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<div name="messageBodySection" style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">Charles,
<div><br /></div>
<div>I am working on a project for a CA client who wants to use LoRa. It is not able to send video but is very energy efficient and has range that could easily cover a golf course from a single gateway at the clubhouse. </div>
<div><br /></div>
<div>Depending on where you are, you may also be able to use a LoRaWAN service which has a service provider, I am using MachineQ from Comcast. </div>
<div><br /></div>
<div>It uses the same Low Power Labs RMS69W radios at 915MHz. Hope this helps.</div>
<div><br /></div>
<div>Chip</div>
<div><br /></div>
<div><br /></div>
</div>
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<span style="caret-color: rgb(45, 48, 51); color: rgb(45, 48, 51); font-family: -apple-system; font-size: 16px; background-color: rgb(255, 255, 255);">Chip McClelland</span>
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<div name="messageReplySection" style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">On Oct 25, 2018, 3:43 PM -0400, triembed-request@triembed.org, wrote:<br />
<blockquote type="cite" style="margin: 5px 5px; padding-left: 10px; border-left: thin solid #1abc9c;">Send TriEmbed mailing list submissions to<br />
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Today's Topics:<br />
<br />
1. Re: Coffee roaster (Shane Trent)<br />
2. Long range digital communication (long range wifi, XBee?)<br />
(Charles West)<br />
3. Re: Long range digital communication (long range wifi, XBee?)<br />
(Glen Smith)<br />
<br />
<br />
----------------------------------------------------------------------<br />
<br />
Message: 1<br />
Date: Thu, 25 Oct 2018 14:32:25 -0400<br />
From: Shane Trent <shanedtrent@gmail.com><br />
To: TriEmbed Discussion <triembed@triembed.org><br />
Subject: Re: [TriEmbed] Coffee roaster<br />
Message-ID:<br />
<CAAFjd3raX35XcbvJtf8uVF6aYrircZsAuVpUtHhHX4KQzu+BVg@mail.gmail.com><br />
Content-Type: text/plain; charset="utf-8"<br />
<br />
Craig,<br />
<br />
A hot air roast should take much less than 30 minutes. It was cool this<br />
morning and I roasted two batches, both to medium City Roast (just past the<br />
end of the first crack), and each was less than 6 minutes. I am using a<br />
vintage unit but have had similar performance from other devices. It sounds<br />
like your old air-popper may have had a temperature limit that kept it from<br />
getting hot enough. I did have one popper model that I had to hack into and<br />
bypass the low-temperature thermostat (but it still seemed to roast slow<br />
and did not last as long a unmodified units). In an air popper the roast<br />
should happen so quickly that it is easy to keep an eye on it.<br />
<br />
I put some notes about my current roasting/cooling setup into a blog post.<br />
My controls over the roaster are adjusting the recirculation of heat to<br />
increase the temperature of the air going into the popper and controlling<br />
the ventilation with a bilge blower. I think the photos show most of the<br />
details. I hope it makes sense. Ping me if you have any questions.<br />
<br />
http://fettricks.blogspot.com/2018/10/roasting-coffee-with-hot-air-poppcorn.html<br />
<br />
Shane<br />
<br />
<br />
On Wed, Oct 24, 2018 at 7:53 PM Craig Cook via TriEmbed <<br />
triembed@triembed.org> wrote:<br />
<br />
<blockquote type="cite" style="margin: 5px 5px; padding-left: 10px; border-left: thin solid #e67e22;">I have been using this<br />
https://smile.amazon.com/gp/product/B00XK3ALS0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1<br />
for the last 8 years roasting green beans.<br />
<br />
That has the side vents, takes ~30 mins to roast. Works *really* well. I<br />
burned the motor out 2 weeks ago. It's discontinued. Thought I should<br />
migrate to an arduino based version, hence my questions and asking for<br />
advice on what parts I should purchase.<br />
<br />
Yes, after the roast I dump the beans into a cooling basket.<br />
<br />
I have one of these to replace it:<br />
