[Tinyos-help] the value of packet-crc
Hi, I use TOSSIM as the simulator and notice some packets cant be correctly received because of the packet-crc = 0, which means crc check fails, while most other packets can be received well. I wonder why this happens when I use simple radio model and all motes use the exactly same codes. The tinyos version I use is 1.1.15 and r=simple is used to specify the simple radio model. Is there any possible reason? Thanks ahead. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Re: SOS
For techniqal differences please have a look at http://www.ece.iisc.ernet.in/network_labs/manjunath/commag.pdf Regads, Manjunath On Wed, 30 Aug 2006, Tan Han Chiang wrote: Hi all, did anyone did any comparison between tinyOS and SOS (sensor operating system)?? What is their main difference beside the programming language? Any advantages or disadvantages of one over the other?? is SOS more user friendly due to the language (C instead of nesC)?? Thanks. Institute For Infocomm Research - Disclaimer - This email is confidential and may be privileged. If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] launchall.sh error
Dear all, I am new to Cricket. Now I perform demo according to manual. After cricketd is running, I start the command line launchall.sh. But some errors appear as following. Simulation Mode Exception in thread main java.lang.NoClassDefFoundError: beaconconfig/BeaconCo nfig Exception in thread main java.lang.NoClassDefFoundError: beaconfinder/BeaconFi nderApp Exception in thread main java.lang.NoClassDefFoundError: cricketdaemon/Cricket Daemon Please help me out. Thanks. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
thanks for ur reply michael, if i sample the signal at 1ms(suppose for 50hz signal)then it will be better...that is required for my application ...one more thing is that, the system tht i want to monitor is highly dynamic in nature..so the data should be sendfor every 1ms...i think 1ms is sufficient for just measuring the external ADC value..and sending this value using multihop(must) technique... But the problem is.i am losing lot of packets abt 50% even for the sampling period at 10 msdo u hav any different idea tht ...how can i overcome this problem any help should be highly appreciated... if we cant sample and send(using multihop)the data in 1ms ...pls give the reason... still i did nt clear my old doubts... On 8/30/06, Michael Schippling [EMAIL PROTECTED] wrote: I don't know the message rate you can expect from moteiv motesbut if you are trying to send one sample every 10ms you are probably pretty close to the limit (somewhere on the order of100 msg/sec is the max for micaz's). You'll probably need tocollect multiple samples in one message to get anywhere at 30Hz...Let me know if you need clarification one answers to your other questions. MSsiva prasad wrote: From: *siva prasad* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Date: Aug 28, 2006 12:52 AM Subject: Delta application -help required To: tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu hi all... i am working on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while i tried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz...if i increase the sampling time to 10ms ..i am losing lots of packets... can any body pls help me... thanks siva katru ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
Hy Siva, here is a short description of the Delta application: - StdControl.start() calls the command Timer.start() to start the programm - Every time when Timer.fired() (periodically, all DELTA_TIME ms) the sensor getsthe request ADC.getData() - When the data is ready (ADC.dataReady()), the sendData() task will be posted - sendData() sends the sensor reading and some route information in the message dmsg with SendDeltaMsg.send() - SendDeltaMsg.sendDone() indicates that the message was sent by your mote (it's is not anACK from your destination) and erases it from the queue buffer - SnoopDeltaMsg.intercept()reports an incoming message, which should be forwarded (by the MultiHop module) If you want to know why and which parent / route is selected insendData() you'll have to take a closer look at .../moteiv/tos/lib/MultiHopLQI. Genrerally it is helpfull to compile the apps with maketmote fileset to generate a filest.txt filein .../build/tmote that lists the used components and header including the location of each source file. Also you can create some documentation of an application by using make tmote docs instead, this generates a html-based documentation in .../moteiv/doc/nesdoc. There you can see all the apps, components, interfaces and the wiring. Hope this helps you a bit. OLE - Original Message - From: siva prasad To: tinyos-help@Millennium.Berkeley.EDU Sent: Wednesday, August 30, 2006 5:47 AM Subject: [Tinyos-help] Delta application -help required From: siva prasad [EMAIL PROTECTED]Date: Aug 28, 2006 12:52 AMSubject: Delta application -help required To: tinyos-help@millennium.berkeley.edu hi all... i amworking on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while itried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz... if i increase the samplingtime to 10ms ..i am losing lots of packets... canany bodypls help me... thanks siva katru ___Tinyos-help mailing listTinyos-help@Millennium.Berkeley.EDUhttps://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] tinyviz in tinyos 2.x?
