Re: how to attach umodem0 to something cu can use

On Wed, Apr 22, 2026 at 11:04:32PM -0700, Mark Millard wrote:
>On 4/22/26 18:47, void wrote:
>>
>> what device name does it use?
>
>macOS:
>Path: /dev/cu.usbmodemFD132
>It identifies it with the text: Debug Probe (CMSIS-DAP) #2
>Driver ID: com.apple.driver.usb.cdc.acm

How were you able to tell it was associated with /dev/cu.usbmodemFD132 ?
Was that in dmesg on the mac?

On my (stable/15) desktop it was associated with umodem0 in dmesg.
But I could not find a way to tell 'cu' about it. At the time,
I looked for /dev/umodem0 in /dev and couldn't find it. So
cu -l umodem0 -s 115200 errored.

I also don't know if it gets automatically linked with /dev/cuaU0

>> Eventually I tried from a debian laptop and changed port on the probe,
>> then used
>> i think it was procomm with the device name that was emitted when the probe
>> was plugged in, booted the pi5 and output was produced.

I've worked around the issue for the time being by using Debian, but i'd really 
like this to work on FreeBSD as that is my main desktop.
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