![]() Open the Device Manager by searching for it in the start menu.If Arduino IDE is not displaying a port for your board, you may still get some information by using a dedicated software utility: Windows While in bootloader mode, an orange LED will fade in and out.Ĭlick the button two times in succession.Ĭheck the board selector or Tools > Port again. Instead of running a sketch, the Arduino will wait until a sketch is uploaded. On some boards (such as those of the MKR Family and newer Nano boards), pressing the RESET button twice in quick succession will put the board in bootloader mode. The board may be stuck in a state where it cannot communicate on the port. Try a bootloader reset if your board supports it If you’re using a “clone” board with a CH340 USB chip, you may need to manually install CH340 drivers.If you’re using a classic Nano, install the FTDI drivers.Some boards require special drivers for serial communication: Remove any connections to the 0(RX) and 1(TX) pins when uploading code.If possible, connect the board directly to your computer instead of a through a hub.Try using a different USB port on your computer.Test your cable with a different device, or try using a different cable. Make sure the USB cable is not damaged.The board needs to be connected to your computer with a data USB cable.If you’ve determined that none of the listed ports belongs to your board, or of no ports are listed at all, check the following: Check board connectionsĪ common reason for the board not appearing on a port is a problem with the USB connection: If the Tools > Port menu is open, you need to close and re-open it for the list to refresh. If your board does not appear on any port In the pop-up “Select Other Board and Port” menu, select the board from the list.įor more information, see Select board and port in Arduino IDE. Select the “Unknown” board you want to use. If you’ve determined which port belongs to your board: The port your board is connected to should now appear as a new port in the list. If you’re using IDE 1, the board selector won’t be available. Then, use this procedure to see whether your board is being detected on any of the ports.ĭisconnect and reconnect your board to check its portĭisconnect your board from your computer. If you have many unidentified ports showing up in the list, consider disconnecting any boards and peripherals you don’t need from your computer. Some non-Arduino devices with generic USB chips.Ports that do not belong to an Arduino-compatible device, but are detected and shown by Arduino IDE anyway:.Various “clone” board with generic USB chips such as the CH340.The “classic” Arduino Nano, which uses a FTDI USB chip.Arduino-compatible boards that use generic USB chips:.The types of unidentified ports shown by Arduino IDE can be grouped in two categories: This example shows the board selector and Tools > Port menu on Windows when an Arduino UNO board and one other unidentified device is connected: In this case, it will appear as an “Unknown” device in the board selector and show only the port name in the Tools > Port menu. In some cases, the port information is not sufficient to determine the type of board that’s connected, or if the connected device is a compatible board at alL.In the Tools > Port menu, the board name will appear after the port name, enclosed by parentheses. If Arduino IDE is able to identify a device as an Arduino board, it will the board name instead of “Unknown” in the board selector. ![]() If there are “Unknown” devices in the board selector and without a board name in the Tools > Port menuĪrduino IDE will list detected serial ports in the board selector and Tools > Port menu. If your board does not appear on any port.If there are “Unknown” devices in the board selector and without a board name in the Tools > Port menu.If you’re using an Arduino-based “clone” board with a CH340 USB chip, you may need to manually install CH340 drivers.If you’re using a classic Arduino Nano, you may need to manually install FTDI drivers.Alternatively, select your board in the Tools > Board menu. When selecting an “Unknown” port you will be prompted to select the board type manually. Classic Nano boards and some clone boards with generic USB chips will show up as “Unknown” in the board selector.In earlier versions of Arduino IDE 2, the Tools > Port menu option would only be displayed if at least one device was detected on a port.Ensure you’ve connected your board with a working data USB cable.Learn what to do if your board is missing from the board selector or Tools > Port menu.
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