I can't find TinyViz in the source code of tinyos 2.x... it's possible to import tinyviz from tinyos 1.x or it's simply not yet developed? (what can I use in this case?) Thanks for the answer, bye. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
hi ole, i am very thankful to unow, i understand whats going on.. butone thing remindsthat is ---i asked abt sampling at 1ms and sending the data in tht time only...for an external ADC signal of 50 hz(say)using multihop(obvious) technique...the thing is i am losing lots of packets...how can i overcome this problem...? i need help in this area... once again thank u. On 8/30/06, Ole Bischoff [EMAIL PROTECTED] wrote: Hy Siva, here is a short description of the Delta application: - StdControl.start() calls the command Timer.start() to start the programm - Every time when Timer.fired() (periodically, all DELTA_TIME ms) the sensor getsthe request ADC.getData () - When the data is ready (ADC.dataReady()), the sendData() task will be posted - sendData() sends the sensor reading and some route information in the message dmsg with SendDeltaMsg.send () - SendDeltaMsg.sendDone() indicates that the message was sent by your mote (it's is not anACK from your destination) and erases it from the queue buffer - SnoopDeltaMsg.intercept()reports an incoming message, which should be forwarded (by the MultiHop module) If you want to know why and which parent / route is selected insendData() you'll have to take a closer look at .../moteiv/tos/lib/MultiHopLQI. Genrerally it is helpfull to compile the apps with maketmote fileset to generate a filest.txt filein .../build/tmote that lists the used components and header including the location of each source file. Also you can create some documentation of an application by using make tmote docs instead, this generates a html-based documentation in .../moteiv/doc/nesdoc. There you can see all the apps, components, interfaces and the wiring. Hope this helps you a bit. OLE - Original Message - From: siva prasad To: tinyos-help@Millennium.Berkeley.EDU Sent: Wednesday, August 30, 2006 5:47 AM Subject: [Tinyos-help] Delta application -help required From: siva prasad [EMAIL PROTECTED] Date: Aug 28, 2006 12:52 AMSubject: Delta application -help required To: tinyos-help@millennium.berkeley.edu hi all... i amworking on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while itried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz... if i increase the samplingtime to 10ms ..i am losing lots of packets... canany bodypls help me... thanks siva katru ___Tinyos-help mailing listTinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] problem
Hi: I think i have get a problem with this.Can you tell me why and how to deal with the matter?Thank you . $ make telosbmkdir -p build/telosb compiling SimpleCmd to a telosb binaryncc -o build/telosb/main.exe -O -Wall -Wshadow -DDEF_TOS_AM_GROUP=0x7d -Wnesc-all -target=telosb -fnesc-cfile=build/telosb/app.c -board= -I%T/lib/Deluge -Wl,--s ection-start=.text=0x4800,--defsym=_reset_vector__=0x4000 -DIDENT_PROGRAM_NAME=\SimpleCmd\ -DIDENT_USER_ID=\demowolf\ -DIDENT_HOSTNAME=\JIANGWEI\ -DIDENT_USER_HASH=0x33b657c2L -DIDENT_UNIX_TIME=0x44f5ae79L -DIDENT_UID_HASH=0x6ffbf88dL -mdisable-hwmul -I/opt/tinyos-1.x/tos/lib/CC2420Radio SimpleCmd.nc -lmC:/PROGRA~1/UCB/cygwin/opt/tinyos-1.x/tos/system/PotC.nc:90: component HPLPotC not foundC:/PROGRA~1/UCB/cygwin/opt/tinyos-1.x/tos/system/PotC.nc:93: no match make: *** [exe0] Error 1 ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] calibrating TMote Sky sensors???
