433MHz to LAN gateway or miniserver?
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From: Joerg on 2 Apr 2010 19:05 markp wrote: > "Joerg" <invalid(a)invalid.invalid> wrote in message > news:81n9h8Fn2pU1(a)mid.individual.net... >> markp wrote: >>> "Joerg" <invalid(a)invalid.invalid> wrote in message >>> news:81mnm5FdqpU2(a)mid.individual.net... >>>> Frank Buss wrote: >>>>> Joerg wrote: >>>>> >>>>>> Frank Buss wrote: >>>>>>> says there is an implementation which needs a 32 bit microcontroller >>>>>>> with >>>>>>> 192 kB ROM and 96 kB RAM. Looks like the IEEE 802.15.4, which is the >>>>>>> base >>>>>>> standard for it, is not easy to implement. Same if you would use >>>>>>> something >>>>>>> like Bluetooth-Piconet. >>>>>>> >>>>>> Yikes. That sounds like Windows or MS-Office where you need at least a >>>>>> gigabyte of RAM to write "Hello World". >>>>> No, just 96 kB RAM :-) But you are right, maybe too much for low cost >>>>> mass >>>>> production. >>>>> >>>> This time it doesn't have to be super low cost. But at the same time it >>>> shouldn't be over-engineered. This easily happens when standards >>>> committees get together. What's the old saying? Too many cooks spoil the >>>> broth. >>>> >>>> >>>>>> It's strange, everyone is talking about ambient assisted living but >>>>>> it's all just PowerPoint jockeying and talk, no real action. >>>>> LoWPAN doesn't sound bad and maybe is better, if you have multiple >>>>> devices >>>>> from different vendors, but unversal multi layer protocols are >>>>> complicated >>>>> and devices are more expensive. >>>>> >>>> Well, if there were off-the-shelf units at reasonable cost I wouldn't >>>> care whether there is a 32bit ARM in there of some lowly 8051. >>>> >>>> -- >>>> Regards, Joerg >>>> >>>> http://www.analogconsultants.com/ >>>> >>>> "gmail" domain blocked because of excessive spam. >>>> Use another domain or send PM. >>> Note the Jennic modules are 32bit with lots of resources: >>> http://www.jennic.com/products/modules/ >>> >>> These are very nice modules.Retail for about $16 in volume. Unfortunately >>> not available for 433MHz only 2.4GHz. >>> >> >> Yeah, I looked at their site :-( >> >> The other thing that I couldn't find is a LAN link. That's missing in many >> systems that are targeted at the home health market. Which I'll never >> understand because there are more and more people who don't have a phone >> line anymore but they do have broadband Internet access. One of them in >> this neighborhood is in her 90's. >> >> -- >> Regards, Joerg > > Pity that they don't do 433MHz. The beauty of the Jennic module is that the > 32 bit processor has a lot of resources and they provide you with a full IDE > based on CodeBlocks to put your own application in the module itself, in > many cases you don't need anything else. BTW the 6LowPAN dev kit does come > with an LAN board, so the schematics of that are going to be available for > you to embed: > http://www.jennic.com/products/development_kits/jn5139_6lowpan_evaluation_kit > > If you could cope with high powered 2.4GHz that might get you the range you > want but might also restrict the markets you could sell in, Jennic also do > high powered versions of those modules. > High-power 2.45GHz can cause serious market restrictions overseas. Also, ideally we don't want to piece it all together ourselves. The product line Martin pointed out seems to have the potential for a real plug-and-play situation: http://www.pointsix.com/support/documents/PManager.pdf Ok, no 433MHz transceiver but with our qties they might be willing to give us that. If their RS232 RF transceiver can talk to this little server they've got then we'd almost be home, because then we could simply plug our RS232 lines from the uC in there and be done. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joel Koltner on 2 Apr 2010 19:34 "Joerg" <invalid(a)invalid.invalid> wrote in message news:81n9h8Fn2pU1(a)mid.individual.net... > The other thing that I couldn't find is a LAN link. That's missing in many > systems that are targeted at the home health market. Which I'll never > understand because there are more and more people who don't have a phone > line anymore but they do have broadband Internet access. I think it's mainly an installation problem (or at least the perception of one) -- the average customer can properly plug in a phone, but while in many instances you'll have, e.g., a router running a DHCP server so it really is "plug and play" for a home health widget, when it *doesn't* work troubleshooting is not something grandma can usually do successfully. Plus companies like Life Alert ("Help, I've fallen and I can't get up!" -- you know those guys charge something like $40/mo for their system? Sheesh!) never exactly struck me as being all that technology-savvy anyway. But heck, you've identified a real market need here -- given time, someone will surely step in to fill it.
