Dear all ,
I have application php/html , I want to read (via AJAX ) value of sensor via node red ?
Someone has idea how to read value sensor via AJAX ?
thanks
You posted in the incorrect area of the forum.
If I understand it correctly, you want to read a sensor value from your php application. You can accomplish this by setting up an http endpoint. In the documentation you will find the “cookbook” with examples. It comes down to: setup a certain url, get the sensor value, set that as a response.
I want send data to my private dashbord without node red
I want read data sensor via node red and send it to my private dashbord(in php /html)
[{"id":"2c536f36.9fef7","type":"tab","label":"Flow 12","disabled":false,"info":""},{"id":"fae77e41.e4291","type":"inject","z":"2c536f36.9fef7","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"1","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"power\":500,\"cosphi\":0.98,\"status\":\"ok\"}","payloadType":"json","x":140,"y":100,"wires":[["97e88997.b95288"]]},{"id":"97e88997.b95288","type":"http request","z":"2c536f36.9fef7","name":"","method":"POST","ret":"txt","paytoqs":"ignore","url":"localhost:1880/test/energie","tls":"","persist":false,"proxy":"","authType":"","x":360,"y":120,"wires":[["1db0a089.213b5f"]]},{"id":"1db0a089.213b5f","type":"debug","z":"2c536f36.9fef7","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":560,"y":160,"wires":[]}]
As said, you can do this with a http end-point;
- update the sensor data as a flow variable
- set up an end-point which retrieves the flow variable and expose it to an url.
example flow
[{"id":"e8ab1382.d91dc","type":"http in","z":"2c536f36.9fef7","name":"","url":"/test","method":"get","upload":false,"swaggerDoc":"","x":202,"y":288,"wires":[["c00327db.80111"]]},{"id":"c77d0d3a.702e6","type":"http response","z":"2c536f36.9fef7","name":"","statusCode":"","headers":{"content-type":"application/json"},"x":530,"y":288,"wires":[]},{"id":"1b528541.50d223","type":"inject","z":"2c536f36.9fef7","name":"Sensor data input","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"{\"power\":500,\"cosphi\":0.98,\"status\":\"ok\"}","payloadType":"json","x":234,"y":216,"wires":[["3a483e00.946312"]]},{"id":"3a483e00.946312","type":"change","z":"2c536f36.9fef7","name":"","rules":[{"t":"set","p":"sensor","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":442,"y":216,"wires":[[]]},{"id":"c00327db.80111","type":"change","z":"2c536f36.9fef7","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"sensor","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":368,"y":288,"wires":[["c77d0d3a.702e6"]]}]
- Press the inject node.
- Open a browser tab and go to
http://<yournode-red-ip:1880>/test/
You will get the json output, this url you can use in your custom html application
1 Like
thanks for your reply 
it is working fine 
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