Charles, 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.
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. It uses the same Low Power Labs RMS69W radios at 915MHz. Hope this helps. Chip Chip McClelland [email protected] (919) 624-5562 On Oct 25, 2018, 3:43 PM -0400, [email protected], wrote: > Send TriEmbed mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of TriEmbed digest..." > > > Today's Topics: > > 1. Re: Coffee roaster (Shane Trent) > 2. Long range digital communication (long range wifi, XBee?) > (Charles West) > 3. Re: Long range digital communication (long range wifi, XBee?) > (Glen Smith) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 25 Oct 2018 14:32:25 -0400 > From: Shane Trent <[email protected]> > To: TriEmbed Discussion <[email protected]> > Subject: Re: [TriEmbed] Coffee roaster > Message-ID: > <caafjd3rax35xcbvjtf8uvf6ayrirczsauvputhhhx4kqzu+...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Craig, > > A hot air roast should take much less than 30 minutes. It was cool this > morning and I roasted two batches, both to medium City Roast (just past the > end of the first crack), and each was less than 6 minutes. I am using a > vintage unit but have had similar performance from other devices. It sounds > like your old air-popper may have had a temperature limit that kept it from > getting hot enough. I did have one popper model that I had to hack into and > bypass the low-temperature thermostat (but it still seemed to roast slow > and did not last as long a unmodified units). In an air popper the roast > should happen so quickly that it is easy to keep an eye on it. > > I put some notes about my current roasting/cooling setup into a blog post. > My controls over the roaster are adjusting the recirculation of heat to > increase the temperature of the air going into the popper and controlling > the ventilation with a bilge blower. I think the photos show most of the > details. I hope it makes sense. Ping me if you have any questions. > > http://fettricks.blogspot.com/2018/10/roasting-coffee-with-hot-air-poppcorn.html > > Shane > > > On Wed, Oct 24, 2018 at 7:53 PM Craig Cook via TriEmbed < > [email protected]> wrote: > > > I have been using this > > https://smile.amazon.com/gp/product/B00XK3ALS0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 > > for the last 8 years roasting green beans. > > > > That has the side vents, takes ~30 mins to roast. Works *really* well. I > > burned the motor out 2 weeks ago. It's discontinued. Thought I should > > migrate to an arduino based version, hence my questions and asking for > > advice on what parts I should purchase. > > > > Yes, after the roast I dump the beans into a cooling basket. > > > > I have one of these to replace it: > > https://www.gopresto.com/product/presto-poplite-hot-air-corn-popper-04820 > > https://smile.amazon.com/gp/product/B00006IUWA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 > > > > Given that new information, would it change the proposed design? > > > > It will be much better if I can control the roasting process though. > > Without control I get a few over roasted beans. > > > > Thanks for everyone's help. > > > > Craig > > _______________________________________________ > > Triangle, NC Embedded Computing mailing list > > > > To post message: [email protected] > > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > > TriEmbed web site: http://TriEmbed.org > > To unsubscribe, click link and send a blank message: mailto: > > [email protected]?subject=unsubscribe > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20181025/a6b5e2e1/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Thu, 25 Oct 2018 15:23:22 -0400 > From: Charles West <[email protected]> > To: TriEmbed <[email protected]> > Subject: [TriEmbed] Long range digital communication (long range wifi, > XBee?) > Message-ID: > <CAGojqSkE6PJ8tj5cL6YY=ppJxDt=wyamkj9cdg-1gi9qga0...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello! > > I'm in Lansdale, PA now but I was hoping I might be able to pick you guy's > brains. My current big project is trying to build one or more robots to > deliver food/drinks on golf courses. I'm currently trying to figure out > the best way to maintain continuous(ish) contact between a access > point/basestation at it's base of operations and 1 or more robots operating > on the course. > > At a minimum, I would like to have the robot report its basic status > (battery percent, GPS position) but it would also be great if it could > stream video when required to allow teleprescence steering or determination > of what is going on. The robot would probably be about 1 km from the base > station at max. > > I'm currently considering 3 possible solutions but I'm pretty open to ideas: > > 1. Use a mobile hotspot/cell modem: > For fixed $130 and monthly $20, I can get a mobile hotspot which > provides one gig of data per month and more data for $5/gig. If I keep the > reporting really light, this could work but the communication would have to > be kept pretty limited. > > 2. XBee: > These modules seem to float somewhere between $25 and $60 in > prices, so a pair would be somewhere in the $50 to $120 range. Sparkfun > had a good guide to XBee (https://www.sparkfun.com/pages/xbee_guide) but > they are listing almost all of their products as retired (besides old > series 1) and most of the stuff I read about XBee is from 2015-2016 so I am > not sure what the best options are anymore. In any case, it looks like it > would provide a low baud rate connection over the desired range. The main > problem is that it requires working through XBee and making my basestation > have to have special software to forward