From: Joerg on 2 Apr 2010 20:07 Joel Koltner wrote: > "Joerg" <invalid(a)invalid.invalid> wrote in message > news:81n9h8Fn2pU1(a)mid.individual.net... >> The other thing that I couldn't find is a LAN link. That's missing in >> many systems that are targeted at the home health market. Which I'll >> never understand because there are more and more people who don't have >> a phone line anymore but they do have broadband Internet access. > > I think it's mainly an installation problem (or at least the perception > of one) -- the average customer can properly plug in a phone, but while > in many instances you'll have, e.g., a router running a DHCP server so > it really is "plug and play" for a home health widget, when it *doesn't* > work troubleshooting is not something grandma can usually do successfully. > True. However, I know a lot of people who have no land line since years. Including people who must go to the front porch in order to be able to see if someone left a message on the cell. But all of them have a cable modem. > Plus companies like Life Alert ("Help, I've fallen and I can't get up!" > -- you know those guys charge something like $40/mo for their system? > Sheesh!) never exactly struck me as being all that technology-savvy anyway. > Well, but for that money they have to have a minimum staffing level and they also call in regularly. "Hey, how'ya doing today?" I bet that alone has resulted in ambulance calls before it was too late. > But heck, you've identified a real market need here -- given time, > someone will surely step in to fill it. > I doubt it. Look at the home automation market. Most companies there are IMHO sound asleep. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Jan Panteltje on 3 Apr 2010 07:27 On a sunny day (Fri, 02 Apr 2010 15:30:54 -0700) it happened Joerg <invalid(a)invalid.invalid> wrote in <81n9h8Fn2pU1(a)mid.individual.net>: >The other thing that I couldn't find is a LAN link. That's missing in >many systems that are targeted at the home health market. Which I'll >never understand because there are more and more people who don't have a >phone line anymore but they do have broadband Internet access. One of >them in this neighborhood is in her 90's. A while ago I added some I/O to my Linksys WAP: http://panteltje.com/panteltje/wap54g/io.html http://panteltje.com/panteltje/pic/io_pic/index.html So I have it all, wireless, LAN RJ45, analog I/O, digital I/O, controlled from anywhere, webserver too on SDcard, the works. Couple of dollars only. Oh, and it has a buld in temp controller with night and day setpoints. remote monitoring of anything you want. Oh, and the WAP runs Linux. The whole thing is for sure < 100$ i none of quantities. Ahead again.
From: krw on 3 Apr 2010 12:20
On Fri, 02 Apr 2010 12:51:27 -0700, Joerg <invalid(a)invalid.invalid> wrote: >Joel Koltner wrote: >> "Joerg" <invalid(a)invalid.invalid> wrote in message >> news:81mo9mFj1nU1(a)mid.individual.net... >>> Until they have to trudge through the paperwork of EMC cert themselves >>> for the first time and a check for a princely sum is plopped onto the >>> table at the compliance lab. >> >> Hmm... so I might guess that something like this: >> http://www.elcomresearch.com/shop/item.aspx?itemid=11 ... is operating >> in a legal gray zone, at least in the U.S. (they're in Greece)? ... > > >Not necessarily. If you use a pre-certed module with its native antenna >and just place that pre-certed stuff inside a plastic shroud you can be ok. If you've added no function to the box, perhaps. Add any function and you have to certify again, often on a country by country basis (particularly in Asia). >> ... They're >> using off-the-shelf GPS and Bluetooth modules in there, but I'm almost >> 100% certain (from e-mails with the main designer) that they didn't go >> through a formal certification process... >> > >Maybe they are just a re-packager when it comes to hardware. Or they're skirting the law. In the US they're unlikely to get into hot water unless someone turns them in (often a competitor). |