Raspberry Pi throttling checker with temperature and voltage measurements. Voltage colors will be accurate for Pi3B+/Zero 2W, maybe Zero, not Pi4

nuthrottle.sh

#!/bin/bash

#Flag Bits
UNDERVOLTED=0x1
CAPPED=0x2
THROTTLED=0x4
SOFT_TEMPLIMIT=0x8
HAS_UNDERVOLTED=0x10000
HAS_CAPPED=0x20000
HAS_THROTTLED=0x40000
HAS_SOFT_TEMPLIMIT=0x80000


#Text Colors
GREEN=`tput setaf 2`
RED=`tput setaf 1`
YELLOW=`tput setaf 3`
EMERG1=`tput setaf 91`
EMERG2=`tput setaf 127`
PLAID=`tput setaf 202`
BLUE=`tput setaf 27`
NC=`tput sgr0`

#Output Strings
GOOD="${GREEN}NO${NC}"
BAD="${RED}YES${NC}"

#Get Status, extract hex
STATUS=$(vcgencmd get_throttled)
STATUS=${STATUS#*=}

echo -n "Status: "
(($STATUS!=0)) && echo "${RED}${STATUS}${NC}" || echo "${GREEN}${STATUS}${NC}"

echo "Undervolted:"
echo -n "   Now: "
((($STATUS&UNDERVOLTED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_UNDERVOLTED)!=0)) && echo "${BAD}" || echo "${GOOD}"

echo "Throttled:"
echo -n "   Now: "
((($STATUS&THROTTLED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_THROTTLED)!=0)) && echo "${BAD}" || echo "${GOOD}"

echo "Frequency Capped:"
echo -n "   Now: "
((($STATUS&CAPPED)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_CAPPED)!=0)) && echo "${BAD}" || echo "${GOOD}"

echo "Softlimit:"
echo -n "   Now: "
((($STATUS&SOFT_TEMPLIMIT)!=0)) && echo "${BAD}" || echo "${GOOD}"
echo -n "   Run: "
((($STATUS&HAS_SOFT_TEMPLIMIT)!=0)) && echo "${BAD}" || echo "${GOOD}"

#Temps
tempc=$(vcgencmd measure_temp | cut -c 6-8 | cut -d '.' -f1)
echo -n "Temperature: "
if [[ "$tempc" -lt "60" ]]; then
  echo "$GREEN$tempc$NC°C"
elif [[ "$tempc" -lt "70" ]]; then
    echo "$YELLOW$tempc$NC°C"
elif [[ "$tempc" -lt "80" ]]; then
    echo "$RED$tempc$NC°C"
else [[ "$tempc" -gt "81" ]];
    if [[ "$tempc" -lt "100" ]]; then
      echo -e "\t$EMERG1 WARNING!$EMERG2 $tempc$RED°C$NC"
    fi
    echo -e "\t$EMERG1 Put the kettle on! You're over 100°C: $EMERG2$tempc°C to be precise."
fi

#Voltage
volt=$(vcgencmd measure_volts | cut -c 6-11)
echo -n "Voltage: "
if [[ "$volt" < "1.26" ]]; then
  echo "$BLUE$volt$NC V ($BLUE Undervolted $NC)"
elif [[ "$volt" < "1.36" ]]; then
    echo "$GREEN$volt$NC V"
elif [[ "$volt" < "1.46" ]]; then
    echo "$YELLOW$volt$NC V"
else [[ "$volt" > "1.7" ]];
    if [[ "$volt" < "1.8" ]]; then
      echo -e "\t$RED WARNING!$EMERG2 $volt$REDV$NC V"
    fi
    echo -e "\t$EMERG1 Put the kettle on! You're over 1.8V: $EMERG2$volt V to be precise."
fi