433MHz to LAN gateway or miniserver?
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From: Joerg on 1 Apr 2010 22:23 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.
From: Martin Riddle on 1 Apr 2010 23:05 "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 Cheers
From: Jan Panteltje on 2 Apr 2010 07:41 On a sunny day (Thu, 1 Apr 2010 23:05:06 -0400) it happened "Martin Riddle" <martin_rid(a)verizon.net> wrote in <hp3mt8$3tm$1(a)news.eternal-september.org>: > > >"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 > >Cheers It is easy to make, a PIC 18F67J60, a 430 MHz module, magnetics, some programming, maybe 10 $ in parts.
From: Frank Buss on 2 Apr 2010 08:39 Joerg wrote: > 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. I would build it with modules. 433 MHz transceiver, 5 euro: http://www.octamex.de/shop/?page=shop/flypage&product_id=1418 Ethernet module, 25 euro: http://www.olimex.com/dev/enc28j60-h.html I thinks this would be sufficient for the LAN port side. The schematic for the ethernet module is free, so maybe you could create a better PCB for mass production with the RF module. For the sensor boards you can use any cheap microcontroller, which has sufficient resources for your sensors and the RF module. And the RF module has already an integrated temperature sensor. The software would be a nice project for a weekend :-) -- Frank Buss, fb(a)frank-buss.de http://www.frank-buss.de, http://www.it4-systems.de
From: markp on 2 Apr 2010 09:05
"Martin Riddle" <martin_rid(a)verizon.net> wrote in message news:hp3mt8$3tm$1(a)news.eternal-september.org... > > > "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 > > Cheers There is a specification used by the likes of Jennic and others called 6LowPAN (http://en.wikipedia.org/wiki/6LoWPAN) which allows IP addressing of radio nodes specifically to allow them to be accessed in ths way. There are also free 6LowPAN stacks on sourcefourge. Jennic certainly do 2.4GHz radio modules with this, and there may well now be some ISM modules with it. The Holy Grail for me thouigh would be a very low power mesh network, such as DigiMesh, using something like 6LowPAN to connect it to a LAN. Mark. |