<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Thanks for the input all. <div class=""><br class=""></div><div class="">My particular application is entirely in the house, possibly via the WIFI LAN. Each person who is participating in the TARPN system has a Raspberry PI, either a 1 B, 2 B, 3 or 3+. The trigger which is inspected, to determine the required behavior, is in the Raspberry PI filesystem, in /usr/local/etc. Our project is actually to build a text messaging network which does NOT use the Internet, linking our Raspberry PIs together to do anything we can come up with. <div class=""><br class=""><div class="">I will create a background service on Raspbian which can inspect the file and then drive a GPIO, or to do some TCP/IP communications to the appliance. </div><div class=""><br class=""></div><div class="">I was thinking of making a 20khz beeper, at the Raspberry PI itself, to alert the dog that I have mail. So my visitors are over and the dog goes off barking up a storm. I announce calmly, oh, I have mail. And as soon as I pull it down using my tablet the dog gets quiet and goes and curls up on the couch. This would have a nice bizzaro-behavior kind of feel to it that appeals to me. </div><div class=""><div class="">Maybe not. Besides, I have cats, not a dog. Next…. </div><div class=""><br class=""></div></div><div class="">I’ve been considering using a single-chip radio and sending a carrier if the alert behavior is selected. Then I’d just need a single chip radio to detect the continuous (> 0.4seconds) of a carrier, and signal with the LED or piezo or relay. I could build the living-room alert device with an Arduino and hat. The Raspberry PI could easily handle programming one of the single-chip radios to send a carrier. 910-ish megahertz would be just fine. There are a ton of those radio-hat/shield/feathers out there, but that would require more assembly than I was looking for, plus there would be a power supply for the living room portion which just looks like more wires. Maybe the challenge would be to make it run for months or years on a battery. Hmm…. But then I’d need to come up with a plan to mass produce them. Well… get enough people together, take orders, kit the thing out, and have a soldering/plugging/programming session. That could happen. </div><div class=""><br class=""></div><div class="">The WIFI controlled lightbulb seemed ideal because the hardware would all be off the shelf and there isn’t even any unique or fragile connections to deal with. I like the idea of having a blue light on next to the TV when there is mail waiting. That will do and not drive the wife nuts. I’m not dying for another project. I’d rather this done short and sweet. What I want, however, is for each and every member of the network to have this service, even if I have to buy all of it. </div><div class=""><br class=""></div><div class="">I am liking the $5 AC switch item. This would be able to light or start anything that runs on voltage, but it is really cheap and obvious. What every other member of our little off-the-grid text messaging network does with it is up to them. I just want to make it really easy. I ordered one of the Sonoff WIFI switches on eBay, not noticing until later that the expected delivery date is as late as Jan 3 2019. ha. WE’ll see what Monday brings. Maybe an evening meeting. I’m really busy on Tuesday though as I’m doing a deal with the Raleigh Amateur Radio society at their meeting and I do need to make sure I prepare for that. </div><div class=""><br class=""></div><div class="">You can see the project I’m working on here: <b class=""><a href="http://tarpn.net" class="">http://tarpn.net</a></b> Network map with the Network link and Builder instructions with lots and lots of details under Builder link. </div><div class=""><br class=""></div><div class=""> Tadd</div><div class=""><br class=""></div><div class=""><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Tadd / KA2DEW<br class=""><a href="mailto:tadd@mac.com" class="">tadd@mac.com</a><br class="">Raleigh NC FM05pv<br class=""><br class=""><b class="">“Packet networking over ham radio": </b><b class=""><font color="#0056d6" class=""><a href="http://tarpn.net/t/packet_radio_networking.html" class="">http://tarpn.net/t/packet_radio_networking.html</a></font></b><br class=""><b class="">Local Raleigh ham radio info: </b><b class=""><font color="#0056d6" class=""><a href="http://torborg.com/a" class="">http://torborg.com/a</a></font></b></div></div></div></div></div></div></div>
</div>
