Update powerwall.sh

powerwall.sh

@@ -324,7 +324,7 @@ Previous Temp: ${last_temp[${SENSOR}]}${GAUGESH}"
 									echo -e "($(date +'%Y-%m-%d %H:%M:%S')) - ${temp_f}${GAUGESH} - ${SENSOR} - Back to NORMAL ${GAUGE}" >> ${PW_LOGFILE}
 									# [ "$(compgen -G "${PW_TMPFOLDER}/power.*.off")" != "" ] && rm -f ${PW_TMPFOLDER}/power.*.off
 				
-								elif (( $(bc <<< "${last_temp[${SENSOR}]} = 0") )); then
+								elif [ "${last_temp[${SENSOR}]}" == "0" ]; then
 									echo 4
 									# SENDNOTICE "${SENSOR} TEMP NORMAL" "Service Startup
 # NORMAL TEMP: ${temp_f}${GAUGESH}"