433MHz to LAN gateway or miniserver?
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From: markp on 2 Apr 2010 18:28 "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. Mark.
From: Joerg on 2 Apr 2010 18:30 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 http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Martin Riddle on 2 Apr 2010 18:32 "Joerg" <invalid(a)invalid.invalid> wrote in message news:81mdtoFha9U2(a)mid.individual.net... > Martin Riddle wrote: >> "Joerg" <invalid(a)invalid.invalid> wrote in message >> news:81l2psFdnbU1(a)mid.individual.net... >>> Is there a cheap (as in mass produced and <$100) pod that plugs into >>> a LAN port of a regular router and have a, say, 433MHz radio link? >>> Something that could then connect to several thermometers or weather >>> stations and ask for their readings. >>> >>> It would have to be accessible from the web by a remote server for >>> polling purposes. Maybe it could just be a mini webserver in itself >>> that gets polled. 2.45GHz often wouldn't work all that well because >>> of range. >>> >>> -- >>> Regards, Joerg >>> >>> http://www.analogconsultants.com/ >>> >>> "gmail" domain blocked because of excessive spam. >>> Use another domain or send PM. >> >> A weather base station with a serial port and this >> <http://www.lantronix.com/device-networking/external-device-servers/uds1100.html> >> >> Over $100 >> > > For just the port? That would be too much, and we'd still need a radio > module. Ideal would be one that has the radio part in the box. > > -- > Regards, Joerg I know this is what your looking for, but I have no idea about the price. <http://www.pointsix.com/cgi-bin/PointSix.cgi?PManager> Cheers
From: Joerg on 2 Apr 2010 18:40 Martin Riddle wrote: > "Joerg" <invalid(a)invalid.invalid> wrote in message > news:81mdtoFha9U2(a)mid.individual.net... >> Martin Riddle wrote: >>> "Joerg" <invalid(a)invalid.invalid> wrote in message >>> news:81l2psFdnbU1(a)mid.individual.net... >>>> Is there a cheap (as in mass produced and <$100) pod that plugs into >>>> a LAN port of a regular router and have a, say, 433MHz radio link? >>>> Something that could then connect to several thermometers or weather >>>> stations and ask for their readings. >>>> >>>> It would have to be accessible from the web by a remote server for >>>> polling purposes. Maybe it could just be a mini webserver in itself >>>> that gets polled. 2.45GHz often wouldn't work all that well because >>>> of range. >>>> >>>> -- >>>> Regards, Joerg >>>> >>>> http://www.analogconsultants.com/ >>>> >>>> "gmail" domain blocked because of excessive spam. >>>> Use another domain or send PM. >>> A weather base station with a serial port and this >>> <http://www.lantronix.com/device-networking/external-device-servers/uds1100.html> >>> >>> Over $100 >>> >> For just the port? That would be too much, and we'd still need a radio >> module. Ideal would be one that has the radio part in the box. >> >> -- >> Regards, Joerg > > I know this is what your looking for, but I have no idea about the > price. > <http://www.pointsix.com/cgi-bin/PointSix.cgi?PManager> > Aha, thanks! They only offer a transceiver for 900MHz, not 433MHz so we'll have some problems internationally but it can't hurt to talk to the guys about it. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: markp on 2 Apr 2010 18:56
"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. Mark. |