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    pjonsson opened #1892
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    nvt on develop

    Update tools/cooja submodule C… Merge pull request #1889 from p… (compare)

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    java 11 for cooja and fix mosqu… use add-apt-repository for cons… Merge branch 'contiki-ng:develo… and 1 more (compare)

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Mahboob Karimian
@mahboobkarimian
Before I continue, I'm really thankful to @arurke and @atiselsts for their time, help, and support.
1 reply
Andreas Urke
@arurke
I think Atis is more familiar, but I did have some interaction with dl-miss due to RxBeforeAck some time ago. In that case, not all dl-miss will cause a missed timeslot. Have a look at https://gitter.im/contiki-ng/Developers?at=61898be3d78911028a291e50 and the discussions and threads around it, there might be some helpful info. As a general note I know that excessive processing will induce misses.
Mahboob Karimian
@mahboobkarimian

I think Atis is more familiar, but I did have some interaction with dl-miss due to RxBeforeAck some time ago. In that case, not all dl-miss will cause a missed timeslot. Have a look at https://gitter.im/contiki-ng/Developers?at=61898be3d78911028a291e50 and the discussions and threads around it, there might be some helpful info. As a general note I know that excessive processing will induce misses.

I have a lot of this RxBeforeAck, TxBeforeTx, and ..., I need to ask our engineer who changed the timings of the radio.

Bushra4
@Bushra4
Is there a way to check whether a node is child node? for example node 2 gets DIO from node 3. How can node 2 know that node 3 is only a neighbor or it is its child node?
Bushra4
@Bushra4
@atiselsts can you answer please?
flyingmaster
@flyingmaster
Hi everyone, do you know if there are any commercial products using Contiki-ng TSCH stack? Another question, I'd like to know how the root device can recover the original TSCH network after a reboot or sudden power outage. In current code implementation, root can only start a new network at startup so that its children lost sync with the original network.
2 replies
Andreas Urke
@arurke
@Bushra4 With RPL classic I believe any node in the routing table is a child (except the default route which is the parent)
Bushra4
@Bushra4
@arurke I am using Contiki 3.0. Does the same go for it?
Andreas Urke
@arurke
@Bushra4 I don't know, but very likely yes.
(I would strongly recommend going to contiki-ng btw)
Bushra4
@Bushra4
Thank you @arurke
Acea
@Aaaccceeeaaa_twitter
Hello, would it be possible to setup a border router while using nullnet (no IPv6) ?
Otabek Sobirov
@Otabek8866
Hello all, is it possible to run cooja simulation without GUI? if so, will be there any difference? because I am trying to simulate 100 nodes and Cooja GUI seems really slow. If it is possible to use cooja simulation without GUI, is there any info or guide to do so? Please reply if you know. Thank you
Otabek Sobirov
@Otabek8866
is there any standard-compliant MSF implementation for Contiki-NG?
Atis Elsts
@atiselsts
@Otabek8866 yes, with the -nogui option :)
Atis Elsts
@atiselsts
@Otabek8866 this PR implements version 04 of the MSF Internet Draft: contiki-ng/contiki-ng#1000
1 reply
the MSF RFC corresponds to version 18 of the Internet Draft, so there's a bit of difference
Samhita Vempatti
@Samhita-sopho
Is this scenario possible to simulate in Cooja(even if it means changing some underlying stack code).
I would like to simulate a Man-in-the-middle attack with the CoAP protocol in Cooja.
I have been trying to get this to work for some time now, and I have also changed the underlying csma.c file to not drop packets not addresses to it .
17 replies
Mateusz Banaszek
@mateusz-banaszek
Hi, are you aware of any implementations of concurrent transmissions (Glossy and the like) for the TI CC2650? I would be grateful if could you point me to some (or share your own).
Atis Elsts
@atiselsts
@mateusz-banaszek probably impossible
I mean the so-called constructive interference is probably impossible with CC26xx chips. You can of course do multiple transmissions at the same time, and even observe the capture effect
6 replies
Mahboob Karimian
@mahboobkarimian
Hi. Is it normal to get a few "Already in RX when scheduling RX" WARN in the simplelink platform radio when using TSCH? I am referring to https://github.com/contiki-ng/contiki-ng/blob/45f2b493ebfd809731eb7f88b08fa5c853f59b6c/arch/cpu/simplelink-cc13xx-cc26xx/rf/sched.c#L575
Elisabeth Kusuma Adi
@elisabethEmack
Hi everyone! Currently, I am trying to implement centralized scheduling, and I want to add dedicated slot and shared slot for retransmission in my schedule. Does anyone know how to do this?
Bushra4
@Bushra4
I want to create a list on server in udp-server.c file. And make it reachable to all nodes. Is it possible? How?
Samhita Vempatti
@Samhita-sopho
@Bushra4 I am trying to simulate a similar kind of attack, could you give me details about your scenario as I might have some follow up questions if you are ok with answering them.
This is with respect to the attack for a malicious node dropping packets.
Elisabeth Kusuma Adi
@elisabethEmack
Hi everyone, does anyone know how to represent time in terms of ASN [1,2,....] ? I know that in we can derive the information of asn from tsch log, but is there a way to represent the asn in terms of regular number? Thanks!
4 replies
Elisabeth Kusuma Adi
@elisabethEmack
Hi everyone, i have some questions. Consider this scenario: suppose I have 2 cooja nodes, node 1 (as the coordinator), and node 2. The two nodes use channel hopping for communication. Now, I want to deploy a non-cooja node with sensiff example to snoop some packets from node 2 to 1. How to connect sensniff node to the communicating devices? Is it possible to deploy sensniff in sky-telosB? I am also wondering, how to catch packets in TSCH network with sensniff? Does it actively scan 16 channels all the time? Thanks in advance!
btgwynn
@btgwynn
I think the ability to connect two native motes over SLIP would be useful for developers. I often have an easier time programming in the native environment and then porting. I wrote about my attempt at making it work on stack overflow: https://stackoverflow.com/questions/72064263/connect-two-native-contiki-ng-motes-over-slip. I am held back by inexperience with working on projects the size of Contiki NG. If feedback on my code can be given I am sure it will go a long way to enabling this capability.
Ivonne Mantilla-Gonzalez
@azahhara
Hi! I have an issue with the MQTT client. It seems that packets to be published to a mosquitto broker are dropped by the backend implementation in Contiki-NG and a very low amount of packets can be transmitted. I use QoS =0 and set the keep alive period high enough to avoid constant connections and disconnections with the broker. Does anybody has experienced that?
Sougoulé Aboubacar
@Lkiraa
hello everybody! I want to implement increase rank attack in contiki-ng for my project but I don't know where to start. can someone help me with the source code? thanks in advance!
sahel-vafa
@sahel-vafa
@Lkiraa Hello , please see this paper : "A Reference Implemenation for RPL Attacks Using
Contiki-NG and COOJA"
Otabek Sobirov
@Otabek8866
Helle everyone, who knows if there is a TASA implementation with TSCH? Could you provide a link to the source code?
Otabek Sobirov
@Otabek8866
Is there any centralized TSCH scheduling algorithm implemented in Contiki-NG?
Sougoulé Aboubacar
@Lkiraa
Thanks you ! @sahel-vafa
Sougoulé Aboubacar
@Lkiraa
hello everyone, Does anyone know how to modify a DIO message from a node and broadcast it to its children afterwards?
Mahboob Karimian
@mahboobkarimian
@atiselsts what's the resolution of etimer in the simplelink platform? it's derived from systick, and I see a division by CLOCK_SECOND which is 128 for Simplelink: see https://github.com/contiki-ng/contiki-ng/blob/df0a157b2335ff9c3bfd40052edf66b8a1cb2c2b/arch/cpu/simplelink-cc13xx-cc26xx/dev/clock-arch.c#L229. So for me, it's 128/sec. In this commit, is it applicable when you set the tsch association poll to 1000 contiki-ng/contiki-ng@42802bb ?
4 replies
Javi Martinez
@JMartinezEco
Hello everyone? Have anyone information of how to make communication downwards. From a Root (UDP Server) to the motes (UDP Clients), without the mote having to start the message?
Manel Chahed
@Manel-Chahed_gitlab
Hello everyone, I have an issue with this command in contiki Cooja it dosen't work with me when I try to run the example of Contiki Cooja: msp430-gcc. Could anyone please help me??
Nikos Karamolegkos
@nkaramolegos

