Kamera Hacking macht Spaß

Seit ein paar Wochen ist eine Edimax Kamera bei mir im Einsatz und es fallen mir immer wieder neue Sachen hierzu ein. Es ist unheimlich spannend was in Kombination mit einem Raspberry Pi, Node-Red, UNIX-Scripts so alles möglich ist.

Als erstes haben mich die CGI-Remote Befehle interessiert, da die Kamera via IoT, MQTT und Smarthome unabhängig gesteuert werden soll, um nicht die Software des Hersteller nehmen zu müssen.

Es gab hierzu echt ein paar sehr interessante Ergebnisse die hier im Blog dokumentiert sind :

Edimax Kamera mit MQTT steuern

In Verbindung mit Node-Red und ein wenig UNIX-Shellscripts kann man wirklich sehr interessante Dinge machen. Zum Beispiel Bilder der Kamera als Snapshot an Twitter zu senden. Die werden dann über einen Crontab Mechanismus via Node-Red angesteuert und automatisiert an Twitter gesendet.

Die Anleitung hierzu gibt es hier: Webcam Bilder mit Raspberry Pi an Twitter senden

Nun kam eine weitere Idee hinzu, alle 15 Minuten automatisiert ein Bild (Snapshot) von der Kamera aufzunehmen, welches dann auf ein NAS-Storage gespeichert wird und zusätzlich per FTP an einen FTP-Server.

Der erste Akt mit dem Snapshot auf ein NAS-Storage ist sehr einfach gelöst, da die Kamera in den Einstellungen die Möglichkeit hat, ein SMB-Fileshare einzubinden. Der Befehl hierzu ist wie folgt:

"wget -O /tmp/snapshot.txt http://admin:1234@192.168.2.1/camera-cgi/admin/recorder.cgi?action=snapshot

Wenn die Anmeldedaten stimmen und die IP-Adresse, kann man einfach in einer Linux-Shell diesen oben angezeigten Befehl kopieren und ENTER drücken. Die Kamera macht dann ein Snapshot auf dass von dem eingestellten Speichermedium zb. Speicherkarte, oder NAS-Storage.

So sieht dann die Verzeichnisstruktur aus wenn die Bilder gespeichert werden.

Nun verbinden wir den oben gezeigten Befehl mit Node-Red wie folgt:

