https://harlemsquirrel.github.io/shell/2019/01/05/monitoring-raspberry-pi-power-and-thermal-issues.html

01110000000000000010
||||            ||||_ Under-voltage detected
||||            |||_ Arm frequency capped
||||            ||_ Currently throttled
||||            |_ Soft temperature limit active
||||_ Under-voltage has occurred since last reboot
|||_ Arm frequency capped has occurred
||_ Throttling has occurred
|_ Soft temperature limit has occurred