Hello everyone,
I configured my telosb mote to periodically output some strings using
printf() / printfflush(), and the strings are captured from serial
port using "java net.tinyos.tools.PrintfClient".
However I noticed after a certain period of time, typically a couple
of days, the mote stops gi
Hello everyone,
The cc2420 data sheet states its RSSI accuracy is -6 to +6 dBm. Does the
range represent, e.g. the 95% confidence interval obtained during hardware
test, or the standard deviation? I am really interested in finding out what
it really represents.
Thanks very much and any input woul
uite simple. RSSI is measuring power, it does not matter quite much
>> whether it comes from noise, interference or useful signal.
>> That is the reason because there is another quality indicator which measures
>> signal to noise ratio.
>> Cheers!
>> Sergio
>>
>> On
Hello everyone,
I always thought the RSSI value read from received packets would fall
as the interference grows. However I just found that the reading
actually rises when I switch on a commercial interference generator..
Would anyone point out why this is happening? Thanks very much.
Regards,
P
Hi everyone,
A quick question: are the bitwise operators in tinyOS the same with
the c ones? e.g. & for bitwise AND and ~for NOT.
Thanks a lot.
Regards,
Peng
___
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berke
Hi everyone,
The datasheet has that the RSSI value should become valid when
"receiver has been enabled for at least 8 symbol periods". And the
CC2420Power.rxOn() seems to be the command that does the job. My
questions is that, if what I said afore was correct, whether calling
CC2420Power.rxOn() i
sh bounds in the performance. But I do not know
> whether this is what you have in mind...
> Cheers!
> Sergio
> On Tue, May 31, 2011 at 8:14 PM, Peng Du wrote:
>>
>> Hello everyone,
>>
>> I have been wondering the significance of the noise floor (in this
>>
Hello everyone,
I have been wondering the significance of the noise floor (in this
context, the RSSI value read from the register when no communication
is underway). Does it in some way reflect the likelihood that packets
sent in certain channel will be successfully received (The Packet
Delivery R
Hello everyone,
I have observed a weird thing:
In one module I use CC2420Config interface of a CC2404ControlC
component. However an event of the interface in my module is triggered
by another module that is using its own instance of the
CC2404ControlC.
I am confused about why that is happening.
Hi everyone,
I have a stack under TOSROOT/apps/ , which has its own version of
components such as CC2420Config. But I would also like to use some
functions of the original version of CC2420Config. How can I do that?
I tried adding the "CFLAGS += -I
$(TOSROOT)/tos/chips/cc2420/interfaces" in the Ma
Hello.
The datasheet of cc2420 states the sensitivity threshold is -94dBm. But when
doing noise floor listening (for example the RssiToSerial application under
apps/test/cc2420) the reading is usually around -110. So are these readings
valid?
Many thanks.
Regards,
Peng
_
Dear all,
I am curious about how frequent the RSSI register is read in
the /apps/tests/cc2420/RssiToSerial. I can see from the code that the
sampling cycle is controlled using the number of readings rather than the
period. So probably there won't be an accurate frequency/ sampling rate.
However, i
Hello everyone.
I have a rather general question: How the quality of a channel can be
assessed (in the context of tinyos, probably RSSI)?
Best regards,
Peng
___
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berkele
Hi there.
I know the sensitivity threshold for CC2420 is -94dbm, but am wondering if
there is a reasonable "threshold value" so that when RSSI reaches it, the
channel is considered not a suitable for carrying out a communication?
Many thanks.
Best regards,
Peng
_
it straight away in ur main configuration file, and adding some
> clear comments would do it, too.
>
>
>
>
> On Wed, Aug 4, 2010 at 1:05 PM, Peng Du wrote:
>
>> Thanks very much for your reply.
>>
>> I am curious that why it is necessary to create m
Hello,
According to the datasheet of CC2420 the RSSI value is stored
in RSSI.RSSI_VAL register, which has the address of 0x13. I am wondering if
there is anyway that I can read the register directly at anytime without
using CC2420Packet.getRssi(), which is on a per-packet basis?
Thanks very much.
Hi.
Is the RSSI value in RSSI.RSSI_VAL register only updated when a message is
received?
Many thanks.
___
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
es {
> interface CollectionId[uint8_t client];
>
>
> }
> }
>
>
>
> 2010/7/27 Peng Du
>
> Thank you all very much.
>>
>> To Zied: did you mean using AMSnooperC?
>>
>> To Obaid: Is there any kind of standard interfaces to identify the
ets.
> ActiveMessage layer uses this component for receiving packets may filter
> messages.
> This low component (low = sit very close to the radio) can hear all the
> packets, packets targeted for other nodes, broadcast messages etc.
>
> On Tue, Jul 27, 2010 at 3:23 PM, Peng Du wrote
Hello everyone,
Is there anyway to let a sensor overhear nearby communications so that it
can estimate the crowdedness of the channel?
Many thanks!
Peng
___
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berkeley.ed
Hello.
Is there anyway to detect the energy level (and probably the level of
utilisation) in a certain channel without reading the RSSI values from the
packets exchange?
Thanks a lot.
Peng
___
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.ed
side of things. I had to modify TOSBase to pass
> send acks back to the PC to get enough information to make
> it work.
>
> It would probably be easier for you to reinvent the wheel,
> than to try to understand what I did...but there it is...
>
> MS
>
>
> Peng Du wrote:
Hi everyone.
My BaseStation periodically sends some info to 3 motes. It then waits for
ACKs to carry on further operations. The problem is how I can ensure that
the initial info and ACKs are not lost due to collision or whatever problem
there could be - Sometimes the motes do get the info so they
Hello everyone.
As the title says, how is the Rssi reading captured using, for example, the
Rssi Demo application in the tutorial supposed to be interpreted into
meaningful values?
Thanks very much.
Peng
___
Tinyos-help mailing list
Tinyos-help@millenn
Hi.
I would like to let the BaseStation periodically changes its channel and
keep the communication with nearby motes (assuming the number and ID of
these motes are known). How can I use the Dissemination protocol to let the
BaseStation know every other motes are ready to change the channel befor
Spam detection software, running on the system "mail.Millennium.Berkeley.EDU",
has
identified this incoming email as possible spam. The original message
has been attached to this so you can view it (if it isn't spam) or label
similar future email. If you have any questions, see
the administrator
Hello all,
I am looking at the IPBaseStation application.
Since driver under $TOSROOT/support/sdk/c/blip/
driver (specifically serial_tun.c) allows the channel to be changed
dynamically, is there any way that I can inform the motes about change?
P.S. someone suggested that I should write a comp
Hello all,
I am looking at the IPBaseStation application.
Since driver under $TOSROOT/support/sdk/c/blip/driver (specifically
serial_tun.c) allows the channel to be changed dynamically, is there any way
that I can inform the motes about change?
Many thanks.
__
Dear all,
This might sound naive - how to send parameters, say channels, to the motes
that are not plugged to the desktop? Would something like the IPBaseStation
provided with tinyOS do the job?
Many thanks!
___
Tinyos-help mailing list
Tinyos-help@mill
29 matches
Mail list logo
