How to setup TCP/IP connection

[CH P]

Hi,

I have been following Wifi setup instructions, but got stuck at the following steps,
which is quite unclear. Could you please elaborate in steps and tools for me?

##########(Copied form the instruction page)######################
Sending a UDP message back to the EV3

The contents of the data is irrelevant so just send a single byte. The important thing is that you send it to the source port that was used in the bricks broadcast message ( this is not port 3015). Once a message has been send the brick is ready to accept a TCP/IP connection.
Establish a TCP/IP connection

Connect to the brick using TCP/IP on port 5555 and use this connection to send the unlock message
Sending the unlock message

The unlock message has the following format:

GET /target?sn=0016533F0C1E VMTP1.0
Protocol: EV3

Where 0016533F0C1E is the serial number from the UDP broadcast. The brick should now reply with a 16 byte TCP/IP message with the following text:

Accept:EV340

indicating that the connection has been established. Now you should be able to send both system and direct commands to the brick over a WiFi connection.
#####################################################

My questions from the above steps are:

1. How do I “Send a UDP message back to the EV3” before I make a connection? Is there a specific program?
I looked up menues on the Wireshark, but it seems to be a network monitoring program only.

2. How do I send the “unlock message” ?

[Anders Søborg]

Hi

I think that you might have mixed using “MonoBrick communication library to connect to the EV3 over a WiFi connection” with “Connecting the EV3 to a WiFi network”.

What is it you want to do?

Anders

[anprieto]

Hi,

I am also stuck on the same step.

In this page: http://www.monobrick.dk/guides/how-to-establish-a-wifi-connection-with-the-ev3-brick/

first step is to connect ev3 brick to wifi. That is easy and already done.

Second step to open connection is Establishing a TCP/IP, listening to an UDP message and sending back another message to open connection.

I need some help to do this entire second step.

thanks
antonio

[Anders Søborg]

Hi Antonio

What is it that you are trying to do?

Are you trying to connect to the EV3 over a WiFi connection using MonoBrick communication library?

Anders

[anprieto]

Hi Anders,

yes I’m trying to do that, and it seems I have to stablish a tcp ip connection, wtih which I am having problems, as instructions here are not as clear as others: http://www.monobrick.dk/guides/how-to-establish-a-wifi-connection-with-the-ev3-brick/

[Anders Søborg]

Hi

These instructions are if you need to know how a TCP/IP connection is established with the standard firmware. If you just need to use the MonoBrick communication library then simply follow this programming guide found here.

Anders

[Author]

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