The prototype will be built with a Digispark USB Development Board - Digistump based on an Attiny85 and a 433Mhz Am module.
I have a few photos of what will happen when you have not noticed that he has pull off his clothes. If you do not feel sick quickly then click here.
We have already installed a security cam, but in night mode it's difficult to see, if he is still dressed. I think this little device will make our life again a little bit easyer.