From cf4f3da7ab035641448eaa6e11048df6a55a71b2 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Wed, 26 Aug 2020 14:34:24 +0200
Subject: [PATCH] check if we got temperature from kernel

---
 w1-ds18b20-influx.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/w1-ds18b20-influx.sh b/w1-ds18b20-influx.sh
index a3ba047..74e32bf 100755
--- a/w1-ds18b20-influx.sh
+++ b/w1-ds18b20-influx.sh
@@ -7,7 +7,7 @@ influx=/dev/shm/temp.influx
 
 ls /sys/bus/w1/devices/w1_bus_master*/*-*/w1_slave | while read path ; do
 	temp=$( cat $path | grep t= | cut -d= -f2 )
-	if [ $temp -ne 85000 ] ; then # 85 is error
+	if [ ! -z "$temp" -a $temp -ne 85000 ] ; then # 85 is error
 		temp=$( echo $temp | awk '{ printf "%.3f\n", $1 / 1000 }' )
 		id=$( echo $path | cut -d/ -f 7 )
 		name=$( grep "^$id" id2name.txt | cut -d' ' -f2 )
-- 
2.20.1