How to setup TCP/IP connection

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This topic contains 5 replies, has 3 voices, and was last updated by Author Image Anders Søborg 3 years, 4 months ago.

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  • #4046
    Author Image
    CH P
    Participant

    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” ?

    #4056
    Author Image
    Anders Søborg
    Key Master

    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

    #4124
    Author Image
    anprieto
    Participant

    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

    #4129
    Author Image
    Anders Søborg
    Key Master

    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

    #4146
    Author Image
    anprieto
    Participant

    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/

    #4158
    Author Image
    Anders Søborg
    Key Master

    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

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