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
