Arm Mbed OS support forum

NUCLEO_F334R8 is not a supported MCU

Hi everyone,

I have a question regarding the support of the NUCLEO Board F334R8. I tried to build the example “mbed-os-example-blinky” but I get the following output:

argument -m/–mcu: NUCLEO_F334R8 is not a supported MCU. Supported MCUs are:

… followed by a list of all supported MCUs.

Is there a way to nevertheless include support for that board?

Thank you,

Hi Philipp,

Build system in Mbed Studio complains because NUCLEO_F334R8 target is no longer supported in Mbed OS 6. That board is supported by the following versions of Mbed OS:

  • 5.10
  • 5.11
  • 5.12
  • 5.13
  • 5.14
  • 5.15

mbed-os-example-blinky example is using Mbed OS 6+. We recommend downgrading to Mbed OS 5.15.X if you want to build for this board. Mbed Studio contains also examples for Mbed OS 5. You can find a blinky with Mbed OS 5 if you scroll down in the New Program creation dialog.

Arek Zaluski - Mbed Studio team

Hi Arek,

yep, downgrading did the trick! Thank you for your help!

  • Philipp
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