information. I'm also not sure > about security and it is certainly not going to be streaming video. > > 3. Long range Wifi: > Rodney's done some work in this area before with his weather > balloon projects. I don't recall off the top of my head how far he managed > to get but I do remember he had to use higher power than allowed without a > higher grade amateur radio license. That power level would not work for a > commercial operation. There are some companies that are selling solutions > aimed at farms (http://ayrstone.com/www/?v=7516fd43adaa) and there seem to > be off the shelf solutions that can get 500 ft (mostly aimed at hotels). > The hotel systems seem to be in the $350 range and the farm systems in the > $500 or so. The robot could use a high gain antenna, but it is not clear > how much it helps. These systems have security built in and potentially > can stream video if the range is long enough. Like hotspots, writing > software for them would also be easy. > > What do you guys think? > > Thanks, > Charlie > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20181025/34da42b7/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Thu, 25 Oct 2018 14:43:31 -0500 > From: Glen Smith <[email protected]> > To: Charles West <[email protected]> > Cc: TriEmbed <[email protected]> > Subject: Re: [TriEmbed] Long range digital communication (long range > wifi, XBee?) > Message-ID: > <canwtidv803kuwf2hefvodfm54s1bytey0mb3g497okkije-...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Charles, > > I played around with Moteinos https://lowpowerlab.com/guide/moteino/ for a > while and had good luck with the RFM69 radios, I don't remember what > frequency I was using. > > I just recently was listening to an episode > <https://theamphour.com/398-an-interview-with-felix-rusu/> of The Amp Hour > where Chris interviewed the guy who makes these - he is getting very good > range depending on all the usual variables. It might be worth checking them > out. > > Glen > > On Thu, Oct 25, 2018 at 3:23 PM Charles West via TriEmbed < > [email protected]> wrote: > > > Hello! > > > > I'm in Lansdale, PA now but I was hoping I might be able to pick you guy's > > brains. My current big project is trying to build one or more robots to > > deliver food/drinks on golf courses. I'm currently trying to figure out > > the best way to maintain continuous(ish) contact between a access > > point/basestation at it's base of operations and 1 or more robots operating > > on the course. > > > > At a minimum, I would like to have the robot report its basic status > > (battery percent, GPS position) but it would also be great if it could > > stream video when required to allow teleprescence steering or determination > > of what is going on. The robot would probably be about 1 km from the base > > station at max. > > > > I'm currently considering 3 possible solutions but I'm pretty open to > > ideas: > > > > 1. Use a mobile hotspot/cell modem: > > For fixed $130 and monthly $20, I can get a mobile hotspot which > > provides one gig of data per month and more data for $5/gig. If I keep the > > reporting really light, this could work but the communication would have to > > be kept pretty limited. > > > > 2. XBee: > > These modules seem to float somewhere between $25 and $60 in > > prices, so a pair would be somewhere in the $50 to $120 range. Sparkfun > > had a good guide to XBee (https://www.sparkfun.com/pages/xbee_guide) but > > they are listing almost all of their products as retired (besides old > > series 1) and most of the stuff I read about XBee is from 2015-2016 so I am > > not sure what the best options are anymore. In any case, it looks like it > > would provide a low baud rate connection over the desired range. The main > > problem is that it requires working through XBee and making my basestation > > have to have special software to forward information. I'm also not sure > > about security and it is certainly not going to be streaming video. > > > > 3. Long range Wifi: > > Rodney's done some work in this area before with his weather > > balloon projects. I don't recall off the top of my head how far he managed > > to get but I do remember he had to use higher power than allowed without a > > higher grade amateur radio license. That power level would not work for a > > commercial operation. There are some companies that are selling solutions > > aimed at farms (http://ayrstone.com/www/?v=7516fd43adaa) and there seem > > to be off the shelf solutions that can get 500 ft (mostly aimed at > > hotels). The hotel systems seem to be in the $350 range and the farm > > systems in the $500 or so. The robot could use a high gain antenna, but it > > is not clear how much it helps. These systems have security built in and > > potentially can stream video if the range is long enough. Like hotspots, > > writing software for them would also be easy. > > > > What do you guys think? > > > > Thanks, > > Charlie > > _______________________________________________ > > Triangle, NC Embedded Computing mailing list > > > > To post message: [email protected] > > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > > TriEmbed web site: http://TriEmbed.org > > To unsubscribe, click link and send a blank message: mailto: > > [email protected]?subject=unsubscribe > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20181025/5cdcb337/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > TriEmbed mailing list > [email protected] > http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > > > ------------------------------ > > End of TriEmbed Digest, Vol 65, Issue 11 > ****************************************
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