# cat /etc/udev/rules.d/90-co2mini.rules
ACTION=="remove", GOTO="co2mini_end"

SUBSYSTEMS=="usb", KERNEL=="hidraw*", ATTRS{idVendor}=="04d9", ATTRS{idProduct}=="a052", GROUP="plugdev", MODE="0660", SYMLINK+="co2mini", GOTO="co2mini_end"

LABEL="co2mini_end"
$ crontab -l
#for bak arp
@daily cd ~/arp ; ./arp-dl.sh
# for speedtest
@midnight cd ~/speedtest ; ./speedtest-header.sh
1,3,5,7,9 */2 * * * cd ~/speedtest ; ./speedtest-measure.sh

#co2 measurement
*/3 *   * * *   /home/username/co2/bin/monitor.py /dev/co2mini