Prepare an SDHC card with a capacity of 8G or above, unzip the EFlasher firmware and the flash tool win32diskimager separately, and run win32diskimagerI as an administrator under Windows. On the interface of win32diskimagerI, choose your card drive letter After decompressing the EFlasher firmware, click the Write button to burn to the card, or use the dd to write the EFlasher firmware to the card under Linux; After the programming is completed, eject the card from the computer, insert the development board and start the development board, then the system will start from the card and start automatically. EFlasher programming tool, you have multiple ways to operate EFlasher: 1: Connect -compatible or LCD display and USB mouse, operate EFlasher on the graphical interface, 2: Connect the development board to the LAN through a network cable, log in to the development board through ssh, and then enter the eflasher to operate according to the prompts of the line. (Note: The user logged in by ssh is root, the password is , and the development board IP can be viewed (Obtained in the background of the router) 3: Log in to the serial terminal through the debugging serial port, enter the eflasher on the terminal to operate; 4: Connect an Icd2usb accessory to the development board, press the accessory. The K1 key above can select the system to be programmed, then press the K2 key to confirm the programming, the programming progress will be displayed on lcd2usb .; After the programming is completed, cut off the power, then pull out the card on the development board, and then power on again, the development board will start the system you just programmed from eMMC Material: PC+Metal colour: As shown Package Contents: 1 x M.2 Extension board 1 x Mini PCB adapter for the connection to the on-board M.2 socket 1 x Ribbon cable 1 x Mounting bolts and screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.