inverter_tasmota_arbeitszimmer.sh
#!/bin/bash

#set Inverter/Tasmota IPs
IPINVERTER="192.168.178.55"
IPTASMOTA="192.168.178.61"

#get timestamp YYYY-MM-DD HH24:MI
TIMESTAMP=`date +'%Y-%m-%d %H:%M'`

#set start/stop values for month XY
MONTH=`date +'%m'`
if [[ ${MONTH} == "09" ]]
then
        START_VALUE="-1800";
        STOP_VALUE="0";
elif [[ ${MONTH} == "10" ]]
then
        START_VALUE="-1600";
        STOP_VALUE="50";
elif [[ ${MONTH} == "11" ]]
then
        START_VALUE="-1400";
        STOP_VALUE="100";
elif [[ ${MONTH} == "12" ]]
then
        START_VALUE="-1200";
        STOP_VALUE="150";
else
        START_VALUE="-2500";
        STOP_VALUE="-500";
fi


#set & create log file with header if not exists
LOG_FILE=/home/pi/inverter_tasmota_arbeitszimmer.log
if [[ ! -f ${LOG_FILE} ]]
then
        echo "Timestamp;IP Inverter;PowerReal_P_Sum;IP Tasmota;Tasmota Power State;Start Value;Stop Value;Message;Loop T;Loop I" > ${LOG_FILE};
fi

#get PowerValue from Inverter API & format output, loop if tasmota is unreachable
LOOP_I=0
PowerReal_P_Sum=`curl -s http://${IPINVERTER}/solar_api/v1/GetMeterRealtimeData.cgi |grep -i "PowerReal_P_Sum" |tr -s " " |cut -d ":" -f2 |sed 's/,//g' |sed 's/^ //g'| cut -d $(locale decimal_point) -f1`
while [[ -z ${PowerReal_P_Sum} ]]
do
        if [[ ${LOOP_I} -eq 3 ]]
        then
		MESSAGE="No Connection to Inverter when getting PowerReal_P_Sum";
                echo "${TIMESTAMP};${IPINVERTER};${PowerReal_P_Sum};${IPTASMOTA};${TASMOTA_POWER_STATE};${START_VALUE};${STOP_VALUE};${MESSAGE};${LOOP_T};${LOOP_I}" >> ${LOG_FILE};
                exit 1;
        fi

        let LOOP_I++;
        sleep 10;
        PowerReal_P_Sum=`curl -s http://${IPINVERTER}/solar_api/v1/GetMeterRealtimeData.cgi |grep -i "PowerReal_P_Sum" |tr -s " " |cut -d ":" -f2 |sed 's/,//g' |sed 's/^ //g'| cut -d $(locale decimal_point) -f1`;
done

#get tasmota state & format output, loop if tasmota is unreachable
LOOP_T=0
TASMOTA_POWER_STATE=`curl -s http://${IPTASMOTA}/cm?cmnd=Power | sed 's/{//g' | sed 's/}//g' |sed 's/"//g' |cut -d ":" -f2`
while [[ -z ${TASMOTA_POWER_STATE} ]]
do
	if [[ ${LOOP_T} -eq 3 ]]
	then
		MESSAGE="No Connection to Tasmota when getting Power State";
		echo "${TIMESTAMP};${IPINVERTER};${PowerReal_P_Sum};${IPTASMOTA};${TASMOTA_POWER_STATE};${START_VALUE};${STOP_VALUE};${MESSAGE};${LOOP_T};${LOOP_I}" >> ${LOG_FILE};
		exit 1;
	fi
	
	let LOOP_T++;
	sleep 10;
	TASMOTA_POWER_STATE=`curl -s http://${IPTASMOTA}/cm?cmnd=Power | sed 's/{//g' | sed 's/}//g' |sed 's/"//g' |cut -d ":" -f2`;
done

#set new tasmota state
if [[ ${TASMOTA_POWER_STATE} = "OFF" ]] && [[ ${PowerReal_P_Sum} -lt ${START_VALUE} ]]
then
	STATE="ON";
elif [[ ${TASMOTA_POWER_STATE} = "ON" ]] && [[ ${PowerReal_P_Sum} -gt ${STOP_VALUE} ]]
then
	STATE="OFF";
else
	STATE="LEAVE";
fi
	
#turn tasmota on/off or let it in actual state, loop if tasmota is unreachable
if [[ ${STATE} == "ON" ]] || [[ ${STATE} == "OFF" ]]
then
	MESSAGE="Tasmota, turn it ${STATE}";
	LOOP_T=0;
	TASMOTA_SWITCH=`curl -s "http://${IPTASMOTA}/cm?cmnd=Power%20${STATE}"`;
	while [[ -z ${TASMOTA_SWITCH} ]]
	do
		if [[ ${LOOP_T} -eq 3 ]]
		then
			MESSAGE="No Connection to Tasmota when setting Power State ${STATE}";
			echo "${TIMESTAMP};${IPINVERTER};${PowerReal_P_Sum};${IPTASMOTA};${TASMOTA_POWER_STATE};${START_VALUE};${STOP_VALUE};${MESSAGE};${LOOP_T};${LOOP_I}" >> ${LOG_FILE};
			exit 1;
		fi

		let LOOP_T++;
		sleep 10;
		TASMOTA_SWITCH=`curl -s "http://${IPTASMOTA}/cm?cmnd=Power%20${STATE}"`;
	done
elif [[ $STATE == "LEAVE" ]]
then
	MESSAGE="Tasmota, don't change Power State (${STATE})";
else
	MESSAGE="unknown state: ${STATE}";
fi

#write log
echo "${TIMESTAMP};${IPINVERTER};${PowerReal_P_Sum};${IPTASMOTA};${TASMOTA_POWER_STATE};${START_VALUE};${STOP_VALUE};${MESSAGE};${LOOP_T};${LOOP_I}" >> ${LOG_FILE}

exit 0