[{"id":"20d83420.f421f4","type":"inject","z":"4bbf54b9.3f94dc","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"*/15 0-22 * * *","once":false,"x":263.88330078125,"y":205,"wires":[["beb64a0.07e90b8"]]},{"id":"beb64a0.07e90b8","type":"exec","z":"4bbf54b9.3f94dc","command":"wget http://admin:1234@192.168.2.1/jpg/image.jpg -O /home/pi/webcams/wohnzimmer/wohnzimmer.jpg","addpay":false,"append":"","useSpawn":"","timer":"","name":"Snapshot","x":551.88330078125,"y":204,"wires":[["6bd99122.6ac518"],[],[]]},{"id":"573399e1.7acec","type":"function","z":"4bbf54b9.3f94dc","name":"Test Function 5","func":"if (msg.payload == \"Snapshot\") {\n return [ msg, null, null, null, null ];\n} else if (msg.payload == \"Inside\") {\n return [ null, msg, null, null, null ];\n} else if (msg.payload == \"InsideFTP\") {\n return [null, null, msg, null, null];\n} else if (msg.payload == \"Cam4\") {\n return [null, null, null, msg, null];\n} else {\n return [null, null, null, null, msg];\n}\n\n","outputs":"5","noerr":0,"x":267.88330078125,"y":301,"wires":[["71e0772f.264b7","f704e77d.3ec658"],["71e0772f.264b7","77606f6e.ada608"],["71e0772f.264b7","beb64a0.07e90b8"],["71e0772f.264b7"],["71e0772f.264b7"]]},{"id":"6bd99122.6ac518","type":"debug","z":"4bbf54b9.3f94dc","name":"","active":true,"console":"false","complete":"false","x":881.88330078125,"y":191.7833251953125,"wires":[]},{"id":"71e0772f.264b7","type":"debug","z":"4bbf54b9.3f94dc","name":"","active":true,"console":"false","complete":"false","x":799.88330078125,"y":296.1166687011719,"wires":[]},{"id":"4f83e0e9.c8d488","type":"mqtt in","z":"4bbf54b9.3f94dc","name":"","topic":"cam","qos":"2","broker":"191d04ca.0c7d13","x":93.88330078125,"y":301,"wires":[["573399e1.7acec"]]},{"id":"f704e77d.3ec658","type":"exec","z":"4bbf54b9.3f94dc","command":"wget -O /tmp/snapshot.txt wget http://admin:password@192.168.2.1/camera-cgi/admin/recorder.cgi?action=snapshot","addpay":false,"append":"","useSpawn":"","timer":"20","name":"Snapshot on Storage","x":597.88330078125,"y":90.99999237060547,"wires":[[],[],[]]},{"id":"77606f6e.ada608","type":"exec","z":"4bbf54b9.3f94dc","command":"wget http://admin:1234@192.168.2.1/jpg/image.jpg -O /home/pi/webcams/wohnzimmer/wohnzimmer.jpg","addpay":false,"append":"","useSpawn":"","timer":"","name":"Take Photo","x":565,"y":144.88330078125,"wires":[["385d6b0e.61ba84"],[],[]]},{"id":"4ba9dc04.feb0ec","type":"inject","z":"4bbf54b9.3f94dc","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"*/15 0-22 * * *","once":false,"x":263.88330078125,"y":93,"wires":[["f704e77d.3ec658"]]},{"id":"385d6b0e.61ba84","type":"file in","z":"4bbf54b9.3f94dc","name":"Read locale Photo","filename":"/home/pi/webcams/wohnzimmer/wohnzimmer.jpg","format":"","x":789,"y":132.88330078125,"wires":[["17db7b2b.f8cbfd"]]},{"id":"a58b9ac5.2cb0e8","type":"inject","z":"4bbf54b9.3f94dc","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"x":266.0000305175781,"y":144.88330078125,"wires":[["77606f6e.ada608"]]},{"id":"17db7b2b.f8cbfd","type":"change","z":"4bbf54b9.3f94dc","name":"","rules":[{"t":"set","p":"media","pt":"msg","to":"payload","tot":"msg"},{"t":"set","p":"payload","pt":"msg","to":"Current Photoshoot Inside","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":1025,"y":132.88330078125,"wires":[["91915da2.530c8"]]},{"id":"91915da2.530c8","type":"twitter out","z":"4bbf54b9.3f94dc","twitter":"","name":"Tweet","x":1206,"y":132.88330078125,"wires":[]},{"id":"191d04ca.0c7d13","type":"mqtt-broker","z":"","broker":"mqtt.unixweb.de","port":"1883","clientid":"","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willPayload":"","birthTopic":"","birthQos":"0","birthPayload":""}]

[{"id":"a9d46366.097b78","type":"exec","z":"4bbf54b9.3f94dc","command":"/home/pi/bin/ftp.sh ","addpay":false,"append":"","useSpawn":"","timer":"","name":"FTP Upload","x":802.88330078125,"y":415.1665954589844,"wires":[["ba23f689.ec4448"],[],[]]},{"id":"e4e8f1ef.3fd","type":"watch","z":"4bbf54b9.3f94dc","name":"Wohnzimmer","files":"/home/pi/webcams/wohnzimmer","x":502.88330078125,"y":412.1999206542969,"wires":[["a9d46366.097b78"]]},{"id":"ba23f689.ec4448","type":"debug","z":"4bbf54b9.3f94dc","name":"","active":true,"console":"false","complete":"false","x":1055.88330078125,"y":400.5500183105469,"wires":[]}]

#!/bin/bash
#set -x
DATE=$(date +%d-%m-%y)
DATEFILE=`cat /tmp/date.txt`
FILE=backup_`date +%Y%m%d_%H%M%S`.jpg

            if [ "$DATE" = "$DATEFILE" ]; then
        echo put /home/pi/webcams/wohnzimmer/wohnzimmer.jpg /$DATE/$FILE |ftp ftp.<meinserver>.de
            else
            echo $DATE > /tmp/date.txt
        echo mkdir $DATE |ftp ftp.<meinserver>.de
        echo put /home/pi/webcams/wohnzimmer/wohnzimmer.jpg /$DATE/$FILE |ftp ftp.<meinserver>.de
            fi

cat .netrc
machine <ftp.meinserver.de>
login <login@meinserver.de>
password <Dein Passwort>

Viel Spaß wünscht weiterhin , Joachim