'MySensoring' a Kidde Smoke Detector. (Completed)

[RJ_Make]

@DrJeff

1. The battery warning is local only, I didn't want to build in a battery circuit as that would reduce battery life.
2. I have a 47uf cap on my radio and seems to work well.

[RJ_Make]

@DrJeff

Oh and no, I don't have the skill set to sniff those signals.. :bowtie:

[DrJeff]

@ServiceXp One last question I think, are you picking up the speaker on the center wire it is @ 4V7 and drops down to -3 or so. where did you find 3V3 speaker connection?
Thanks Almost done!

[DrJeff]

Ok all is Good! I just used the octocoupler minus the perf board,also as a side note I changed the resistor you showed to a 4.7K to keep the current of the speaker from being drowned out, I also added a power header.

and here is the Modded One!

Thanks again @ServiceXp for all the hard work you did to get us this mod. Now 9 more to go! But I will wait and test this one out for a couple of months or maybe I should just build 5 more for now. Any Ideas on how to make this run on external power until power is lost?

[RJ_Make]

@DrJeff Sorry about the delay.. Looks like you figured it out... :-)

You really don't need to build anymore if you are using those detectors through out the house (and they are setup interlocked), as once one goes off, they all go off and will signal to your controller that there is trouble.

[DrJeff]

@ServiceXp You're so smart :relieved: I didn't even think about the alarms being interconnected, thanks for saving my extra radios, Arduinos, and wasted time much appreciated. The only thing I might do is change the radio to the hardwired alarm.

[peterkins]

Building regs call for mains powered smoke alarms interconnected by wireless with battery backup. Has anyone figured how to intercept the signalling between them? Their being mains powered makes them scary to experiment on.

This'll be my first mysensor project with domoticz. Hopefully not biting off more than I can chew.

[Moshe Livne]

@peterkins They are probably 5v inside so you just have to figure out (like ServiceXp did) where to tap in. or, if you want something completely non intrusive just use a sound detector....

[peterkins]

Thanks for suggesting the microphone option. Thinking about it though, these devices are much less scary if i do my tests with them running off the backup batteries.

[macieiks]

Hello,

If I want to use this code on Arduino Mega2560 with support of 4 smoke sensors only thing I need to do is to create "arrays" ?

Regards,
Maciek