mirror of https://github.com/ARMmbed/mbed-os.git
19 lines
719 B
Markdown
19 lines
719 B
Markdown
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# `udev` rules for Mbed USB CDC device
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Before running `tests-usb_device-serial` test suite on Debian-based Linux
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distros, make sure to [update the `udev` rules][1] as follows:
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```bash
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sudo tee /etc/udev/rules.d/99-ttyacms.rules >/dev/null <<EOF
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ATTRS{idVendor}=="1f00" ATTRS{idProduct}=="2013", ENV{ID_MM_DEVICE_IGNORE}="1"
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ATTRS{idVendor}=="1f00" ATTRS{idProduct}=="2012", ENV{ID_MM_DEVICE_IGNORE}="1"
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EOF
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sudo udevadm control --reload-rules
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```
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This will prevent the `ModemManager` daemon from automatically opening the port
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and sending the `AT commands`, which it does for every new `/dev/ttyACM` device
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registered in system.
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[1]: https://linux-tips.com/t/prevent-modem-manager-to-capture-usb-serial-devices/284
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