Projekt: Alexa Custom Skill mit Node-RED umsetzen
Nachdem ich jetzt lange Alexa-FHEM laufen hatte (Smart Home Skill und Custom Skill), haben mich nach wie vor ein paar Dinge gestört. Zum einen habe ich einen ReverseProxy laufen, welcher schön mit Fail2Ban usw. abgesichert ist und mit einem echten Zertifikat läuft (alexa-fhem läuft mit einem selbst signierten) - es wäre doch irgendwie sinnvoll, alles über einen Zugang von außen ins Netzwerk zu lassen, oder? Und zum anderen dass ich so viel drumrum brauche, was ich gar nicht nutze. Klar, der Smart Home Skill ist ganz nett, aber benutze ich halt nicht. Daher kann ich auch direkt meine eigene Logik auf die Beine stellen mit Node-RED. Und das machen wir jetzt hier. Im Ergebnis haben wir einen komplett unabhängigen Custom Skill, welcher vollständig in Node-RED umgesetzt wird.
Was Du brauchst?
- Eine Node-RED-Installation
- Einen laufenden ReverseProxy
- Einen Amazon Echo
»Node-RED über ReverseProxy«
Video
Befehle
Hier die Lamdba-Funktion. Ziel ist natürlich deine Domain inkl. ReverseProxy. Ich habe noch eine Basic-Authentication davor, welche im Header angepasst werden muss. Also noch eine Stufe sicherer.
Der Authorization-Header ist natürlich base64 kodiert
const https = require('https');
exports.handler = (event, context, callback) => {
var options = {
hostname: 'fhem.deinhostname.com',
path: '/alexa',
port: 443,
method: 'POST',
rejectUnauthorized: false,
headers: {
'Content-Type': 'application/json',
'Authorization': 'Basic .....=='
}
};
const req = https.request(options, (res) => {
let body = '';
console.log('Status:', res.statusCode);
console.log('Headers:', JSON.stringify(res.headers));
res.setEncoding('utf8');
res.on('data', (chunk) => body += chunk);
res.on('end', () => {
console.log('Successfully processed HTTPS response');
body = JSON.parse(body);
callback(null, body);
});
});
req.on('error', callback);
req.write(JSON.stringify(event));
req.end();
};
Hier noch mein Flow zum importieren:
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response","z":"bf5eeb85.d24f28","name":"Alexa","statusCode":"","headers":{},"x":570,"y":300,"wires":[]},{"id":"e52376ad.0a7718","type":"json","z":"bf5eeb85.d24f28","name":"zu JSON","property":"payload","action":"","pretty":false,"x":420,"y":300,"wires":[["9ac1417c.88ab2"]]},{"id":"b7625b91.4944b8","type":"template","z":"bf5eeb85.d24f28","name":"Nicht verstanden","field":"payload","fieldType":"msg","format":"json","syntax":"plain","template":"{\n \"version\": \"1.0\",\n \"response\": {\n \"outputSpeech\": {\n \"type\": \"SSML\",\n \"ssml\": \"<speak>Das habe ich nicht verstanden. <amazon:effect name=\\\"whispered\\\">ist wohl blöd programmiert</amazon:effect></speak>\"\n },\n \"shouldEndSession\": true\n }\n}","x":210,"y":340,"wires":[["e52376ad.0a7718"]]},{"id":"7a3488dc.35c468","type":"switch","z":"bf5eeb85.d24f28","name":"Request 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