On Sun, Aug 25, 2013 at 6:20 PM, He Dajiang (I2R) <[email protected]>wrote:
> Hi Eric,
>
> I wanted to say what you said, just forgot to add:
> "however one could embed the value in a packet being transmitted so the
> receiver could see it."
>
> Correct me i I am wrong: the following metadata header is never
> transmitted over the radio. It is only passed between different modules
> within a mote.
>
no need to correct. that is why it is called metadata. it is additional
data that is passed around associated with the packet
>
> typedef nx_struct cc2420_metadata_t {
> nx_uint8_t rssi;
> nx_uint8_t lqi;
> nx_uint8_t tx_power;
>
> ________________________________________
> From: Eric Decker [[email protected]]
> Sent: Monday, 26 August, 2013 7:48:00 AM
> To: He Dajiang (I2R)
> Subject: Re: [Tinyos-help] Tinyos-help Digest, Vol 124, Issue 21
>
> On Sun, Aug 25, 2013 at 4:36 AM, He Dajiang (I2R) <[email protected]
> <mailto:[email protected]>> wrote:
> It looks to me the receiver side has no way to know the tx power of the
> sender.
>
> not sure what you are basng your assertion on.
>
> the value of transmit power on the sender side (a number) isn't terribly
> useful on the receiver side.
>
> however one could embed the value in a packet being transmitted so the
> receiver could see it.
>
> the receiver does have available to it ( for the cc2420 and cc2520 chips)
> the value of rssi. received strength status indicator.
>
>
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> 1. Problem in setting transmit power for cc2420 (Sarra Sarah)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sat, 24 Aug 2013 18:54:32 +0100
> From: Sarra Sarah <[email protected]<mailto:[email protected]>>
> Subject: [Tinyos-help] Problem in setting transmit power for cc2420
> To: tinyos-help <[email protected]<mailto:
> [email protected]>>
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> caos7pshnlu+zpp6mlo8ny5g+vwotxnzlwewryomdbwda38e...@mail.gmail.com<mailto:
> caos7pshnlu%2bzpp6mlo8ny5g%[email protected]>>
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>
> I want to set transmit power for cc2420, so i did that:
>
> I added this line on make file: CFLAGS +="-DCC2420_DEF_RFPWER=1"
> and then i wanted to read transmit power in receiving the packet i used
> call CC2420Packet.getPower(msg), but transmit power is 0x00. i dont know
> where is the problem.
>
> Thank you for help !!
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