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USB - G-code

Connecting to WiFi

  1. Connect USB to computer, preferably with PuTTY or similar program (see notes section below).
  2. Use command “M550 SSID” - Replace “SSID” with the name of your WiFi network
  3. Use command “M551 PASSWORD” - Replace “PASSWORD” with the password for your WiFi network
    Need help on how to send these commands? See Sending G-code
  4. You should see IP address displayed in title bar where no connection was once displayed
M550 SSID         ;SSID = Name of WiFi network (case sensitive)
M551 PASSWORD     ;PASSWORD = Password for WiFi network (case sensitive)


  • Some or possibly most slicer and Pronterface like programs will either convert the first character after each space to uppercase or convert all characters to uppercase. This means that it is possible that your SSID and/or password are not being sent correctly.
  • Connecting via USB (serial) will send all characters without converting them to uppercase. However, I have found that a SSID and/or password that is longer than 31 characters will not work. If you have a SSID and/or password that is longer than 31 characters, please try the mobile apps.
  • WiFi and USB cannot access simultaneously.
  • Disconnect USB cable from the printer if you want to use the WiFi function.
  • WiFi works with 2.4 GHz b/g/n networks only.
  • These next two notes apply to when connecting using the Android & iOS apps.
    1. If you have a 2.4 GHz and 5 GHz network using the same SSID(wireless network name) you may have trouble connecting the printer.
    2. For initial WiFi setup try moving the printer closer to the WiFi router.
wifi/g-code_usb.txt · Last modified: 2018/08/01 03:57 by Matthew Upp