Take RSSI values of the received signals. Use triangulation method. If
you google it you can reach lots of material.
Firat TARAKTAS
ElectricalElectronics Engineer
Reseracher
GENETLAB INFORMATION TECHNOLOGIES
Kayisdagi Caddesi Kar Plaza D Blok Kat:3 34752
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Phone:
Hello!
I'm using the micaz to Tinyos 1.1.15 version.
In cc2420data sheet, the default value of CCA_THR is -35.
From: roberto pagliari [mailto:[EMAIL PROTECTED]
Sent: Monday, July 02, 2007 11:56 PM
To: JeongKwanhee
Cc: tinyos-help@millennium.berkeley.edu
Subject: Re: [Tinyos-help] CCA
Hello,
You forgot about -45 offset (is the same as for RSSI).
The reset value for CCA is about -77 dBm.
Regards, Aleksandr.
wbr, Sadkov Aleksandr
[EMAIL PROTECTED]
www.sumkino.com
www.wl.unn.ru
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Unfortunately, I don't know exactly, there is no information about range in
Datasheet.
It's 8 bit value, and I guess it's same range as RSSI value.
Regards, Aleksandr.
wbr, Sadkov Aleksandr
[EMAIL PROTECTED]
www.sumkino.com
www.wl.unn.ru
_
From: JeongKwanhee [mailto:[EMAIL
Also, establish ID-based communication (by sending messages with data
about the sender) and, if you wish to log the values, create a volume
(tinyos-2 tutorial has material on this).
And, yes, use RSSI values.
2007/7/3, Firat TARAKTAS [EMAIL PROTECTED]:
Take RSSI values of the received
hi,
We want to use the UART module in mica2 to receive data from the PC. We
used the hyperterminal to send to the mote but Leds don't toggle when
receiving from serial as we adjust them. Is the problem in the
HyperTerminal? should we use another program? what is the length of data we
should
it is the same of the rssi value, since they are compared in order to detect
other transmissions. By the way, the default value depends on your
filesystem version, and you can modify it by going to HPLCC2420ControlC, for
example (in version 1.1.7 the default value is -128)
On 7/3/07, Aleksandr
I need to know two questions regarding how the cc2420 works
1) why does in cc2420M.nc the call TOSH_READ_RADIO_CCA_PIN() does not wait
for the RSSI_VALID flag?
2) if the radio doesnt transmit for a long time, is the RSSI continuously
updated every 8 periods of symbol and the RSSI_VALID flag is
Hi all,
I would like to retrieve messages from multiple SerialFowarders. For
example, one SerialForwarder is at port 9001, the other SerialForwarder is
at port 9002. I want to write a java application to listen to both ports at
the same time.
I can open separate terminals and listen to each
Hi,
Does anyone know if there is any BMAC implementation with RTS/CTS
available for Micaz platform?
I am interested in collecting the statistics of number of RTS/ CTS
packets transmitted at the MAC layer.
But I am confused about where the MAC layer functions can be found in
Micaz using
On the base of what I understand for the CC2420,
The TOSH_READ_RADIO_CCA_PIN() can be used every time you issue a request to
dispatch a packet, if the pin is active then you can go...
The RSSI value indicates if there is activity in the channel in order to start
receiving a packet.
I need to
Howdy,
Just a minor erratum in Lesson 10: An empty file by the name of 'platform.h'
must exist in the platform directory for an application to compile.
No mention of this is made in the lesson, causing the Null application to
fail.
On the base of what I understand for the CC2420,
The TOSH_READ_RADIO_CCA_PIN() can be used every time you issue a request
to
dispatch a packet, if the pin is active then you can go...
The RSSI value indicates if there is activity in the channel in order to
start
receiving a packet.
1) Turn of HTML in your email. We're loosing formatting, and it's making
things hard to read.
2) Be patient.
3) There are many postings both here and on the plugin forum about your
problems, did you check? Search the plugin forum and this mailing list.
On Tue, June 26, 2007 9:50 am, antonio gonga
All,
Ok, I'm intrigued again... (why does this keep happening??)
Accordint to TEP 111, the message_t is defined by:
typedef nx_struct message_t {
nx_uint8_t header[sizeof(message_header_t)];
nx_uint8_t data[TOSH_DATA_LENGTH];
nx_uint8_t footer[sizeof(message_footer_t)];
nx_uint8_t
look here: http://ieeexplore.ieee.org/iel5/9840/31018/01440974.pdf
or Google for perpetual environmentally powered sensor networks pdf
It's a good primer on what you're looking at.
-Ben
On Tue, June 26, 2007 11:12 am, Steve McKown said:
On Monday 25 June 2007 02:01:09 pm manu suryavansh wrote:
You will probably not be able to send message_t's using Hyperterm
because they contain non-ASCII content. Specifically the CRC
value needs to be calculated per-message. I don't use T2 so
I can't fully comment, but whatever modules that implement the
moral equivalent of GenericComm accept a
Assuming you actually got all the SF's to run on the right ports,
you can use an at the end of the line to put the command
in the background so you can execute more commands while it is
running:some -command -with -args
If you have a bunch of commands in a file, again with the 's
and
Hello;
I'll tell you what I've been told by Steve McKown when asked about something
similar:
quote:
Then you should look at the C SDK @ $TOSROOT/support/sdk/c. It can
handle the the serial protocol for you; you get to read and write serial
active messages and dispense with the framing/ack/crc
On Tuesday 03 July 2007 11:01:48 am Pedro Almeida wrote:
All,
Ok, I'm intrigued again... (why does this keep happening??)