<div><br class=""></div><div><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class="">On Nov 11, 2018, at 9:19 PM, Mike Lisanke via TriEmbed <<a href="mailto:triembed@triembed.org" class="">triembed@triembed.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Actually, there are many IOT devices that include Internet (wired or wireless) and a RGB LED or many ... and many of them are less than $30.</div><div class=""><br class=""></div><div class="">To make you app, all you need is an Internet App which pulls or gets push data and changes it's color. Cool Packages cost money But some of the Adafruit Playground have LED and Sensors and Internet and programming for non-programmers etc. <br class=""></div><div class=""><br class=""></div><div class="">There are also RGB LED WiFi lightbulb but you'll likely have to add an external Internet compute to drive it... I think something like IFTTT can drive it but you'll be putting your Intranet at risk dropping a light bulb on the Internet :-p<br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">On Sun, Nov 11, 2018 at 7:48 PM Pete Soper via TriEmbed <<a href="mailto:triembed@triembed.org" class="">triembed@triembed.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF" class="">
Right. You can buy a smaller number for even less. The instructable
below shows how to control it with a Raspberry Pi.<br class="">
<br class="">
<a href="https://www.instructables.com/id/Control-Sonoff-From-Raspberry-Pi/" target="_blank" class="">https://www.instructables.com/id/Control-Sonoff-From-Raspberry-Pi/</a><br class="">
<br class="">
But you're still going to need invention, and that's the magic that
bridges between what your packet program is doing on the Raspberry
Pi and the actions necessary to invoke the program to turn on the
Sonoff. You won't find that at Amazon Prime, but if you come to the
meeting tomorrow somebody might be able to find out more about how
the packet radio code works and suggest an approach. <br class="">
<br class="">
-Pete<br class="">
<br class="">
<div class="m_-1364604244331529360moz-cite-prefix">On 11/11/18 7:40 PM, Tadd Torborg via
TriEmbed wrote:<br class="">
</div>
<blockquote type="cite" class="">
<div dir="auto" style="word-wrap:break-word;line-break:after-white-space" class="">Hmm.. Very
pretty. Perhaps wishful thinking, but I was looking for
something closer to $50 that didn’t require new invention. </div>
<div dir="auto" style="word-wrap:break-word;line-break:after-white-space" class="">I like what you
came up with. Nice shopping list too. </div>
<div dir="auto" style="word-wrap:break-word;line-break:after-white-space" class=""><br class="">
</div>
<div dir="auto" style="word-wrap:break-word;line-break:after-white-space" class="">Have you ever
seen a Sonoff WiFi Switch ? Amazon has 6 of these for $65. </div>
<div dir="auto" style="word-wrap:break-word;line-break:after-white-space" class="">
<div class=""> </div>
<div class=""><br class="">
<span style="font-size:12px" class="">Tadd / KA2DEW</span><br style="font-size:12px" class="">
<span style="font-size:12px" class=""><a href="mailto:tadd@mac.com" target="_blank" class="">tadd@mac.com</a></span><br style="font-size:12px" class="">
<span style="font-size:12px" class="">Raleigh NC FM05pv</span><br style="font-size:12px" class="">
<br style="font-size:12px" class="">
<b style="font-size:12px" class="">“Packet networking over
ham radio": </b><b style="font-size:12px" class=""><font color="#0056d6" class=""><a href="http://tarpn.net/t/packet_radio_networking.html" target="_blank" class="">http://tarpn.net/t/packet_radio_networking.html</a></font></b><br style="font-size:12px" class="">
<b style="font-size:12px" class="">Local Raleigh ham radio
info: </b><b style="font-size:12px" class=""><font color="#0056d6" class=""><a href="http://torborg.com/a" target="_blank" class="">http://torborg.com/a</a></font></b><br class="">
<br class="">
<div class="">
<div style="font-family: Helvetica; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-east-asian: normal; font-variant-position: normal; letter-spacing: normal; line-height: normal; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; word-wrap: break-word;" class=""><span style="color:rgb(68,68,68);font-family:arial,sans-serif;font-size:small;line-height:16px;background-color:rgb(255,255,255)" class="">"When
you don't know what you're doing, you </span><span style="color:rgb(68,68,68);font-family:arial,sans-serif;font-size:small;line-height:16px;background-color:rgb(255,255,255)" class="">might as well do it quickly" -
Jase Robertson</span></div>
</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Nov 11, 2018, at 2:52 PM, Brian
Chamberlain <<a href="mailto:blchamberlain@gmail.com" target="_blank" class="">blchamberlain@gmail.com</a>>
