USB

Fix port usb Digitemp read Temperature, find out where the link find to ttyUSB0 or ttyUSB1

[root@rock rules.d]# ls -l /dev/serial/by-id/
total 0
lrwxrwxrwx 1 root root 13 Jun  1 02:53 usb-Prolific_Technology_Inc._USB-Serial_Controller-if00-port0 -> ../../ttyUSB1
lrwxrwxrwx 1 root root 13 Jun  1 02:53 usb-Silicon_Labs_CP2102N_USB_to_UART_Bridge_Controller_2c67e783c72aea119cabbdfad0cd4f36-if00-port0 -> ../../ttyUSB0

If we use path to find out which USB belong to Digitemp in this case was platform-xhci-hcd.0.auto-usb-0:1.1:1.0-port0 ../../ttyUSB2

[jpc@rock ~]$ ls /dev/serial/by-path/ -l
total 0
lrwxrwxrwx 1 root root 13 Jul  3 02:53 platform-xhci-hcd.0.auto-usb-0:1.1:1.0-port0 -> ../../ttyUSB2
lrwxrwxrwx 1 root root 13 Jul  3 02:53 platform-xhci-hcd.0.auto-usb-0:1.4:1.0-port0 -> ../../ttyUSB1
lrwxrwxrwx 1 root root 13 Jul  3 02:53 platform-xhci-hcd.1.auto-usb-0:1:1.0-port0 -> ../../ttyUSB0
[jpc@rock ~]$ 

Then, we config /etc/digitemp.conf to point to softlink file ttyUSB1. In this case, point to usb-Prolific_Technology_Inc.

[jpc@rock ~]$ cat /etc/digitemp.conf
#TTY /dev/ttyUSB1
#TTY /dev/serial/by-id/usb-Prolific_Technology_Inc._USB-Serial_Controller-if00-port0
TTY /dev/serial/by-path/platform-xhci-hcd.0.auto-usb-0:1.1:1.0-port0

READ_TIME 1000
LOG_TYPE 1
LOG_FORMAT "%b %d %H:%M:%S Sensor %s C: %.2C F: %.2F"
CNT_FORMAT "%b %d %H:%M:%S Sensor %s #%n %C"
HUM_FORMAT "%b %d %H:%M:%S Sensor %s C: %.2C F: %.2F H: %h%%"
SENSORS 1
ROM 0 0x28 0xFF 0x64 0x1E 0x39 0xE1 0x30 0x34
[jpc@rock ~]$

We can read Temperatue with

[jpc@rock ~]$ digitemp_DS9097 -a -q -c /etc/digitemp.conf
Jun 01 21:04:18 Sensor 0 C: 28.00 F: 82.40
[jpc@rock ~]$

USB FIFINE Microphones FIFINE K670

list record capture hardware

[krit@mini tmp]$ arecord --list-devices
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC257 Analog [ALC257 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Microphone [FIFINE K670 Microphone], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Since usb mic FIFINE on card 1 subdevice 0, we put hw:1,0 in following

arecord -f cd -D hw:1,0 -d 3 test.wav
aplay -f cd test.wav

Record my desktop with specific input mic hardware

recordmydesktop --device hw:1,0