https://www.gopresto.com/product/presto-poplite-hot-air-corn-popper-04820<br />
https://smile.amazon.com/gp/product/B00006IUWA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1<br />
<br />
Given that new information, would it change the proposed design?<br />
<br />
It will be much better if I can control the roasting process though.<br />
Without control I get a few over roasted beans.<br />
<br />
Thanks for everyone's help.<br />
<br />
Craig<br />
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<br /></blockquote>
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Message: 2<br />
Date: Thu, 25 Oct 2018 15:23:22 -0400<br />
From: Charles West <crwest@ncsu.edu><br />
To: TriEmbed <triembed@triembed.org><br />
Subject: [TriEmbed] Long range digital communication (long range wifi,<br />
XBee?)<br />
Message-ID:<br />
<CAGojqSkE6PJ8tj5cL6YY=ppJxDt=WYamKJ9CdG-1gi9Qga0HGg@mail.gmail.com><br />
Content-Type: text/plain; charset="utf-8"<br />
<br />
Hello!<br />
<br />
I'm in Lansdale, PA now but I was hoping I might be able to pick you guy's<br />
brains. My current big project is trying to build one or more robots to<br />
deliver food/drinks on golf courses. I'm currently trying to figure out<br />
the best way to maintain continuous(ish) contact between a access<br />
point/basestation at it's base of operations and 1 or more robots operating<br />
on the course.<br />
<br />
At a minimum, I would like to have the robot report its basic status<br />
(battery percent, GPS position) but it would also be great if it could<br />
stream video when required to allow teleprescence steering or determination<br />
of what is going on. The robot would probably be about 1 km from the base<br />
station at max.<br />
<br />
I'm currently considering 3 possible solutions but I'm pretty open to ideas:<br />
<br />
1. Use a mobile hotspot/cell modem:<br />
For fixed $130 and monthly $20, I can get a mobile hotspot which<br />
provides one gig of data per month and more data for $5/gig. If I keep the<br />
reporting really light, this could work but the communication would have to<br />
be kept pretty limited.<br />
<br />
2. XBee:<br />
These modules seem to float somewhere between $25 and $60 in<br />
prices, so a pair would be somewhere in the $50 to $120 range. Sparkfun<br />
had a good guide to XBee (https://www.sparkfun.com/pages/xbee_guide) but<br />
they are listing almost all of their products as retired (besides old<br />
series 1) and most of the stuff I read about XBee is from 2015-2016 so I am<br />
not sure what the best options are anymore. In any case, it looks like it<br />
would provide a low baud rate connection over the desired range. The main<br />
problem is that it requires working through XBee and making my basestation<br />
have to have special software to forward information. I'm also not sure<br />
about security and it is certainly not going to be streaming video.<br />
<br />
3. Long range Wifi:<br />
Rodney's done some work in this area before with his weather<br />
balloon projects. I don't recall off the top of my head how far he managed<br />
to get but I do remember he had to use higher power than allowed without a<br />
higher grade amateur radio license. That power level would not work for a<br />
commercial operation. There are some companies that are selling solutions<br />
aimed at farms (http://ayrstone.com/www/?v=7516fd43adaa) and there seem to<br />
be off the shelf solutions that can get 500 ft (mostly aimed at hotels).<br />
The hotel systems seem to be in the $350 range and the farm systems in the<br />
$500 or so. The robot could use a high gain antenna, but it is not clear<br />
how much it helps. These systems have security built in and potentially<br />
can stream video if the range is long enough. Like hotspots, writing<br />
software for them would also be easy.<br />
<br />
What do you guys think?<br />
<br />
Thanks,<br />
Charlie<br />
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<br />
Message: 3<br />
Date: Thu, 25 Oct 2018 14:43:31 -0500<br />
From: Glen Smith <mrglenasmith@gmail.com><br />
To: Charles West <crwest@ncsu.edu><br />
Cc: TriEmbed <triembed@triembed.org><br />
