rain sensor signaling

[seanmjones]

I don’t yet have a rain sensor, so I am trying to feel this out by digging through the code…

I would like to send a signal when the rain sensor detects rain. Am I correct that this doesn’t exist in the code as of 5/6/15 19:00? (SHA 293ac17f39c789b778f12e85bbe5e7a26646f31e)

Do I just need to:
rain_sense = signal(‘rain_sense’)
in helpers.py;

then in helpers.check_rain() do:
rain_sense.send()
when setting gv.sd[‘rs’] = 1?

Does that make sense? Is it that simple or am I missing something?

Thanks,
Sean

[Dan in CA]

Hi Sean,

You are correct that this signal does not presently exist. It would be useful so I plan to added it.

To make it work you would add something like:

from blinker import signal

rain_sensed = signal('rain')
def signal_rain():
    rain_sensed.send()

near the start of helpers.py (just before the function definitions section).
you could then add the signal_rain() function when setting gv.sg[‘rn’]= 1 as you said but when I tested this it sent the signal once per second.
Adding

if not gv.sd['rs']:
    signal_rain()

will only send one signal when rain is detected.

To use the signal you will also need to have something like:

def do_on_rain(name, **kw):
    print "Rain Sensed"
    #  rain is detected in helpers.py
    # Put your code here to do whatever you want. 
    
rain_sensed = signal('rain')
rain_sensed.connect(do_on_rain) 

Those last 2 lines will trigger your “do_on_rain()” function when the signal is received.

Dan

[Author]

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