Poor man's home intercom

A few weeks ago, I decided to set up a DIY home intercom system.  This was motivated by the fact that my son has been doing home-school and we set him up a workspace in the basement.  This isn't a problem per se, but my wife usually doesn't go down there with him if he's doing independent work, which means there's often yelling up and down the stairs.  This is, shall we say... somewhat distracting when I'm trying to work.

I did a little searching for intercom systems, thinking I might buy some hardware, but decided that looked like too much work.  We'd have to find a home for it, and then you might not hear it if you were on the other side of the house, unless I put them everywhere, which is an even bigger pain.  Besides, it seemed like there should be an app for that.  And since we pretty much have our phones close to hand most of the time, that would be more convenient than dedicated hardware anyway.

Turns out there is an app for that.  A number of them, actually.  The one I decided to go with was Zello, which is a fairly simple walkie-talkie app.  I went with this one for a few reasons:

  1. The mobile app is free, at least for personal use.  (There's a PC version too, but that's only for paid corporate accounts.)
  2. It's in the Amazon and Google Play app stores.
  3. It's easy to set up.
  4. It's really easy to use.

The setup process for Zello was pretty basic.  For my son, I decided to just put it on an old Kindle Fire that I had laying around.  It can just sit on the desk, plugged in and ready to use whenever we need to talk to him.  My wife and I just put the app on our phones.  From there, you just create an account (which only requires basic information) for each device using the app, and then send a contact request to the other accounts.  Once your request is accepted, that person will appear in your contact list.

Actually talking to other people is even simpler.  You just tap on the person's account from your contact list and then you get a screen with a great big "talk" button in the middle.  When you want to talk to the person, you just press and hold the button and start talking, just like an old-fashioned walkie-talkie.  When you're done, you release the button.  From what I can tell, the connection is not in real-time - it seems like the app records your message and then delivers it, so you are less subject to the vagaries of the network.  But barring networking issues, the delay seems to be pretty short - a few seconds in most cases.

The app also has a few other features, including very basic text messaging.  There's also a "channels" feature, which I haven't used yet.  That's their "group voice chat" feature.  Presumably the idea is to mimic a dedicated frequency for a CB radio.  The primary use-case for the commercial version of Zello seems to be for fleet dispatchers, so the interface seems geared toward a simple replacement for a traditional radio system.

Overall, the app works pretty well.  It was easy to set up and it has definitely saved some frustration in terms of yelling back and forth across the house.  Also, my son seems to like using it.  He even ends is messages with "over and out".  So I count this as a win.

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