Subject: Re: [TriEmbed] Long range digital communication (long range<br />
wifi, XBee?)<br />
Message-ID:<br />
<CANwtiDV803kUwF2HeFvODfM54s1Bytey0MB3G497okKije-coQ@mail.gmail.com><br />
Content-Type: text/plain; charset="utf-8"<br />
<br />
Charles,<br />
<br />
I played around with Moteinos https://lowpowerlab.com/guide/moteino/ for a<br />
while and had good luck with the RFM69 radios, I don't remember what<br />
frequency I was using.<br />
<br />
I just recently was listening to an episode<br />
<https://theamphour.com/398-an-interview-with-felix-rusu/> of The Amp Hour<br />
where Chris interviewed the guy who makes these - he is getting very good<br />
range depending on all the usual variables. It might be worth checking them<br />
out.<br />
<br />
Glen<br />
<br />
On Thu, Oct 25, 2018 at 3:23 PM Charles West via TriEmbed <<br />
triembed@triembed.org> wrote:<br />
<br />
<blockquote type="cite" style="margin: 5px 5px; padding-left: 10px; border-left: thin solid #e67e22;">Hello!<br />
<br />
I'm in Lansdale, PA now but I was hoping I might be able to pick you guy's<br />
brains. My current big project is trying to build one or more robots to<br />
deliver food/drinks on golf courses. I'm currently trying to figure out<br />
the best way to maintain continuous(ish) contact between a access<br />
point/basestation at it's base of operations and 1 or more robots operating<br />
on the course.<br />
<br />
At a minimum, I would like to have the robot report its basic status<br />
(battery percent, GPS position) but it would also be great if it could<br />
stream video when required to allow teleprescence steering or determination<br />
of what is going on. The robot would probably be about 1 km from the base<br />
station at max.<br />
<br />
I'm currently considering 3 possible solutions but I'm pretty open to<br />
ideas:<br />
<br />
1. Use a mobile hotspot/cell modem:<br />
For fixed $130 and monthly $20, I can get a mobile hotspot which<br />
provides one gig of data per month and more data for $5/gig. If I keep the<br />
reporting really light, this could work but the communication would have to<br />
be kept pretty limited.<br />
<br />
2. XBee:<br />
These modules seem to float somewhere between $25 and $60 in<br />
prices, so a pair would be somewhere in the $50 to $120 range. Sparkfun<br />
had a good guide to XBee (https://www.sparkfun.com/pages/xbee_guide) but<br />
they are listing almost all of their products as retired (besides old<br />
series 1) and most of the stuff I read about XBee is from 2015-2016 so I am<br />
not sure what the best options are anymore. In any case, it looks like it<br />
would provide a low baud rate connection over the desired range. The main<br />
problem is that it requires working through XBee and making my basestation<br />
have to have special software to forward information. I'm also not sure<br />
about security and it is certainly not going to be streaming video.<br />
<br />
3. Long range Wifi:<br />
Rodney's done some work in this area before with his weather<br />
balloon projects. I don't recall off the top of my head how far he managed<br />
to get but I do remember he had to use higher power than allowed without a<br />
higher grade amateur radio license. That power level would not work for a<br />
commercial operation. There are some companies that are selling solutions<br />
aimed at farms (http://ayrstone.com/www/?v=7516fd43adaa) and there seem<br />
to be off the shelf solutions that can get 500 ft (mostly aimed at<br />
hotels). The hotel systems seem to be in the $350 range and the farm<br />
systems in the $500 or so. The robot could use a high gain antenna, but it<br />
is not clear how much it helps. These systems have security built in and<br />
potentially can stream video if the range is long enough. Like hotspots,<br />
writing software for them would also be easy.<br />
<br />
What do you guys think?<br />
<br />
Thanks,<br />
Charlie<br />
_______________________________________________<br />
Triangle, NC Embedded Computing mailing list<br />
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<br /></blockquote>
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