Hello, Are the batteries on both motes supplying at least 2.4V? If it falls below, the readings will be different from what they should be. The SHT11's otherwise are calibrated by Sensirion at the factory, that's why they cost what they do! Simon Davis On Tuesday 29 August 2006 09:55 am, Luis E. Palafox-Maestre wrote: Hi, Is there a way of calibrating the onboard sensors on the TMote? I'm asking this because I keep getting different readings for motes that are next to each other, for instance I consistently get temperature readings that are up two Celsius degrees apart. -- ___ Play 100s of games for FREE! http://games.mail.com/ ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
As I said, based on my (small) experience with micaz I believe that 100 messages per second is about the max you can expect. And that 100 is for the total system, not per mote (unless of course you have only one mote transmitting). If you are doing multihop then you need to divide the total messages by the number of hops (each hop being it's own message) to get even a best case estimate -- ignoring hidden nodes and any other actual practical considerations. So the only way I see to get your higher sample rate is to aggregate samples, say 10 per message. You would need to do some testing in various configurations to see how many messages you can get...let's say, the source and two hops gives you best case 30 msg/sec, with 10 samples/msg, is 300 samples/sec. Nobody said that motes were a High Speed sensor network... MS siva prasad wrote: thanks for ur reply michael, if i sample the signal at 1ms(suppose for 50hz signal) then it will be better ...that is required for my application ...one more thing is that, the system tht i want to monitor is highly dynamic in nature..so the data should be send for every 1ms...i think 1ms is sufficient for just measuring the external ADC value..and sending this value using multihop(must) technique... But the problem is. i am losing lot of packets abt 50% even for the sampling period at 10 msdo u hav any different idea tht ...how can i overcome this problem any help should be highly appreciated... if we cant sample and send(using multihop) the data in 1ms ...pls give the reason... still i did nt clear my old doubts... On 8/30/06, *Michael Schippling* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: I don't know the message rate you can expect from moteiv motes but if you are trying to send one sample every 10ms you are probably pretty close to the limit (somewhere on the order of 100 msg/sec is the max for micaz's). You'll probably need to collect multiple samples in one message to get anywhere at 30Hz... Let me know if you need clarification one answers to your other questions. MS siva prasad wrote: From: *siva prasad* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Date: Aug 28, 2006 12:52 AM Subject: Delta application -help required To: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu hi all... i am working on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while i tried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz... if i increase the sampling time to 10ms ..i am losing lots of packets... can any body pls help me... thanks siva katru ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU mailto:Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Ideas needed
forget abour documenting... after all, i'll need something up and running for a demo, in addition to the fact that we are planning to finish the graduation project :o)mobile ad-hoc routing algorithms sounds interesting... have you got any resources about it? i'm still searching for an idea, if anyone else have one, plz let me knowthanksOn 8/30/06, Michael Schippling [EMAIL PROTECTED] wrote:Someone once mentioned to me that documenting the TOS 1.1.x componentsand interfaces would make a good masters project...hehMSps...mobile ad-hoc routing algorithms were also recent mentioned.I know there's a lot of stuff done, in theory, for cell-phones and stuff, but it might be interesting to see if any of it works...DoomaR wrote: Hello all, I'm planning to work on my graduation project on Wireless Sensor Networks, and I found that TinyOS is very famous in this field. But I didn't decide yet what will be the project, and I need to know the fields of research in WSN. Has anybody any recommendations or ideas? Thanks in advance ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Trawler problem: Why nodes don't appear?