wrote:</div>
<br class="m_-1364604244331529360Apple-interchange-newline">
<div class="">
<div class="">
<div dir="auto" class="">Hey Tadd,</div>
</div>
<div dir="auto" class="">If you’re talking 10 years ago
time frame I’m guessing you’re referring to the
AmbientOrb. It was a device from an MIT group/project
that signaled the state of the weather, stock markets,
etc... Here’s an article about that device.</div>
<div dir="auto" class=""><br class="">
<div dir="auto" class=""><a href="http://www.nbcnews.com/id/4758931/ns/technology_and_science-tech_and_gadgets/t/new-technology-relies-human-visual-system/" target="_blank" class="">http://www.nbcnews.com/id/4758931/ns/technology_and_science-tech_and_gadgets/t/new-technology-relies-human-visual-system/</a></div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">There have been many of these
types of devices launched as
products/kickstarters/DIY projects since then, in
various incarnations. I’m sure you can find examples
on <a href="http://hackster.io/" target="_blank" class="">Hackster.io</a>. Here’s one
I built:
<div class=""><a href="https://www.hackster.io/breakpointer/ambient-web-connected-color-orb-91b9fd" target="_blank" class="">https://www.hackster.io/breakpointer/ambient-web-connected-color-orb-91b9fd</a></div>
</div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">Also, here’s a more complete
Rpi based tutorial:
<div class=""><a href="https://www.raspberrypi.org/magpi/cheerlights-orb-a-node-red-tutorial/" target="_blank" class="">https://www.raspberrypi.org/magpi/cheerlights-orb-a-node-red-tutorial/</a></div>
</div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">The neopixel from Adafruit is
great for this type of thing.
<div class=""><a href="https://learn.adafruit.com/neopixels-on-raspberry-pi/overview" target="_blank" class="">https://learn.adafruit.com/neopixels-on-raspberry-pi/overview</a></div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">Hope this helps.</div>
<div dir="auto" class="">Cheers!</div>
</div>
<div dir="auto" class=""><br class="">
</div>
</div>
<div class=""><br class="">
<div class="gmail_quote">
<div dir="ltr" class="">On Sun, Nov 11, 2018 at 9:32
AM Tadd Torborg via TriEmbed <<a href="mailto:triembed@triembed.org" target="_blank" class="">triembed@triembed.org</a>>
wrote:<br class="">
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word;line-break:after-white-space" class="">Once upon a time, possibly 10 years
ago, I remember a device which looked like a
light fixture that sat on a desk. It lit up in
color, after it found some token or cue on the
Internet. You could use it to show a weather
alert, or i a certain web page did or did not
responded to pings.
<div class="">I never bought one. Now I need it
for a ham radio project. </div>
<div class=""><br class="">
</div>
<div class="">What I want to do is have a
Raspberry PI that is doing ham radio stuff
(TARPN network communications, in this case)
and have a light, possibly a blinking LED, in
the living room of my house, that would
indicate a message has been received via the
ham radio TARPN network. The Raspberry PI can
have a file that is present or missing, or
filled with some value or another, and the
blinking light needs to use FTP or Telnet via
WiFi to the Raspberry PI and query the file.
Alternatively I could have the Raspberry PI
issue a telnet message to turn the light on or
off. </div>
<div class=""><br class="">
</div>
<div class="">Something like this already
exists. Does anybody know where to get one? </div>
<div class=""><br class="">
</div>
<div class="">Thanks!</div>
<div class=""> Tadd</div>
<div class=""><br class="">
</div>
<div class="">Tadd / KA2DEW</div>
<div class=""><a href="http://tarpn.net/" target="_blank" class="">http://tarpn.net</a></div>
<div class="">Raleigh NC<br class="">
<div class=""><br class="m_-1364604244331529360m_2636960322739545838Apple-interchange-newline">
<br class="m_-1364604244331529360m_2636960322739545838Apple-interchange-newline">
</div>
<br class="">
</div>
</div>
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-- <br class="">
<div dir="ltr" class="m_-1364604244331529360gmail_signature" data-smartmail="gmail_signature">
<div dir="ltr" class="">-Brian<br class="">
</div>
</div>
</div>
</blockquote>
</div>
<br class="">
</div>
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<br class="">
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</blockquote></div><br clear="all" class=""><br class="">-- <br class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Best regards, Mike</div>
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