remote monitoring

What is everyone using to monitor their growing environment? I am looking for something that I can keep a check on my humidity and temps from my phone and remotely turn on or off fans, lights, etc. I've found sonoff and it is cheap enough. I am considering the 4 channel pro for switching needs...

I want to share my experience with the Netatmo Weather Monitoring System. Is it expensive? $150 you decide. For some that's chump change, for others that's groceries for a month. But for me the peace of mind it brings is more than worth it. I was looking for a way to monitor the conditions in...