Arduino DDNS (Dynamic DNS)

By on April 8, 2011
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This device captures the IP address of your network and it publish on site DynDNS.com. All without PC. It allow a remote access to your LAN even if the IP address of the connections changes.
For logistics reasons the provider can not assign a IP fixed for all users, so many users, especially private, work with a dynamic IP or public IP: in practice when they connect modem or router, to their connection is assigned an IP address that, when the connection will’be closed, can be used by other users. This makes impossible to contact a remote computer or device connected to a LAN Internet.


If you want to access to a device connected to your home LAN (so not with static IP) you must use a service like DynDNS, because every time you connect your ISP dynamically assigns a new IP address.

If you don’t want to use the software provided by DynDNS, and then leave the PC switched on continuously, the solution is this project.
Our device queries the site http://checkip.dyndns.com/ to know the IP currently used for the connection, and then publish your free account to www.dyndns.com instead of the computer acquired the new IP. Such a device therefore allows to locate a LAN connected to the Internet via a router or modem network.

Our device is essentially a publisher of IP address. Everything is made ​​from a circuit that incorporates an Ethernet interface WIZnet WIZ811MJ, managed by an Atmega328 microcontroller programmed with the Arduino bootloader, so it all works like an Arduino and you can use the Arduino IDE. The Atmega I/O PB2, PB3, PB4 and PB5 are dedicated to dialogue with the Ethernet module and provide a full four-wire SPI bus. The microcontroller is programmed using the special interface TTL / USB from SparkFun.
The main program sends the request to the IP address http://checkip.dyndns.com/ site. Now prepare the process of submitting to the site www.dyndns.com, which provides for the opening of a session onthe web page on, where will send data strings containing user name and password, thena string containing the Current IP connection. Cyclically
the microcontroller check the IP to see if the address is changed, then, if it’s true, sends the new IP to www.dyndns.com

We use a dedicated circuit but the project can be replicated using an Arduino UNO and a Ethernet Shield.

Sketch Code for Arduino DDNS (Dynamic DNS)

 

Download ZIP File

Download the DDNS sketch for Arduino


BOM



About Boris Landoni

Boris Landoni is the technical manager of Open-Electronics.org. Skilled in the GSM field, embraces the Open Source philosophy and its projects are available to the community.
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  • Dave

    Great project! What are your values for C5, C6, & C7? I don’t see them listed in the BOM. Same with Q1 though I imagine that is the standard 16MHz crystal oscillator.

    Thanks.

  • Ops… :-)
    I add the components.

  • Xiszone

    Hello
    It is a very nice project and exactly what i need.
    It is possible to buy the assembled bord from you?

  • Hi, we can sell only
    U1: WIZNET
    U2: ATMEGA328P (with Arduino bootloader)
    We haven’t the PCB.

  • dmsherazi

    HI , Nice work , I wanted to implement the dyndns in my project, but i am not fimilair with aurduinos, can u please let me know how would i update my ip address on dyndns using AT commands . I know i have to send http://username:password@members.dyndns.org/nic/update?hostname=yourhostname&myip=ipaddress

    but how to do that in AT commands i am usnig the same sim900

  • I suggest you to study this firmware
    http://www.open-electronics.org/mini-gsm-localizer-without-gps/
    You have to connect to the site adding the parameters.

  • dmsherazi

    HI , thanks for ur prompt reply …

    I checked dyndns support and also the firmware and then connected to the member.dyndns.com

    and sent this data

    GET /nic/update?hostname=gsm.xxxxxx.com&myip=12.12.33.4&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG HTTP/1.0
    Host: 204.13.248.112
    Authorization: Basic a2lxxxxxxxxxxxxxx3M=
    User-Agent: kindows- 12hh- 1.1

    but i get badagent in responce when i connect to port 8245 , if i conncet to port 80 i get no reponse!!

  • Hi, Try to post your problem on facebook http://www.facebook.com/OpenElectronics

  • @ BORIS

    hi its dm sherazi here, actually i got the problem solved the problem was with the hyperterminal , i used docklight and it worked well, and then when i programmed my mcu its still working great .

  • hi dmsherazi, this is a good news. ;-)

  • Snooper1

    I like your dyn DDNS project. I’m having issues trying to use IDE 1.01

    I have a Arduino UNO V3

    And a Arduino Mega V3

    Both use the Arduino Ethernet shield

    What Arduino build did you use?

    Can you help to update it to the latest Arduino IDE?

  • clayzz jr

    Hello.. i have a problem..
    When the first run of program.. it works fine and update my ip to dyn.
    When i connect to checkip.dyndns.org second time after 30 sec .. it just connect and disconnecting.. and i must reset arduino to update again.. any help ?

  • Anil

    Doesn’t the router have to do the DDNS? Or is the Arduino here acting as the router? If my router has DDNS, I will simply use that and NAT the Arduino’s IP.