Put the baby-bird to sleep when not actively sensing/watering to save battery power

[michaeljolley]

Current Situation

The baby-bird is using delay(2000) in the loop method to check and send the moisture level every two seconds. However, we won't need to check this often and don't need to use battery power when not actively sensing or watering.

Goals

• [ ] Let baby-bird go to sleep for X seconds and then reawaken
• [ ] Upon startup or reawakening, check moisture level and send to mother-bird.
• [ ] Stay awake until we hear from mother-bird
• [ ] Upon receipt of hydration state from mother-bird:
  • [ ] If mother-bird told us to water, then begin watering and checking moisture level every Y seconds to send updated moisture level to mother-bird
  • [ ] If mother-bird told us to not water:
  • [ ] Turn off solenoid valve if currently watering
  • [ ] Go to sleep for X seconds

[bsatrom]

For the first item, you can use the System.sleep api. https://docs.particle.io/reference/device-os/firmware/argon/#sleep-sleep-. The third overload allows you to set a wakeUpPin, edgeTrigger and time in seconds, and I'd use that even if you don't want to trigger on anything other than time.

If you wanted to use it, you could use it to wake up on a pin that's monitoring battery charge (voltage) a rain sensor, or something else.

[michaeljolley]

You beat me to it. I actually had those docs saved from yesterday and forgot to include in the issue description. Gotta add the other tasks with their doc pages as well. Still got my browser open from the stream with doc links