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There are many different contact sensors available for use with SmartThings which can detect the door being opened. That part is easy. The question is how do you set up a device to make an audible alert when the sensor send the "door opened" message to the hub?
As of the
summer of 2016, there is no simple chime device available that works with SmartThings. However, there are many different ways to make this work depending on what you were trying to accomplish.
All of these options will require that you also have a contact sensor on the door that you are monitoring, or some other device to notify SmartThings of activity. You will need one sensor per door. These generally cost around $20 each although they can sometimes be found on sale as low as $15.
Amazon listing [https://www.amazon.com/Aeon-Labs-ZW056-z-wave-doorbell/dp/B0182XG27Q/]
'''2 . Power Failure Alert plus SmartThings power outlet (total $35-$55)'''
If you want a more annoying sound, perhaps to discourage a family member from opening the door, or you want a solution with A very easy set up, you can purchase a "power failure alarm," plug it into any networked power source that works with SmartThings, and use the official "smart lighting" feature to turn the power source 'off' when the contact sensor reports "door open." That way when the door is opened, SmartThings will turn off the power to the alarm, the alarm detects the power loss and sounds its beeper.
At $15, the reliance controls plug in power failure alert is a good choice for a beeper device when you want a "door open" alarm which is not as overwhelming as a typical security siren, but is still annoying enough to be a deterrent. [https://www.amazon.com/gp/product/B018A30T8Q/]. There are many similar brands as well. You also need to purchase a SmartThings – controllable power outlet, typically around $20. So this specific setup should cost a little less than the Aeon Doorbell, but only has one sound option.
3. Alarm Clock Alert (Price is the cost of the clock, plus $20 for the outlet)'''
Before the Aeon doorbell
was available, some people would use the same set up as the power outage beeper, but would instead plug in an alarm clock of the kind where once the alarm sounds, it continues to sound until you press the button, and if you unplug it in the middle of sounding and then plug it back in again it continues to sound once the power comes back on. So for this set up you just have SmartThings turn on the power to start the alarm clock sounding and turn off again to stop the sound.
This generally gives you a choice of sounds which are less annoying than the power failure beepers. Some are even suitable as doorbells. The trick is to find one that will go right back to sounding when power is restored. Some models will, some won't, so you may just have to try a few. (If the clock has a battery backup feature, do you not use it – – just take out the battery. You want the clock to be off when the power is off and on when the power is on.)
For this method you still have to buy all three devices: contact sensor for the door, alarm clock for the sound, and networked power source so that there is something for SmartThings to control. Set up is easy, and you can just use the official smart lighting feature. If you already have a alarm clock you can repurpose, then the cost will be lower than the Aeon Doorbell. But this solution will be limited to only one sound option.
4. Various Text to Speech(TTS)/Custom Sound Speakers (cost varies, but is typically $150 and up)'''
Some speakers such as Sonos have the ability to play custom sound files, from dogs barking to spoken announcements, and these can be used. An Amazon echo can also be used as a Bluetooth speaker in a similar fashion. Some device models may require a specific smartapp.
All of the devices in this category cost more than the simple alert devices or the Aeon doorbell discussed above so in most cases you would only choose this method if you already had the speaker device for other reasons.
5. Android as an Audible Alert (requires an android phone/tablet)'''
The LANNouncer app for android (formerly called Landroid) requires an android device. Set up is fairly complicated, but this gives you a lot of different function options. Essentially lets you use an android device in the same way that the TTS speakers work. Community discussion thread with links to the software [https://community.smartthings.com/t/android-as-a-speech-alarm-device-released-and-updated/30282]
'''Smoke Detectors, including the Nest Protect, Cannot be Used for Custom Alerts'''