On Sun, Oct 21, 2012 at 1:02 AM, <[email protected]> wrote: > Dear all. > > According data sheet, Z1 or TelosB employs CC2420 (2.4 GHz). > > In most part of articles explains that this transceiver could reach a > distance of 230 m. > > After modeling an hypothetic case in the software called Radio Mobile > using antennas gain of 10 dBi, and setting the receiving sensitivity at > -90 dBm, and the Tx power with 0 dBm, it seems that can reach a distance > of 350 m. with a Rx relative of 12.3 dB. > > In this sense someone ever did an real deployment, evaluating the maximum > distance with an antenna different to 5 dBi. (with more gain) with a high > throughput 70% up to 100%? > > Using 5dBi antennas + Z1 mote I reached +230 mts with LOS with a RSSI close to -90dBm, at approximately 1.70mts high both sender/receiver, so you can expect more distance using a more powerful antenna and with motes in higher locations. Real deployment is a vague reference, as city deployments are far different than rural deployments for example, and depending on your scenario conditions may vary, for example placing nodes in street lights (+14 mts high) with a 5dBi antenna on top of a metro line gave us +30 mts effective coverage, but we had additional obstacles like trees, street signs, parked trucks, etc, as a rule of thumb you have to account 10dB of your link budget for unexpected conditions, like rain, etc. Placement/orientation of the antenna is a factor than can improve your scenario too.
Asking for both telosb and z1 motes is a clever way to get more answers ;) but the truth is the RF impedance matching of the Z1 mote is slightly different from the telosb, haven't tested range on the telosb, but I have seen minor differences, so numbers may vary. Hope it helps, --Antonio Thanks in advance for any answers. > > Regards, > > Alejandro. > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- -- Antonio Liñan Colina R+D+I Engineer @: [email protected] @: [email protected] ------------------------------ Advancare T: +34 93 582 02 70 http://www.advancare.com http://www.zolertia.com http://zolertia.sourceforge.net http://webshop.zolertia.com
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