From 0d8060769aa24dcf4bd2f8fe30774ea252316a1b Mon Sep 17 00:00:00 2001
From: David Schroeder <david@schroedercity.com>
Date: Sun, 11 Sep 2022 14:41:46 -0500
Subject: [PATCH] Update powerwall.sh

---
 powerwall.sh | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/powerwall.sh b/powerwall.sh
index fae8aca0..4c43175d 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -111,16 +111,28 @@ CHECKTEMP_SERVICE(){
 }
 
 CHECKACV_SERVICE(){
-	last_temp=0
+	last_volt=0
 	while true
 	do
 		INPUTACV=$(curl -s "http://10.10.0.61/stats.json" | jq '.inputs .inV')
 		datetime=`date +'%Y-%m-%d %H:%M:%S'`
+		volt_diff=$((${last_volt%.*} - ${INPUTACV%.*}))
+		[ $volt_diff -lt 0 ] && volt_diff=$(($volt_diff * -1))
 		if [ ${INPUTACV%.*} -ge ${min_volt} ]; then
 			echo "($datetime) normal voltage: ${INPUTACV}V"
+			if [ $volt_diff -gt 1 ]; then
+				echo -e "($datetime) Normal voltage detected\nVOLTAGE: ${INPUTACV}V" | mail -s "POWER NOMINAL AGAIN" $email_alert
+			if [ "$last_volt" = "0" ]; then
+				echo -e "($datetime) Normal voltage detected\nVOLTAGE: ${INPUTACV}V" | mail -s "Power Nominal" $email_alert
+			fi
+			last_volt=1
 		else
+			last_volt=${INPUTACV}
 			echo "($datetime) LOW voltage: ${INPUTACV}V"
-			echo -e "($datetime) Power off or low voltage detected\nVOLTAGE: ${INPUTACV}V" | mail -s "POWER OFF!!" $email_alert
+			if [ $volt_diff -gt 1 ] || [ "$last_volt" = "1" ]; then
+				echo -e "($datetime) Power off or low voltage detected\nVOLTAGE: ${INPUTACV}V" | mail -s "POWER ALERT - LOW POWER!!" $email_alert
+				
+			fi
 		fi
 	    sleep 30
 	done # &