e3dc easy connect wallbox use key to enable / disable charging

[creatronics-de]

I wanted to be able to use the key to switch between pv and off so I did some work:

first there is the file e3dcKeyCheck.sh
replace xxx with the ip of your wallbox and yyy with the ip of your evcc

#!/bin/bash
/usr/bin/logger -i checking Key...
KEY=`modbus  -S xxx.xxx.xxx.xxx c@201`
echo $KEY
if [ $KEY != 1 ]
then
 curl -s -X POST http://yyy.yyy.yyy.yyy:7070/api/loadpoints/1/mode/off
 /usr/bin/logger -i Key is off, disabling charging
 rm -f /tmp/evcc_on
else
 if [ ! -f /tmp/evcc_on ]
 then
   curl -s -X POST http://yyy.yyy.yyy.yyy:7070/api/loadpoints/1/mode/pv
   touch /tmp/evcc_on
 fi
fi

copy the file e3dcKeyCheck.sh to /home/pi/scripte

e3dckey.service copy to /etc/systemd/system:

[Unit]
Description=E3DCKey
[Service]
ExecStart=/home/pi/scripte/e3dcKeyCheck.sh

e3dckey.timer copy to /etc/systemd/system:

[Unit]
Description=E3DCKey check every 2 seconds
[Timer]
OnBootSec=30
OnUnitActiveSec=30
AccuracySec=1ms
[Install]
WantedBy=timers.target`

run
sudo systemctl enable e3dckey.timer
to activate it

every thirty seconds, the key is checked and if in position 0, it is turned off.
once turned on, the system will only set the mode to pv once so you can change it afterwards to something different.

have fun!