Plant power stops working

On the 3rd day, it stops connecting to iphone. I thought it is because I have water it. I try to change battery. And it does not work. I clear the cache in the app. And finally, the least I expected, I turn off and on the iPhone. It works. I think it is the Bluetooth at iPhone that is jam as I turn Bluetooth on and off several times a day. I will leave it on for now.