Currently reflash utility is available for Linux and Windows.

For Linux: ftdi_sio module should be active on the system for USB-to-serial converter FT232, installed on the board.

For Windows: FT232RL USB to serial converter drivers should be installed on the system. You can find the driversin myCNC sosftware ditributive package or download it directly from FTDI web site (try to Google "ftdi chip ft232")

  To update firmware:

1. Host PC should be connected to the Internet.
2. Download firmware burner utility:
   For Linux: burner-mycnc-up31.tar.gz
   (for old revision of myCNC-UP3 board)
   For Windows: burner-mycnc-up31-win.zip
3. Extract file from archive -
   
   for Linux - tar.gz archive; use command
   tar zxf burner-mycnc-up31.tar.gz
   
   for Windows - zip archive. Use internal Windows tools (assigned with right mouse button)
   to extract the files.
4. Power up the board (+24V DC power supply) and connect with Host PC via USB.
5. Close Jumpers J4(Reset) & J5 on the board.
   
   
   
6. Run separate terminal window (console) and goto the burner folder.
7. Run the utility in the terminal.
   For Windows-
   burner-mycnc-up31.exe
   
   for Linux-
   ./burner-mycnc-up31
   
   
   If you see message "Synchronizing (ESC to abort)......", 
   then you have about 5 seconds to open J4 jumper.
   Reflash process should start.
   After the process is finished you may open  J5 jumper and restart (power off, wait 2 seconds, power on) the board.