Download and install the USB serial port driver. (unzip the driver file, then install it with administrator privileges)
This is driver for Serial to USB driver (CH34x). You may already have it on your system
Before updating the firmware, please close other serial port tools to prevent the serial port from being occupied and unable to update.
If you open Cura, you need to close it. When Cura is opened, it will automatically occupy the serial port.
Download and install the NodeFlashTool-v0.4 (unzip the driver file, then install it with administrator privileges)
Click “Reload”， NodeFlashTool will auto check Node’s serial port number.
If you are updating the firmware for the first time, it is strongly recommended to perform this step.
After the chip is erased, all wifi information and settings will be erased and need to be reset
Click the "Up AIO" button in the red box in the right picture to start flashing the firmware. During the flash process, you can see that there are percentage numbers in the text output box below.
When you see the text in the red box on the right appear, the firmware upload is successful.