Arduino Serial Port Detection Report | Generated by AI
Here’s the full report:
Arduino Connection Report
How I Checked
ls /dev/cu.* /dev/tty.*— Listed all serial/character devices on macOS and filtered forusb/arduino/serialpatterns. This is the primary detection method.ioreg -c IOSerialBSDClient— Queried the macOS I/O Registry to get kernel-level driver info about the serial device.stat+lsof— Checked device file metadata and whether any process is currently using the port.
Findings
| Property | Value |
|---|---|
| Callout device | /dev/cu.usbserial-1110 |
| Dialin device | /dev/tty.usbserial-1110 |
| TTY suffix | 1110 (last 4 digits of USB serial number) |
| Connected at | 2026-05-03 23:30:19 |
| Permissions | crw-rw-rw- (readable/writable by all users) |
| Driver | IOSerialBSDClient (Apple serial family) |
| Port status | Not in use (no process has it open) |
| Chip type | Likely CH340 (clone Uno) or FTDI — suffix usbserial indicates a USB-to-UART bridge |
Notes
- Use
/dev/cu.usbserial-1110to upload sketches or read serial output - Default Arduino baud rate is
9600 tty.*is for incoming connections;cu.*(call-up) is what you use for outgoing/Arduino communicationsystem_profiler SPUSBDataTypereturned empty — likely an M-series Mac limitation with the USB subsystem reporting