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added README that explains how to use the rpl_udp example application

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Lotte Steenbrink 2014-02-02 15:07:47 +00:00
parent 8d294d01ff
commit c1980e5fcf

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#tl;dr
command order:
set <node-id>
init [r|n]
server
send <node-id> <message>
# setup
compile the application
cd RIOT/examples/rpl_udp
make
Set up a bridge for *two* tap devices to communicate over
../../cpu/native/tapsetup.sh create 2
# rpl init
Run the first node
sudo ./bin/native/rpl_udp.elf tap0
Type ``help`` to see the commands available.
Now you need set the node ID. This ID will be used by other nodes to address this node.
> set 1
set 1
Set node ID to 1
Init your rpl node as either a root or a node router.
> init n
init n
INFO: Initialize as node on address 2
6LoWPAN and RPL initialized.
Channel set to 10
Destiny initialized
or
> init r
init r
INFO: Initialize as root on address 1
6LoWPAN and RPL initialized.
Channel set to 10
Destiny initialized
(It is advised to start all nodes before running the root node, because the interval for sending DIOs from the root increases over time)
A few seconds withing running, setting and initializing your second node, the nodes will automatically start to exchange control traffic. You should be seeing output similar to the following:
41 CC FC 34 12 36 12 00 FF FE 00 00 02 36 12 00 FF FE 00 00 01 7A 33 3A 9B 03 F9 90 00 00 04 00 00 80
IPv6 datagram received (next header: 3A) from fe80:0000:0000:0000:3612:00ff:fe00:0001 ICMP type: 5A ICMP code: 08
Received packet from ID 1
Length: 34
Src: 1
Dst: 2
LQI: 0
RSSI: 0
You can now use the ``dodag`` command to obtain information on the node's rank in the rpl dodag as well as their preferred parent
> dodag
dodag
---------------------------
Part of Dodag:
fe80:0000:0000:0000:3612:00ff:fe00:0001
my rank: 512
my preferred parent:
fe80:0000:0000:0000:3612:00ff:fe00:0001
---------------------------
#sending via UDP
In order to be able to receive UDP messages from other nodes, we have to start rpl_udp's UDP server:
> server
server
UDP SERVER ON PORT 511 (THREAD PID: 17)
When rpl is running, you can send a message from any participating node to the node initialized as a server (in our case, node 1) using the ``send`` command
> send 1 hi
send 1 hi
Successful deliverd 11 bytes over UDP to abcd:0000:0000:0000:3612:00ff:fe00:0001 to 6LoWPAN
In case of an error message, make sure that rpl is running and you've started the UDP server on the receiving node by running the ``server`` command.