# Show Serial Number and Firmware Version

**URL:** <https://discourse.chair.audio/t/show-serial-number-and-firmware-version/39>\
**Category:** Linux\
**Created:** [December 17, 2019, 6:34pm UTC](https://discourse.chair.audio/t/show-serial-number-and-firmware-version/39 "2019-12-17T18:34:05Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Max](https://discourse.chair.audio/user_avatar/discourse.chair.audio/max/32/12_2.png) [@Max](https://discourse.chair.audio/u/Max)\
**Post date:** [December 17, 2019, 6:34pm UTC](https://discourse.chair.audio/t/show-serial-number-and-firmware-version/39/1 "2019-12-17T18:34:05Z")

</div>

First, find out the device and bus numbers like this:

```
lsusb | grep tickle
Bus 003 Device 046: ID 04b4:bef0 Cypress Semiconductor Corp. tickle

```

then use the numbers from above to show the serial number:

```
udevadm info -a -n bus/usb/003/046 | grep ATTR{serial}
     ATTR{serial}=="-------------------"

```

and the firmware version:

```
udevadm info -a -n bus/usb/003/046 | grep ATTR{bcdDevice}
    ATTR{bcdDevice}=="0x3c"

```

This is the firmware version in hexadecimal, so 00.60 in decimal.

[Check if you have the newest firmware available](https://discourse.chair.audio/t/tickle-firmware-update/36)