Raspi Check CPU TEMP AND SPEED

#!/bin/bash

# cpustatus

#

# Prints the current state of the CPU like temperature, voltage and speed.

# The temperature is reported in degrees Celsius (C) while

# the CPU speed is calculated in megahertz (MHz).

function convert_to_MHz {

   let value=$1/1000

   echo "$value"

}

function calculate_overvolts {

   # We can safely ignore the integer

   # part of the decimal argument

   # since it's not realistic to run the Pi

   # at voltages higher than 1.99 V

   let overvolts=${1#*.}-20

   echo "$overvolts"

}

temp=$(vcgencmd measure_temp)

temp=${temp:5:4}

volts=$(vcgencmd measure_volts)

volts=${volts:5:4}

if [ $volts != "1.20" ]; then

   overvolts=$(calculate_overvolts $volts)

fi

minFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq)

minFreq=$(convert_to_MHz $minFreq)

maxFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq)

maxFreq=$(convert_to_MHz $maxFreq)

freq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)

freq=$(convert_to_MHz $freq)

governor=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)

echo "Temperature:   $temp C"

echo -n "Voltage:       $volts V"

[ $overvolts ] && echo " (+0.$overvolts overvolt)" || echo -e "\r"

echo "Min speed:     $minFreq MHz"

echo "Max speed:     $maxFreq MHz"

echo "Current speed: $freq MHz"

echo "Governor:      $governor"

exit 0