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  1. Home
  2. Troubleshooting
  3. Arduino UNO ethernet gateway problem

Arduino UNO ethernet gateway problem

Scheduled Pinned Locked Moved Troubleshooting
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  • A Offline
    A Offline
    ArduiSens
    wrote on last edited by
    #11

    Hello,
    You will solve the problem when compiling your arduino sketch with IDE 1.6.8.
    I have compiled my UNO with ethernet shield at top 2 minutes ago and now I have full contact with Domotics (on Synology NAS).
    go for it!

    MySensors 2.3.2; contr:Domoticz; layer: RS485, nRF24; gw: Ethernet, Serial

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    • M Offline
      M Offline
      Misna
      wrote on last edited by
      #12

      Hi!

      Investigating this issue it seems that my chinese ethernet shield has the wrong kind of terminating resistors on the ethernet line as described here.
      So first I'll try to apply the common fix for that problem (change the resistors) and then I'll get back to you.

      Btw thanks for the awesome support!

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      • gohanG Offline
        gohanG Offline
        gohan
        Mod
        wrote on last edited by
        #13

        Do you have a link for that fix? I may try to fix the faulty one that I have

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        • M Offline
          M Offline
          Misna
          wrote on last edited by
          #14

          Hi!

          Sure. Here is the link: https://forum.arduino.cc/index.php?topic=351477.15

          There are many options for the fix but the easiest is defined by klggi on page2 (just solder 2 100ohm resistors on the backside of the ethernet connector).
          I'll try to apply this fix tomorrow evening, I'll get back to you on how it went.

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          • gohanG Offline
            gohanG Offline
            gohan
            Mod
            wrote on last edited by
            #15

            On second thought maybe I'll skip the fixing, too much hassle to handle with SMD without proper tools :D

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            • M Offline
              M Offline
              Misna
              wrote on last edited by Misna
              #16

              @gohan check the post by klggi. No need to touch the SMD's, just solder 2 regular resistors to the backside of the connector.
              0_1490608510254_Terminations.png

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              • M Offline
                M Offline
                Misna
                wrote on last edited by
                #17

                Evening!
                Happy to report that soldering the two resistors to the back fixed the problem!
                So no need to downgrade Arduino IDE etc..

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                • gohanG Offline
                  gohanG Offline
                  gohan
                  Mod
                  wrote on last edited by
                  #18

                  in fact i have that 511 resistor in the back of connector. What resistors did you use?

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                  • M Offline
                    M Offline
                    Misna
                    wrote on last edited by
                    #19

                    I used just regular 100Ohm resistors like this 0_1490677932738_img.jpg

                    gohanG 1 Reply Last reply
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                    • M Misna

                      I used just regular 100Ohm resistors like this 0_1490677932738_img.jpg

                      gohanG Offline
                      gohanG Offline
                      gohan
                      Mod
                      wrote on last edited by
                      #20

                      @Misna Added the 2 100Ohms resistors and it seems it is working. Maybe I could order some more shields and complain again they are faulty and have them refunded and do this quick repair :D
                      At least it would be a little revenge on the many hours I lost with this faulty shield

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