I'm building a controller for my reef.
Until now, everything is working great: relays control, dosing pumps, temperature, pH etc.
My next 3 things I would like to add to the controller are:
1. Backup battery for the controller
2. Identify when AC power is lost
3. Send SMS for every special event in my reef.
For now, let's focus on the first 2 things.
For the first thing, I found that http://www.seeedstudio.com/depot/lipo-rider-p-710.html?cPath=155
Can you please help me understand if and how it can help me?
How exactly can I connect it to my Arduino? (I have zero knowledge in electronics...)
How can I implement the seconds thing?
Both, Arduino and pH circuit is working on 12v.