Development of a cheap wireless sensor node
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From: arslan on 16 Apr 2008 07:50 I want to develop a cheap wireless sensor node with short range (500ft). I am a novice in the field of wireless, therfore i dont want to work on designing an antenna. I am looking for small and cheap full/half duplex modules with low datarate to attach to my digital circuit. Are any such modules available
From: Anahata on 16 Apr 2008 08:31 arslan wrote: > I want to develop a cheap wireless sensor node with short range (500ft). > I am a novice in the field of wireless, therfore i dont want to work on > designing an antenna. > I am looking for small and cheap full/half duplex modules with low > datarate to attach to my digital circuit. > Are any such modules available Google for radio modem. Anahata
From: larwe on 16 Apr 2008 08:33 On Apr 16, 7:50 am, "arslan" <arsl_kha...(a)yahoo.com> wrote: > I want to develop a cheap wireless sensor node with short range (500ft). What is "cheap"? It will be difficult to reach anything approaching "mass production cheap" if you are buying a preconstructed module. Note that there are plenty of off-the-shelf chip antennas; designing the antenna really isn't the hard part, building and tuning the rest of the circuit (and getting type approval) is the hard part. What country are you in? The available frequencies/modules are different in different locales. Probably the simplest choice is something in the 2.4GHz ISM band. A product like this is in your general ballpark <http:// www.sparkfun.com/commerce/product_info.php?products_id=151> and should give you an idea of the price to expect.
From: arslan on 18 Apr 2008 06:59 >On Apr 16, 7:50=A0am, "arslan" <arsl_kha...(a)yahoo.com> wrote: >> I want to develop a cheap wireless sensor node with short range (500ft). > >What is "cheap"? It will be difficult to reach anything approaching >"mass production cheap" if you are buying a preconstructed module. >Note that there are plenty of off-the-shelf chip antennas; designing >the antenna really isn't the hard part, building and tuning the rest >of the circuit (and getting type approval) is the hard part. > >What country are you in? The available frequencies/modules are >different in different locales. Probably the simplest choice is >something in the 2.4GHz ISM band. > >A product like this is in your general ballpark <http:// >www.sparkfun.com/commerce/product_info.php?products_id=3D151> and should >give you an idea of the price to expect. > > The replies were very helpful The problem is that the modules that i have seen are very costly (ie 12~15$) Now does anybody know about any complete RF links available in 5$ range. There should be something i could find from manufacturers in china or Taiwan
From: donald on 18 Apr 2008 09:13
arslan wrote: >> On Apr 16, 7:50=A0am, "arslan" <arsl_kha...(a)yahoo.com> wrote: >>> I want to develop a cheap wireless sensor node with short range > (500ft). >> What is "cheap"? It will be difficult to reach anything approaching >> "mass production cheap" if you are buying a preconstructed module. >> Note that there are plenty of off-the-shelf chip antennas; designing >> the antenna really isn't the hard part, building and tuning the rest >> of the circuit (and getting type approval) is the hard part. >> >> What country are you in? The available frequencies/modules are >> different in different locales. Probably the simplest choice is >> something in the 2.4GHz ISM band. >> >> A product like this is in your general ballpark <http:// >> www.sparkfun.com/commerce/product_info.php?products_id=3D151> and should >> give you an idea of the price to expect. >> >> > > The replies were very helpful > The problem is that the modules that i have seen are very costly (ie > 12~15$) Now does anybody know about any complete RF links available in 5$ > range. Short range for $5 is 10 feet. Unless you don't care for FCC approved devices. > There should be something i could find from manufacturers in china or > Taiwan |