Hey all, any suggestions on how to measure sound in decibels?

Would be great to see some photo of hardware you have to get this working?

If you added a few "environment" sensors to your board these would be perfect to have in every room of the house :-)

And an enclosure of some sort would also help it blend into the decor too.

@nemik looks really well done! Have you considered including some environmental sensors and also publishing those via MQTT? Having one of these in every room of my house would be cool!

Hi guys, I'm creating a small project within a wooden box and I'd like to be able to "reset" the arduino by having one of those pinhole type reset switches... So ideally drill a tiny hole in my enclose and then mount a button behind it which I can then use a paperclip to reset.

The best I've found so far is this... But maybe someone has seen or used something better?

http://www.ebay.com/itm/Lilypad-Button-Board-Module-for-Arduino-/191736126113?hash=item2ca45d1aa1:g:9T0AAOSwGotWiyg8

Thanks for your help guys! I got it resolved....

Is anyone able to help me parse a string using arduino code that is getting returned by a IP based temperature sensor?

I have a URL that I can call and this is what is returned...

{"temp":19.3,"id":"373650"}

I need to just grab the 19.3 so I can store it.....

I appreciate I may not be asking in the best forum based on this not being specifically related to MySensors but any help would be appreciated.....

Is it important to know that all the chickens are in the coup before you close the door or are we just assuming they are all inside at a certain time?

My wife wants me to buy her a cheap IR based "Ding Dong Welcome" type door chime that makes a noise whenever someone enters her shop as she works a lot in the back office.

I'd prefer to pimp it out and make it sound a buzzer in the back office rather than startling the customer.... And why not count foot traffic while we're at it...

Has anyone seen a project like this before?

I appreciate the concern for my well being that everyone is showing so a big thanks for that :-)

I would still like to find something that could be used to create a nice little housing for some sensors that can just be plugged straight into a plug socket. My first thought was a simply little night light but hopefully this topic could highlight some other alternatives. I have done a lot of searching the web and a night light appeared to be the best looking and cheapest approach :-)

By not being battery powered it does mean I can use sensors like PIR for motion and even install a LED to re-instate the nightlight feature but have it controlled from the Home Automation system. Always on would also allow it to be used as a repeater which is another bonus.

Thanks @AWI , I appreciate the advice and I'm fully aware of the risks.... I'll poke around and see what other alternatives there are.... It is probably safer to go with a 5v "wall wart" and try and package something up nicely with that.

It's possible that others may have some advice on this topic too so I'll leave this post open.

At the moment my sensors are plugged into USB phone chargers and are just a mess of ugly wires.... My mission is to now package it up nicely into an environment sensor that can just be plugged into any wall socket and not look too out of place.

My "bright" idea is to start of with a cheap generic 240v LED night light which can be bought for about $5 and then try and retrofit an arduino and a couple of sensors into it without changing the appearance.

These are some photos of the LED Night Light with the cover removed.

I must confess that my knowledge of electronics and diodes, resistors etc is VERY limited and almost none! I don't want to fry any components or cause a fire so any help would be appreciated...

My plan is to remove the LEDs and "tap" into the power supplied to them.
Each one gets supplied with 3v based on my testing, ideally I'd like to get a clean 5v to power the arduino/sensors.... So I'm assuming I can daisy chain them giving me 6v which I could then get back down to 5v using some little device?

Is this the right approach or is there a better way based on what you can see in the photos?

That's a shame...

I've been building something from scratch this weekend to help me learn all about arduinos, WiFi, MQTT etc.... Its taking forever but as of now I have a WiFi based sensor that will send a MQTT message to OpenHAB every time there is a pulse on my power meter.

This is a great result for me 😁

Next step is to decide if I want to try calculate the watts and KwH in OpenHAB or on the sensor end.....

Thanks for the long reply!
Over 100KwH in one day.... Pretty impressive!

I'll have a good slow read of your reply and hopefully I can make some headway.

@mbj said:

I found one way to bypass this problem. Maybe not the most elegant but it works. I used V_VAR2 to send the request for the startup value, picked this up with an item in Openhab and made a rule which did send back a startup pulsecount using V_VAR1 as the sensor sketch expects. Thus the change to the code is very small.

I don't suppose you have a sketch you can share that works with OpenHAB and maybe some detail on the items and any rules you setup in OpenHAB?

Does anyone have the pulse power meter working with OpenHAB?
As far as I can tell it's not really possible because the sketch is firt looking for a response from the gateway about the KwH used to date or something like that.....

Awesome! I'd much rather use a client gateway so might just hold off until the next release of MySensors and then use the MQTT Client Gateway.

I have an old mysensors MQTT Gateway I setup many moons ago and now I'm thinking of setting up a new one using all the latest mysensors code.

Is it possible to run two gateways at the same time so I can get the new one up and running and slowly move all my sensors to it?

If not, does anyone have any recommendations on the best way to proceed?

So when my relay sensor announces itself to the gateway below.... Does it announce the child ID anywhere so I can be sure I'm using the right one?

send: 24-24-0-0 s=255,c=3,t=11,pt=0,l=5,st=ok:Relay
send: 24-24-0-0 s=255,c=3,t=12,pt=0,l=3,st=ok:1.0
send: 24-24-0-0 s=1,c=0,t=3,pt=0,l=5,st=ok:1.4.1

@ahmedadelhosni
Yes my gateway is the MQTT gateway and it has been running for well over a year. It happily posts temp/humidity which my OpenHAB server subscribes to and reads in the sensor readings.

I just need to work out now how to activate a relay :-)