ScottG:
rno310:
Hello ScottGSeems like you found an elegant solution to a problem I would like to solve. One year into it, how has your solution performed? Did you get reliable readings? How often did you end up having to change the battery?
It works great. It's very reliable. I think one battery will last all summer. The battery I'm using now was installed May 28, so it's been almost 2 months. You can see the battery voltage over time on Xively (it's channel 15). I've got all the code on GitHub.
Finally had to change the battery. It was down to 2.4 volts - sensor was still working at the lower voltage. But once these lithium batteries start to go, the voltage falls off pretty quick. It lasted 109 days.