Contiki NG on S2-LP: "HTTP socket error: hostname not found"

[faruk]

Originally a reply to this - split to a separate thread as it is a different STM32, different radio, and a new question.

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Thank you for your answer. I may consider embenet as option. 

Another thing that I'm trying right now is Contiki NG. I use STM32L152 Nucleo and S2-LP. I succesfully ran border router app and udp client. The next thing I'm trying to do is to run some other examples from contiki os repo like http-example. I removed udp-client file and cp[oed http-example.c file instead. I had to do some modifications in Makefile as. I also added 

#define BORDER_ROUTER_SCENARIO 1
#if BORDER_ROUTER_SCENARIO
#include "net/ipv6/uiplib.h"
#define BORDER_ROUTER_SCENARIO_ADDRESS "aaaa::1"
#endif /*BORDER_ROUTER_SCENARIO*/

in the contiki-platform.c 
I have output:

url http://www.contiki-ng.org host www.contiki-ng.org port 80 path /
Resolving host...
But i get the error "HTTP socket error: hostname not found"


So my questions are:

1. Should the end device(now running http-example) be connected to the internet, or some additional modification of the border router is required ?

2. How to resolve the error ?

[Andrew Neil]

Please see this (also this) for how to properly post source code. I've edited  the post for you.

 

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@faruk wrote:

url http://www.contiki-ng.org host www.contiki-ng.org port 80 path /
Resolving host...
But i get the error "HTTP socket error: hostname not found"

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"Resolving" a Host refers to converting the human-readable text address "www.contiki-ng.org" to its actual IP address.

This is handled by DNS - the Domain Name System:

https://en.wikipedia.org/wiki/Domain_Name_System#:~:text=An%20often%2Dused,locates%20the%20services.

 

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@faruk wrote:

1. Should the end device(now running http-example) be connected to the internet

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Of course it must be - because:

1. http://www.contiki-ng.org is an internet site - you cannot connect to it without an internet connection!
2. DNS relies upon an internet connection.

 

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@faruk wrote:

2. How to resolve the error ?

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You will need an internet connection, properly configured with a DNS server.

You're going to have to study the Contiki-NG documentation and/or ask on the Contiki-NG community for specific Contiki-NG support:

 

[faruk]

Thank you, 

 

I see that tunslip6 creates the tun0 device, but the interface does not have connection. I guess that is the reason why get request fails. Does anybody have experience with this ?

[Andrew Neil]

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@faruk wrote:

Does anybody have experience with this ?

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Those who do are most likely to be found in the Contiki-NG community!