[PLUG] Sending notifications from remote equipment

Bill Barry bill at billbarry.org
Sat Jan 9 18:17:38 UTC 2021


On Sat, Jan 9, 2021 at 11:53 AM Michael Barnes <barnmichael at gmail.com> wrote:
>
> Here's an interesting challenge. Another no-budget project. I have some
> remote equipment that I need to occasionally receive an alarm alert from.
> The equipment provides a contact closure in an alarm condition. In the past
> for this type of thing, I used an old autodialer that simply picked up a
> phone line, dialed a number, and played a recorded message.
>
> In this situation, I do not have access to an old style POTS line. I would
> prefer a text message, potentially to multiple recipients. There is a local
> network with Internet available. I know there are services like Google
> voice that can send text messages over the Internet. I do not have access
> to an SMTP server that can send external email.
>
> I was thinking of something like a Raspberry Pi to detect the contact
> closure and make the notification. I'm just not sure of the software
> mechanism to do so.
>
> Any ideas appreciated.
>
> Michael

A Raspberry Pi, a Google Fi data only sim card and a compatible 4G USB
modem could work. If you are already using Fi for your phone service
you can get the data only sim card for free.

Bill Barry



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