logtemp

#!/bin/bash

#######################################################################
# Made by    : Ewoud Dronkert
# Licence    : GNU GPL v3
# Platform   : Raspberry Pi
# Requires   : Raspbian, Bash
# Location   : ~/bin/
# Name       : logtemp
# Version    : 1.0.0
# Date       : 2015-11-02
# Purpose    : Log CPU temperature as long there is disk space
# Parameters : none
# Exit     0 : out of disk space
#######################################################################

LOGDIR=/home/pi  # Where to save logging files
INTERVAL=10      # Logging interval in seconds
DISKLIMIT=512    # Free space in MB that must be available for logging to continue

space () {
	MB=$(df -BM --total "$LOGDIR" | grep total | xargs | cut -d" " -f2 | cut -dM -f1)
	[ $MB -ge $DISKLIMIT ] && return 0
	return 1
}

while space; do
	DATE=$(date +"%Y%m%d")
	TIME=$(date +"%H:%M:%S")

	# Requires bc (install from repository: sudo apt-get install bc)
	#MILLI=$(cat '/sys/class/thermal/thermal_zone0/temp')
	#TEMP=$(echo "scale=3;$MILLI/1000" | bc)

	# Requires vcgencmd (available on standard Raspbian)
	TEMP=$(vcgencmd measure_temp | cut -d= -f2 | cut -d\' -f1)

	echo "\"$TIME\",$TEMP" >> $LOGDIR/temp-$DATE.csv
	sleep $INTERVAL
done
exit 0