[riot-devel] Transmission performance with CC1101 radio
Hello,
I am trying to determine the highest datarate possible using the CC1101
radio.
My use case is the transmission of media files.
With the following configuration I have only been able to achieve *1.24KBps*
:
* modulation: 2-FSK
* Frequency: 869,25 MHz
* Datarate: 299.926 KBauds
* udp as transport protocol
* with gnrc_sixlowpan_iphc module disabled
To measure the data-rate I modified udp.c in examples/gnrc_networking
*@ udp.c*
I am printing the time between each packet sent, the time of all packets
sent and the total number of Bytes transmitted. I defined *y* and *n*:
uint32_t *y* *=* xtimer_now*();*
*for* *(*unsigned int i *=* 0*;* i *<* num*;* i*++)* *{*
uint32_t *n* *=* xtimer_now*();*
And *m*, before the for ends and* x* after it finishes
uint32_t *m* *=* xtimer_now*();*
printf*(*"Time per packet (ms): %ld\n"*,(*m*-*n*)/*1000*);*
*}*
uint32_t *x* *=* xtimer_now*();*
printf*(*"Total Bytes sent: %u\n"*,* strlen*(*data*)**num*);*
printf*(*"Total time (ms): %ld\n"*,(*x*-*y*)/*1000*);*
*@Terminal*Packets are sent by:
2016-07-04 14:35:27,609 - INFO # > udp send fe80::ff:fe00:66 5
01234567890123456789 100 9500
which sends through port 5 packets of 20 Bytes, 100 times with a delay of
9500 *us* between them.
As a result I get this:
2016-07-04 12:09:48,179 - INFO # Time per packet (ms): 13
2016-07-04 12:09:48,180 - INFO # Total Bytes sent: 2000
2016-07-04 12:09:48,180 - INFO # Total time (ms): 1612
In addition, with this configuration, I am receiving 38 packets of the 100
packets sent.
When trying to reduce the delay time between each packet to 9 000 *us*, the
transmitter stops and does not send anymore even if I put back delay time
to 9 500 *us, *only transmits back again when I reset it.
The more packets I try to send in that loop the larger the delay between
packets needs to be.
How can I further investigate where the bottleneck comes from? Or if you
have any idea on this issue?
Thanks in advance,
--
América
___
devel mailing list
devel@riot-os.org
https://lists.riot-os.org/mailman/listinfo/devel
[riot-devel] Communicating between radios CC1101
Hello developers, I have been working with two radios CC1101(each one with its CC1190 for power amplification) connected each one to an Arduino-due Board and they have been communicating properly. However, I have faced trouble when the message sended is *less than 12 Bytes*. CRC throws at reception, 0, resulting in packet error (crc_error). I have tried forcing it to 1 but the radio sets the source address undefined. Has anyone faced a similar problem? Any suggestion for solving this issue would be really appreciated. Best regards, América R. 2016-04-18 17:45 GMT-05:00 América Ramírez R. <d.america...@gmail.com>: > Hello again, > > After updating the RIOT database from github, the communication between > the radios is working, but I have a question, It seems not to be > receiving/sending any message that contains less than 12 Bytes, is this the > way it is supposed to be working? > > Thanks in advance, > > Sincerely > > -- > > América > > 2016-04-14 10:23 GMT-05:00 América Ramírez R. <d.america...@gmail.com>: > >> >> Hello, >> >> I've tried to connect two cc1101 radios using Atmel ATSAM3X from >> arduino-due with the gnrc_networking example. >> I've followed the recommendations given at >> https://lists.riot-os.org/pipermail/users/2015-November/000468.html but >> I haven't been able to connect so far. (connection stablished but ping >> messages get timedout) >> >> Also, I am printing a message everytime it transmits and I would like to >> know if it is correct that the radio transmits something from the moment it >> is started. >> >> Thank you, I look forward your reply. >> >> Sincerely, >> >> >> -- >> >> América >> > > > > -- > > América > -- América ___ devel mailing list devel@riot-os.org https://lists.riot-os.org/mailman/listinfo/devel
Re: [riot-devel] Problems with radio CC1101
Hello again, After updating the RIOT database from github, the communication between the radios is working, but I have a question, It seems not to be receiving/sending any message that contains less than 12 Bytes, is this the way it is supposed to be working? Thanks in advance, Sincerely -- América 2016-04-14 10:23 GMT-05:00 América Ramírez R. <d.america...@gmail.com>: > > Hello, > > I've tried to connect two cc1101 radios using Atmel ATSAM3X from > arduino-due with the gnrc_networking example. > I've followed the recommendations given at > https://lists.riot-os.org/pipermail/users/2015-November/000468.html but I > haven't been able to connect so far. (connection stablished but ping > messages get timedout) > > Also, I am printing a message everytime it transmits and I would like to > know if it is correct that the radio transmits something from the moment it > is started. > > Thank you, I look forward your reply. > > Sincerely, > > > -- > > América > -- América ___ devel mailing list devel@riot-os.org https://lists.riot-os.org/mailman/listinfo/devel
[riot-devel] Problems with radio CC1101
Hello, I've tried to connect two cc1101 radios using Atmel ATSAM3X from arduino-due with the gnrc_networking example. I've followed the recommendations given at https://lists.riot-os.org/pipermail/users/2015-November/000468.html but I haven't been able to connect so far. (connection stablished but ping messages get timedout) Also, I am printing a message everytime it transmits and I would like to know if it is correct that the radio transmits something from the moment it is started. Thank you, I look forward your reply. Sincerely, -- América ___ devel mailing list devel@riot-os.org https://lists.riot-os.org/mailman/listinfo/devel