[snip]
From the same TEP, The metadata field of message_t stores data that a
single-hop stack uses or collects does not transmit. This mechanism allows
packet layers
Thank you once again, Steve, you're a tireless help! =)
I guess I found strange the concept of something being included in a message
structure that never gets to be sent...
On 7/3/07, Steve McKown [EMAIL PROTECTED] wrote:
On Tuesday 03 July 2007 11:01:48 am Pedro Almeida wrote:
All,
Ok, I'm
Hi everyone,
I've looked over the mailing lists and as much documentation as I could,
but I can't seem to find out how to access the micaz's ability to
modulate the radio transmit power. I'm using TinyOS 2.0 (latest on the
liveCD), and most of the posts and documents I've seen pertain to 1.x,
MS,
I thought you could do that. I was staring at code all week and my brain had
turned to mush.
-Ben
On Fri, June 29, 2007 1:16 pm, Michael Schippling said:
I think the original problem is this:
RSSI=*((uint8_t *)recv_packet-strength);
which is treating strength as a pointer and
On Fri, June 29, 2007 8:10 pm, SANG Junjun said:
http://webs.cs.berkeley.edu/users/nestfr/nestfr_paper_display.php
--
Best Regards,
SANG JUNJUN
That is coming up blank for me. If I click on the bibtex link, I get code.
It appears there is some kind of scripting error for generating the
The TOSH_READ_RADIO_CCA_PIN() can be used every time you issue a request
to
dispatch a packet, if the pin is active then you can go...
thank you marco, but what do you mean by if the pin is active? CCA_PIN
returns the result of the operation (RSSI CCA), but in order to read the
RSSI, the
All,
Has anyone tried installing apps on MicaZ using MIB520 in TOS2?
I tried installing the Blink app on MicaZ using MIB520 and ran into few
problems. I am using TOS2 and since MIB520 is not defined in the makerule I
am issuing 'MIB510' in the command. I have the ports COM7 and COM8. Also,
the
Hi Roberto,
on the radio manual (page 51 of 90), the description of CCA pin says:
The clear channel assessment signal is based on the measured RSSI value and a
programmable threshold. The clear channel assessment function is used to
implement the CSMA-CA functionality specified in [1]. CCA is
Hyperterminal is meant more for sending ASCII characters. I don't think
it handles binary/hex packets well.
You might want to consider using XServe/XServeTerm (available with
MoteWorks installer) to send commands to the nodes in the network. This
is what MoteView uses to actuate LEDs, adjust data
Steve McKown wrote:
3 - If it's not.. what use does it have?
The metadata is useful for writing network functionality. It's used in CTP
for example, to manage neighbors and routing. I don't think you'd want an
application to use metadata directly, since you're then tying that
Hi,
serialsource.c does not have a maintainer attribution, so I'm posting this
here.
In TinyOS 2.0.x, the C SDK's serialsource.c contains a logic error in
write_serial_packet() that can cause a deadlock. This situation occurs when
write_serial_packet() is called by the host and the attached
If by that you mean casting something to be a pointer: (uint8_t *)
and then dereferencing it: RSSI = *(pointer)
Sure you can do it...on most real computers you'll usually get
a BUSERR or SEGFAULT, but sometimes you'll get lucky...on our
u-controllers it'll probably just generate junk unless it
yes, I read it, but within the tinyos code (1.0.7, for instance,
CC2420RadioM.nc) there is something like
void tryToSend() {
uint8_t currentstate;
atomic currentstate = stateRadio;
// and the CCA check is good
if (currentstate == PRE_TX_STATE) {
if
I would like to find any TinyOS-2.0 example code for the telosb to help me
make a platform variant based on it. For instance, I see in
/tinyos-2.x/tos/chips/sht11
generic module SensirionSht11LogicP() and other interfaces built on top
of it, but no
example turns up for telosb. Know anywhere
On Tuesday 03 July 2007 11:47:35 am Pedro Almeida wrote:
Thank you once again, Steve, you're a tireless help! =)
I guess I found strange the concept of something being included in a
message structure that never gets to be sent...
Yeah, you have to think of message_t as a subset of the actual
On Jul 3, 2007, at 2:10 PM, John Griessen wrote:
Steve McKown wrote:
3 - If it's not.. what use does it have?
The metadata is useful for writing network functionality. It's
used in CTP for example, to manage neighbors and routing. I don't
think you'd want an application to use
On Tuesday 03 July 2007 05:12:18 pm John Griessen wrote:
I would like to find any TinyOS-2.0 example code for the telosb to help me
make a platform variant based on it. For instance, I see in
/tinyos-2.x/tos/chips/sht11
generic module SensirionSht11LogicP() and other interfaces built on top
You don't need to check RSSI_VALID because you do not retreive the RSSI value.
The chip would handle the validity of RSSI and inform you whether the CCA check
is passed. The CCA check would return bad if the receiver has not yet been
enabled 8 symbol period.
-Han
- Original Message -
Hello John,
File BaseStationP.nc
file BaseStationC.nc
configuration BaseStationC {
}
implementation {
..
// For sensing
components new SensirionSht11C() as SensorSht;
I wanted to follow this down to the details of
SensirionSht11C()
I looked in
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