Raspberry Pi temperature monitor

rpi.temperature.sh

#!/bin/bash

printf '%(%Y-%m-%d %H:%M:%S)T\n' -1

# Note rPi CPU and GPU are on the same chip, and GPU don't hanve any separate temperature sensor
# vcgencmd and sysfs provide the same data

cpu_temp_sysfs=$(</sys/class/thermal/thermal_zone0/temp)
echo "vcgencmd => $(vcgencmd measure_temp | grep  -o -E '[[:digit:]].*')"
echo "sysfs => $((cpu_temp_sysfs/1000))'C"

# watch -c -b -d  -n 1 -- './temperature.sh'