Example for Arduino-Serial Port Reset
Last revision 2026/01/13
This guide explains how to reset the Arduino serial port using a Blink function to resolve program errors, with detailed steps on hardware and software preparation and operation instructions.
Hardware Preparation
- Firebeetle 2 M0 Development Board(SKU: DFR0652) ×1
- USB Cable ×1
Software Preparation
- Download Arduino IDE: Click to download Arduino IDE
- Install FireBeetle 2 M0 board URL: https://downloadcd.dfrobot.com.cn/boards/package_DFRobot_index.json
Operation instructions
Program error causing the loss of the serial port? We have designed a Blink reset function that resets the program to RGB Blink, making it easier to recover the serial port.
Hold the ~4 button, then press RST to enter the reset preparation state, where it will wait for two seconds. During this preparation state, the ~8 RGB light will turn red, and the ~13 LED will also stay lit.
After the red light turns on, press ~4 to start burning the RGB Blink program. During burning, the RGB light turns blue. The burning process is very fast, so the blue light usually flashes briefly.
After successful burning, the RGB light will emit red, green, and blue light sequentially. At this point, connecting the board to the computer will normally detect the serial port.
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