Hi, I installed tmote tools using tmote-sky installation CD. I try to run trawler with Delta application. The oscopepart works, but no node appear on the topology page. Does anybody have idea about this problem? thanks in advance. Fenghua ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Ideas needed
See, this is the problem with software education these days. There is no way to demo the documentation.. I met a lovely woman from the Univ of Chicago who was doing her dissertation on mobile routing a couple years ago, but I'm afraid that I don't have any concrete leads for you. Google is God. MS Dooma® wrote: forget abour documenting... after all, i'll need something up and running for a demo, in addition to the fact that we are planning to finish the graduation project :o) mobile ad-hoc routing algorithms sounds interesting... have you got any resources about it? i'm still searching for an idea, if anyone else have one, plz let me know thanks On 8/30/06, *Michael Schippling* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Someone once mentioned to me that documenting the TOS 1.1.x components and interfaces would make a good masters project... heh MS ps...mobile ad-hoc routing algorithms were also recent mentioned. I know there's a lot of stuff done, in theory, for cell-phones and stuff, but it might be interesting to see if any of it works... DoomaR wrote: Hello all, I'm planning to work on my graduation project on Wireless Sensor Networks, and I found that TinyOS is very famous in this field. But I didn't decide yet what will be the project, and I need to know the fields of research in WSN. Has anybody any recommendations or ideas? Thanks in advance ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU mailto:Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] How to access the flash on TELOSB
Hi, There is a 1M external flash for data logging in TELOSB. How can I implementate it with writing and reading data? Similar to the internal flash on the msp430? Sorry for bother again. Thanks. Best regards, Vincent [EMAIL PROTECTED] 2006-08-30 ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] How to access the flash on TELOSB
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 of that system for details. Content preview: Refer to TEP103 ( http://www.tinyos.net/tinyos-2.x/doc/html/tep103.html ) and some codes in apps/tests/storage/ . Hyungjune [...] Content analysis details: (5.3 points, 5.0 required) pts rule name description -- -- 0.5 FROM_ENDS_IN_NUMS From: ends in numbers 0.4 DNS_FROM_RFC_ABUSE RBL: Envelope sender in abuse.rfc-ignorant.org 1.4 DNS_FROM_RFC_POST RBL: Envelope sender in postmaster.rfc-ignorant.org 0.0 MSGID_FROM_MTA_HEADER Message-Id was added by a relay 3.0 FORGED_MUA_OUTLOOK Forged mail pretending to be from MS Outlook ---BeginMessage--- Refer to TEP103 ( http://www.tinyos.net/tinyos-2.x/doc/html/tep103.html ) and some codes in apps/tests/storage/ . Hyungjune - Original Message - From: Vincent [EMAIL PROTECTED] To: Tinyos-help Tinyos-help@Millennium.Berkeley.EDU Sent: Wednesday, August 30, 2006 8:34 PM Subject: [Tinyos-help] How to access the flash on TELOSB Hi, There is a 1M external flash for data logging in TELOSB. How can I implementate it with writing and reading data? Similar to the internal flash on the msp430? Sorry for bother again. Thanks. Best regards, Vincent [EMAIL PROTECTED] 2006-08-30 ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ---End Message--- ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
again thanks for tht explanation...i can understand tht problem... As i told previously,my system is highly dynamic in nature...in order to monitor such dynamical system is there any better idea...not like sending 10 readings in one packet after 10ms... thanks in advance... siva katru On 8/30/06, Michael Schippling [EMAIL PROTECTED] wrote: As I said, based on my (small) experience with micaz I believethat 100 messages per second is about the max you can expect. And that 100 is for the total system, not per mote (unless ofcourse you have only one mote transmitting). If you are doingmultihop then you need to divide the total messages by thenumber of hops (each hop being it's own message) to get even a best case estimate -- ignoring hidden nodes and any otheractual practical considerations.So the only way I see to get your higher sample rate is toaggregate samples, say 10 per message. You would need to do some testing in various configurations to see how manymessages you can get...let's say, the source and two hops givesyou best case 30 msg/sec, with 10 samples/msg, is 300 samples/sec.Nobody said that motes were a High Speed sensor network... MSsiva prasad wrote: thanks for ur reply michael, if i sample the signal at 1ms(suppose for 50hz signal) then it will be better ...that is required for my application ...one more thing is that, the system tht i want to monitor is highly dynamic in nature..so the data should be send for every 1ms...i think 1ms is sufficient for just measuring the