could use Llama instead for the timer as well (if you can live with only whole minutes for the timer). Add a delay to the event, so that it will do something after X minutes of receiving the NFC scan. You can have the phone play a song, vibrate, launch another app, or basically anything supported.