diff --git a/debug-level-conf/root-crontab b/debug-level-conf/root-crontab
index 711161a..721d15e 100644
--- a/debug-level-conf/root-crontab
+++ b/debug-level-conf/root-crontab
@@ -1,3 +1,3 @@
 # m h  dom mon dow   command
-# set hardware I2C RTC every 5 minutes
-*/5 * * * * bash -c "/usr/sbin/hwclock -w 2>> /var/log/root-crontab.log"
+# set hardware I2C RTC hourly
+0 * * * * bash -c "/usr/sbin/hwclock -w 2>> /var/log/root-crontab.log"
diff --git a/installer3.sh b/installer3.sh
index 54f183f..0d52336 100644
--- a/installer3.sh
+++ b/installer3.sh
@@ -68,10 +68,12 @@ fi
 ## self
 echo "Giving  $username the right permissions..."
 sudo usermod -aG dialout $username
+sudo usermod -a -G i2c $username
 ## service users
 echo "Giving service users the right permissions..."
 sudo usermod -aG dialout gpsd
 sudo usermod -aG dialout _chrony
+sudo usermod -a -G i2c _chrony
 
 echo "installer3.sh complete" >> ./status.txt