I moved to Telegram because Whatsapp doesn't allow robots. I have a robot that sends me alerts from the database I manage (lag on the dataguard, tablespace with less than 100MB free, etc). It is really useful.
And wrote down the steps I took to build a bot that sends pictures from an IP camera (in Portuguese): http://alquerubim.blogspot.com.br/2016/02/solucao-caseira-pa...