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I've Plugged in a New TinyPICO but It Doesn't Show as a Serial Port

Problem​

When connecting a TinyPICO to a computer, it may not appear as a serial port.

Solution​

The issue is a missing USB driver. The specific driver needed depends on your board version:

  • TinyPICO V2: Uses a SiLabs CP2104 chip. You can grab the latest drivers from the SiLabs website.

  • TinyPICO V3: Uses a CH9102F chip. You can grab the latest drivers from the WCH website.

How to Identify Your Version​

Boards with a Blue power LED use the CH9102F chip (V3), and all others use the CP2104 chip (V2). V3 bags also have identification labels.

After Installation​

Once drivers are installed (restart your computer if needed), the board will appear as:

OSV2 (CP2104)V3 (CH9102F)
macOS/dev/tty.SLAB_USBtoUART/dev/tty.wchusbserialXXX
Linux/dev/ttyUSBx/dev/ttyACM0
WindowsCOMnCOMn

The TinyPICO will then be visible in the Arduino IDE and your system.

Last Updated: 2023