38 lines
823 B
Bash
38 lines
823 B
Bash
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#!/bin/bash
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GPIOPIN=4
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MINTEMP=-30
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MAXTEMP=40
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CMD="${PWD}/external/Adafruit_Python_DHT/examples/AdafruitDHT.py"
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OUTFILE="${PWD}/output"
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touch "$OUTFILE"
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CNT=0
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function read_sensor () {
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OUTPUT=`$CMD 22 $GPIOPIN`
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T=`echo "$OUTPUT" | awk -F[=*%] '{print $2}'`
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H=`echo "$OUTPUT" | awk -F[=*%] '{print $4}'`
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CNT=$(($CNT+1))
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echo "$CNT"
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}
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function check_output () {
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if [[ $OUTPUT =~ Fail ]] || [[ ! $OUTPUT =~ Temp ]] || [[ ! $OUTPUT =~ Humidity ]] || [ ${T%.*} -lt $MINTEMP ] || [ ${T%.*} -gt $MAXTEMP ]; then
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if [ $CNT -le 3 ]; then
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sleep 5
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read_sensor
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check_output
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else
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echo "Error" > "$OUTFILE"
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exit 0
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fi
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fi
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}
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read_sensor
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check_output
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echo `date +%s` > "$OUTFILE"
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echo "${T}" >> "$OUTFILE"
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echo "${H}" >> "$OUTFILE"
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