I can not connect with Mr Beam II.
I can not load the Mr Beam II interface or I do not know what to put in my browser.


Here are some steps that help to solve or at least narrow down the problem. The best way is to follow the steps in the given order:

  1. First the easiest: Go to and check if you get connected to your Mr Beam II in this way. 

    • After powering on, it may take 1-2 minutes for Mr Beam II to be recognized by If the network configuration has been changed, it can take up to 5 minutes.

    • requires an active Internet connection: both Mr Beam II and your computer must be connected to the Internet.

    • works with the most common network configurations. However, this service may not be compatible with your specific network configuration. 

  2. Check if Mr Beam II WiFi access point is active. 

    1. Search your computer or smartphone for a WiFi called "MrBeam-XXXX", where XXXX are placeholders. The exact name of your Mr Beam II is identical to the WiFi name and is printed on the silver sticker on the back of the device.

    2. When you see the WiFi access point, connect to it. 

      • The password is: "mrbeamsetup". 

      • If you are connected to this WiFi access point, enter the following IP address in your Chrome browser:

    3. Good to know:
      • After turning on Mr Beam II, it may take up to 3 minutes for the computer to recognize the WiFi access point. If necessary, try first to turn off the WiFi module on your computer and then on again, so you can be sure that your computer displays an up-to-date list of all WiFis.

      • Also make sure that your computer is in close proximity to Mr Beam II. If this is difficult, you can also use a smartphone to test whether the Mr Beam II WiFi access point is visible.

      • While your Mr Beam II is providing the WiFi access point, it does not have an Internet connection, so it is not possible to install software updates. Also will not work. (Other IP addresses or local hostnames such as MrBeam-XXXX.local may work.) Your computer may not be connected to the Internet as long as you are connected to the WiFi access point of your Mr Beam II.

  3. Try to find your Mr Beam II using common addresses/hostnames.

    1. Try to reach Mr Beam II at the following addresses, always replacing XXXX with the specific name of your device found on the silver sticker on the back of your Mr Beam II. 

    2. Make sure that you are not accidentally connected to the WiFi access point of your Mr Beam II while trying the above addresses or

  4. In Windows you might find Mr Beam II in the “Network” section of Windows File Explorer, formerly called “My network Places”.

    1. Mr Beam II is displayed here as "OctoPrint instance on…".

    2. Double-clicking on the Mr Beam II entry will take you to the Mr Beam II interface.

    3. Windows “Network” section is not be available in all Windows installations or might be disabled.

  5. Identify the IP address of your Mr Beam II.

    • Try to find the IP address of a Mr Beam II with a LAN scanner program. We recommend the app "Fing" ( for Android and iOS, as it is reliable and easy to use. 

      1. After scanning your network with Fing, you should have one or more "Raspberry Pi" devices in the list. This device is probably your Mr Beam II.

      2. See if you can reach your Mr Beam II by entering the according IP address (e.g.: in the address bar of your Chrome browser and pressing Enter.

    • It is also possible to find out the IP address of a Mr Beam II using one of our USB sticks. Download the file "IP Tool (USB)" from and unzip it. Therein you will find a SIG file and a README.pdf which contains detailed instructions on how to find and use your Mr Beam II IP address. The most important things in a nutshell:

      1. On a USB stick, create a folder called "mrbeam" and copy the SIG file into it.

      2. Insert the USB flash drive into your Mr Beam II and wait until its lights turn green.

      3. Now you will find a file "get_ip.txt" on your USB flash drive which contains the current IP addresses of your Mr Beam II.

      4. See if you can reach Mr Beam II by entering these IP addresses one by one in the address bar of your Chrome browser and pressing Enter.

    • In general, it is important to know that IP addresses in a network usually change frequently. However many WiFi routers allow you to set that certain devices get always assigned to the same IP address. If you can only connect to your Mr Beam II by using IP addresses, we recommend that you do this on the router.

    • If you have some basic understanding of computer networks you can also assign a static IP address to your Mr Beam II using the aforementioned  "IP Tool (USB)" from More information on how to do this can be found in the included README.pdf. 

  6. Try connecting Mr Beam II to your router via cable.

    • If none of these steps have helped so far, please connect Mr Beam II to your router using a network cable and repeat steps 1,3,4 and 5 (not step 2).

    • To be on the safe side, reboot Mr Beam II after connecting the network cable and wait 1-2 minutes.

    • Make sure you do not accidentally plug the network cable into the Air Filter jack.

    • A direct cable connection between your computer and Mr Beam II often doesn't work. 

If you continue facing issues with the connection, please don't hesitate to contact us by opening a new ticket.

To be able to help you please try to forward us, as many specific description of your problem as you can:.

  • What you have tried 

  • What was working or not working 

  • Screenshots for example with your Smartphone might be helpful for us