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FAQ

Q: How to check which COM port I am using?

  • Windows System:

      1. Check via Device Manager: Press Windows + R to open the "Run" dialog box. Type devmgmt.msc and press Enter to open Device Manager. Expand the "Ports (COM & LPT)" section. All COM ports and their current status will be listed here.
      1. Check using Command Prompt: Open the Command Prompt (CMD), type the mode command, which will display status information for all COM ports.
      1. Check Hardware Connection: If an external device is already connected to a COM port, the device typically occupies a port number. You can determine which port is being used by checking the connected hardware.

  • Linux System:

      1. Check using the dmesg command: Open the terminal.
      1. Check using the ls command: Type ls /dev/ttyS* or ls /dev/ttyUSB* to list all serial devices.
      1. Check using the setserial command: Type setserial -g /dev/ttyS* to view configuration information for all serial devices.
Q: Can you help me review or modify my code?

This product is positioned as a development board, not a finished product. Built around the ESP32 core, it benefits from a well-established development environment and rich community resources. We do not provide assistance with code modification. For any questions, please consult our engineers for support.

If you like our product and wish to customize hardware, casing, software, etc. in bulk, please feel free to contact our sales.

Bulk Customization

Q: Why is there no output even though the code is correct and flashed successfully?
  • Refer to the schematic. Depending on the Type-C interface of the different development boards, output handling in the code varies:
    • For development boards with direct USB connection, the printf function supports print output. To enable print output using the Serial function, you need to enable the USB CDC On Boot feature or declare HWCDC
    • For development boards with UART to USB conversion, both printf and Serial functions support print output without enabling USB CDC On Boot
Q: How do I use SquareLine Studio to design interfaces?