external ADC value..and sending this value using multihop(must) technique... But the problem is. i am losing lot of packets abt 50% even for the sampling period at 10 msdo u hav any different idea tht ...how can i overcome this problem any help should be highly appreciated... if we cant sample and send(using multihop) the data in 1ms ...pls give the reason... still i did nt clear my old doubts... On 8/30/06, *Michael Schippling* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: I don't know the message rate you can expect from moteiv motes but if you are trying to send one sample every 10ms you are probably pretty close to the limit (somewhere on the order of 100 msg/sec is the max for micaz's). You'll probably need to collect multiple samples in one message to get anywhere at 30Hz... Let me know if you need clarification one answers to your other questions. MS siva prasad wrote: From: *siva prasad* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Date: Aug 28, 2006 12:52 AM Subject: Delta application -help required To: tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu hi all... i am working on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while i tried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz... if i increase the sampling time to 10ms ..i am losing lots of packets... can any body pls help me... thanks siva katru ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU mailto: Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] Delta application -help required
Keptin, I kenna change th'laws o'physics... siva prasad wrote: again thanks for tht explanation...i can understand tht problem... As i told previously, my system is highly dynamic in nature...in order to monitor such dynamical system is there any better idea...not like sending 10 readings in one packet after 10ms... thanks in advance... siva katru On 8/30/06, *Michael Schippling* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: As I said, based on my (small) experience with micaz I believe that 100 messages per second is about the max you can expect. And that 100 is for the total system, not per mote (unless of course you have only one mote transmitting). If you are doing multihop then you need to divide the total messages by the number of hops (each hop being it's own message) to get even a best case estimate -- ignoring hidden nodes and any other actual practical considerations. So the only way I see to get your higher sample rate is to aggregate samples, say 10 per message. You would need to do some testing in various configurations to see how many messages you can get...let's say, the source and two hops gives you best case 30 msg/sec, with 10 samples/msg, is 300 samples/sec. Nobody said that motes were a High Speed sensor network... MS siva prasad wrote: thanks for ur reply michael, if i sample the signal at 1ms(suppose for 50hz signal) then it will be better ...that is required for my application ...one more thing is that, the system tht i want to monitor is highly dynamic in nature..so the data should be send for every 1ms...i think 1ms is sufficient for just measuring the external ADC value..and sending this value using multihop(must) technique... But the problem is. i am losing lot of packets abt 50% even for the sampling period at 10 msdo u hav any different idea tht ...how can i overcome this problem any help should be highly appreciated... if we cant sample and send(using multihop) the data in 1ms ...pls give the reason... still i did nt clear my old doubts... On 8/30/06, *Michael Schippling* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: I don't know the message rate you can expect from moteiv motes but if you are trying to send one sample every 10ms you are probably pretty close to the limit (somewhere on the order of 100 msg/sec is the max for micaz's). You'll probably need to collect multiple samples in one message to get anywhere at 30Hz... Let me know if you need clarification one answers to your other questions. MS siva prasad wrote: From: *siva prasad* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Date: Aug 28, 2006 12:52 AM Subject: Delta application -help required To: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu mailto: tinyos-help@millennium.berkeley.edu mailto:tinyos-help@millennium.berkeley.edu hi all... i am working on sampling the ADC value instead of DEmosensorc...in the delta application provided by moteiv. i am glad to say tht ..i hav successfully compiled it ... and installed..it worked... the problem is when i tried to undrstand the program..i am facing some difficulties - i could nt understand the task..named...sendDone( ) - while i tried to see the raw data using listen tool...it is showing 42 bytes...but i could nt figured out the data format.. -one more problem is...the signal tht i want to sample is a low frequency signal..abt 30Hz... if i increase the sampling time to 10ms ..i am losing lots of packets... can any body pls help me... thanks siva katru ___ Tinyos-help mailing list