@izacarias

Hi guys! I'm using the new "OpenMote B", and every time I program the nodes, I end up locked out of the bootloader, and I have to erase the flash using the J-Link Tool (this is annoying :D). Any advice?

Do you find solution to that?

Mehdi Kherbache
@MehdiKherb
hello , i'm trying to use the NAT64 on contiki-ng in order to connect IPv6 nodes to an IPv4 host, when looking around i found that there are issues after the jool 4.0 upgrade and it is not possible to work with jool < 4v since my kernel doesn't support it (ubuntu 20.04) .. so is there any progress regarding jool support in contiki-ng or it is an abandoned road ?
Mehdi Kherbache
@MehdiKherb
i'm trying to connect a simulated MQTT client to an IPv4-only broker deployed locally, i'm having doubts on where should i configure the jool NAT64 in order to allow communication between the simulated MQTT client and the broker , either on my localhost or in the border router ? i'd really appreciate any guide on this :)
Daniil Hryharovich
@DanielKhan-v1
Hello everyone, I am trying to use Contiki-NG with CC2650stk (TI) for my research project. However, I have faced the issue that the binary files of a simplest "hello-world" example are 3-7 times bigger than the flash memory of my board. Is it normal or there is a way how to solve it?
Atis Elsts
@atiselsts
@DanielKhan-v1 are you sure about this? on the latest develop, I just checked with make -j TARGET=cc26x0-cc13x0 BOARD=sensortag/cc2650
result:
$ arm-none-eabi-size hello-world.cc26x0-cc13x0
text data bss dec hex filename
79672 1966 10872 92510 1695e hello-world.cc26x0-cc13x0
2 replies
Mohammad-Reza feyzi
@jones199
Hi Fiends how r u?
please help me to modify the Rpl Objective function . Does anyone Know How to do this? Thanks Alot
2 replies
Sungmin Lee
@sungminlee114
Hi all,
Is there any updates/discussion going on with issue contiki-ng/contiki-ng#1497?
F. Fernando Jurado-Lasso
@fdojurado
Hi all, any advice on the installation of Contiki-NG in Mac M1? I have tried docker and vagrant without luck. I have managed to run cooja natively but not cooja motes. Thank you.
Nikos Karamolegkos
@nkaramolegos
Hello, I have the following issue contiki-ng/contiki-ng#1121 with the openmote-b
I follow the A7-GND jumper workaround i.e If pin A7 is selected, I have to physically wire it to ground with a jumper wire during the flashing process for it to succeed. Luckily enough, pin A7 is exposed on the board's header, but then I can not see output of the serial (make login ..) if I don't remove the A7-GND jumper. Do you know if this a hardware issue as mentioned RIOT-OS/RIOT#11684 or can I fix it by changing something to the contiki-ng?