Triggering rule through the HTTP request

[benya]

@jkandasa said:

@benya For now there is no doc for REST API. You have to refer source code.

Are there any samples?
I need to pass credentials and trigger some operation.

Besides REST API, MyController supports any other IPC?
May I trigger operation from external app or shell script on the same host?

[benya]

Looks like I could replace client that pushes data through REST API with a rule that uses condition script.
Condition script could read external file and return true/false accordingly.

How often MyController executes condition script (linked to the rule)? Every 5sec?

[jkandasa]

@benya

Looks like I could replace client that pushes data through REST API with a rule that uses condition script.
Condition script could read external file and return true/false accordingly.

You can use operation to execute the script and configure your operation on timer/cron.

How often MyController executes condition script (linked to the rule)? Every 5sec?

Yes, Condition scripts executes 5 seconds once.

[benya]

Here is a sample REST API call that modifies MyController repository variable:

curl -X PUT -H "Content-Type: application/json" -d '{"key":"Var1","value":"222"}' "http://demo:demo@demo.mycontroller.org/mc/rest/variables"

[benya]

Looks like dummy sensor variable triggers rule much faster than repository variable.
How could I change sensor variable (referring by UID tag) through REST API?
Could you post sample HTTP payload?

[benya]

I figured how to set dummy sensor by script called through REST API.

I created "Set DummySensor" groovy script:

def uid = "DummySensor"
def value = "1"
def sensor = mcApi.uidTag().getByUid(uid).getResource()
sensor.setValue(value)
mcApi.sensor().sendPayload(sensor);

and call it through the REST API:

curl "http://admin:admin@localhost:9880/mc/rest/scripts/runNow?bindings=%7B+%7D&script=operations%2FSet+DummySensor.groovy&scriptBindings=%7B%7D"

I defined rule that gets triggered when dummy sensor value changes.
No 5 sec delays anymore. Cool!

[websterwong8]

I have been looking high and low to trigger sensors through HTTP Request. I have tried to understand from the source code link but failed. Is it possible to trigger a sensor using HTTP Request ?

[jkandasa]

@websterwong8 You can send a payload to sensors via HTTP.

For this, you can use send raw message API.

POST : https://demo.mycontroller.org/mc/rest/sensors/sendRawMessage

Data:

{
  "gatewayId": "39",
  "nodeEui": "1",
  "sensorId": "1",
  "type": "Set",
  "subType": "Status",
  "payload": "0",
  "ack": "0"
}

You can get gateway Id by editing gateway.

Let me know your specific use case. I can guide you.

[Daniele]

Sorry for replying to an old Post, but this is the only one I found about API calls.
I'd like to read & write some sensor variables from a python script, in order to integrate MyController with an external service.

Could you give some suggestion to handle the authentication?
I immagine that to read sensor variables I should change your json from send to request, correct?

Thanks for your amazing work
Daniele

[ncollins]

@Daniele This is an example for a node.js script that I use to pull back sensor data.

const https = require('https');

https.get({
	host: 'localhost' // host of your mycontroller install
	,port: 443 // this is 443 since it's SSL
	,path: '/mc/rest/sensors/264' // example getting sensor info for sensor 264
	,headers: {
		'Authorization': 'Basic ' + new Buffer('USERNAME:PASSWORD').toString('base64')
	}

}, (resp) => {
  let data = '';
  //console.log(resp);
  // A chunk of data has been recieved.
  resp.on('data', (chunk) => {
    data += chunk;
  });

  // The whole response has been received. Print out the result.
  resp.on('end', () => {
    console.log(JSON.parse(data).variables[0]);
  });

}).on("error", (err) => {
  console.log("Error: " + err.message);
}); 

Important thing to note is the Basic Auth header. This is how you send username and password.

The first google result I found for sending basic auth params in a python script
https://stackoverflow.com/questions/6999565/python-https-get-with-basic-authentication

import requests

r = requests.get('https://my.website.com/rest/path', auth=('myusername', 'mybasicpass'))
print(r.text)

[Daniele]

Thank you very much, this is exactly the kind of hint I needed!