Adding new sensor (serial port device)

Getting vendor ID

udevadm info -a -p $(udevadm info -q path -n /dev/<serial port name>) | grep idVendor | head -1

Output:

ATTRS{idVendor}=="1546"

Getting product ID

udevadm info -a -p $(udevadm info -q path -n /dev/<serial port name>) | grep idProduct | head -1

Output:

ATTRS{idProduct}=="01a9"

Setting udev rules

Create file under /etc/udev/rules.d according to udev naming convention.

Files should be named xx-descriptive-name.rules, the xx should be chosen first according to the following sequence points:

• < 60 most user rules; if you want to prevent an assignment being overriden by default rules, use the := operator. These cannot access persistent information such as that from vol_id; these cannot access persistent information such as that from vol_id
• < 70 rules that run helpers such as vol_id to populate the udev db
• < 90 rules that run other programs (often using information in the udev db)
• >=90 rules that should run last

So for example, create file sudo nano /etc/udev/rules.d/55-your_sensor_name.rules with the following content. Choose if it’s ACM or USB interface.

KERNEL=="tty<ACM/USB>[0-9]*", SUBSYSTEM=="tty", ATTRS{idVendor}=="1546", ATTRS{idProduct}=="01a9", MODE="0666", SYMLINK="tty<your custom name>"