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Content preview: Hello Alex, Yes, that's right, you just have to subtract 45
and you will get RSSI in dBm (it should be negative number). But it seams
to me you have quite high values. Ive got around -50 dBm even if TmoteSky
nodes stay close to each other. [...]
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--- Begin Message ---
Hello Alex,
Yes, that's right, you just have to subtract 45 and you will get RSSI in dBm
(it should be negative number).
But it seams to me you have quite high values. I’ve got around -50 dBm even if
TmoteSky nodes stay close to each other.
Regards, Alex.
09 мая 2015 г., в 8:07, Alex Cp <[email protected]> написал(а):
> Hi all.
>
> Im trying to convert in dBm the values obtained from the app:
>
> <http://tinyos.stanford.edu/tinyos-wiki/index.php/Rssi_Demo>
>
> In my case appears the next values:
>
> Rssi Message received from node 1: Rssi = 40
> Rssi Message received from node 1: Rssi = 41
> Rssi Message received from node 1: Rssi = 40
> Rssi Message received from node 1: Rssi = 40
> Rssi Message received from node 1: Rssi = 41
>
> Because is very close both motes TelosB (Sending Mote and Rssi Base )
>
> In the TinyOS tutorial appears the next: "...that this app prints only the
> raw RSSI values ..."
>
> On the other hand I have the Data sheet of the RF Transceiver CC2420:
>
> <http://web.stanford.edu/class/cs244e/papers/cc2420.pdf>
>
> But is not clear to me How I can do the conversion from raw RSSI to dBm.
>
>
> I read, someone in the TinyOS mail-list, who wrote that is only necessary
> substract -45:
>
> <https://www.millennium.berkeley.edu/pipermail/tinyos-help/2014-March/058162.html>
>
> But I suppose is not a exact calculation.
>
> I'll be grateful if somebody can generously explain how is the correct way to
> convert raw RSSI values from a TelosB to a dBm.
>
> Thanks in advance.
>
> Alex.
>
>
> Date: Mon, 3 Mar 2014 12:13:27 +0530
> From: ashok <[email protected]>
> Subject: [Tinyos-help] RSSI DEMO
> To: [email protected]
> Message-ID:
> <caks3p-d4gxw_djjvc9hwmk-+x_zki+hnvzcr+c2ts2nkukg...@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Dear All,
>
> I am getting RSSI value in tinyos like:
>
> Rssi Message received from node 1: Rssi = -14
> Rssi Message received from node 1: Rssi = -1
> Rssi Message received from node 1: Rssi = 2
> Rssi Message received from node 1: Rssi = -2
> Rssi Message received from node 1: Rssi = 2
> Rssi Message received from node 1: Rssi = 0
> Rssi Message received from node 1: Rssi = -2
> Rssi Message received from node 1: Rssi = 2
> Rssi Message received from node 1: Rssi = 2
>
> and I want to conform that is this value is in Dbm?
>
> if not than how can i convert it?
>
> regards,
>
> -ashok
> _______________________________________________
> Tinyos-help mailing list
> [email protected]
> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
--- End Message ---
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