Hi John, RF212 has been successfully used by Branislav Kusy in Australia for cattle tagging and tracking. As far as I know, it was a dual radio setup (RF230 and RF212), but you can get RF212 working together with RFA1 too. They reported around 2 km range. You should search research papers from CSIRO and cattle tracking.
Best, Miklos On Mon, Oct 1, 2012 at 7:44 AM, András Bíró <[email protected]> wrote: > Hi John, > > There's no gcc support for 8051, and - as far as I know - that's a > dealbreaker with nesc/tinyos. > > However, we're using Atmel's AT86RF212, and it's quite stable (We > fixed some bugs in it in the last half year, with the help of Miklos > Maroti). Unfortunatly, we're in Europe, so we can only use it on the > 868MHz band, with reduced power, but it's still better in some places > then 2.4GHz. The rf212 is much more integrated then the CC1000 family, > it does almost anything for 802.15.4 MAC. > > We're also experimenting with Silab's SI4432 radio, which is a low > level radio, like the CC1000, but the driver is not quite ready yet > (you can find it at https://github.com/mmaroti/tinyos/tree/si443x), > but we're going to work a lot with it soon, so it will probably work > in one-two months. We're also planning to replace it with si446x, but > I don't know when. > > Both of these radios are using the rfxlink stack. > > Antennas: > We're using this chip for on-board antennas: > http://hu.farnell.com/johanson-technology/0868at43a0020e/antenna-ceramic-868mhz/dp/1885493 > Or if we need external antenna, we're usually using standard European > GSM (900/1800/2100MHz) antennas. > We prefer omnipolar antennas, so we don't know anything about dipoles > > > Andras Biro > > Unicomp Ltd. > ucmote.unicomp.hu > > > On Sun, Sep 30, 2012 at 10:44 PM, John Griessen <[email protected]> wrote: >> I'm going to be making some tinyos nodes for field biologists using >> the old telosb design slightly modified, but after that batch, >> I'd like to make something better for frequencies like the CC1101 >> transceivers use: >> 315, 433, 868, and 915 MHz. A few years ago David Moss emailed this list >> often with >> talk about using those frequencies, but I don't see him talking lately, is >> anyone else using >> 433 or 915 MHz bands for tinyos? I'd like to know if so. I'm wondering how >> difficult the testing >> and all for a folded dipole for 433 or 915 MHz is and what is out there >> already. >> >> In reading about antennas, I like the folded dipole as used on CC2500 >> reference designs since >> it is matched to the transceiver output impedance so you don't need a balun >> circuit and have >> fewer parts and inherent good coupling to the antenna for true low power. >> So, another question >> I have is, "Is there an open platform based on the cc2500, and if so, it >> probably uses a MSP430 >> for the tinyos code rather than the internal 8051 MCU of the CC2500, and if >> so, which one? >> >> The msp430f5438A platform mm5t, (https://github.com/MamMark/mm.git), >> mentions using >> the CC2420, which costs 2X as much as a CC2500, and doesn't have a folded >> dipole ref design, >> so not as desirable... >> >> >> John Griessen >> -- >> Ecosensory >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
