Intro to JSON for Node-RED

Learn the basics of JSON for the IoT. This video shows the structure and real-world use of JavaScript Object Notation or "JSON". Everything you need to know is covered: the different types of values that can be used, the required syntax, and how to reference specific properties. To bring it into the real world, Node-RED is used to show how easy it is to use JSON with live data from an API.

00:00 Introduction
01:21 Generic example
02:15 String value
02:52 Additional number properties
03:26 Boolean properties
03:59 The "no value" null keyword
04:46 Storing multiple values in ordered lists
05:35 Objects as values
06:19 Referring to sub-properties
06:51 Real-world weather data
07:38 Viewing JSON in "PrettyPrint"
08:15 Viewing JSON in the Node-RED debug pane
09:37 Grabbing a specific value
10:33 Getting the path to a sub-property
11:16 Getting data from arrays
12:14 Conclusion

Learn More:

More FREE online training

OpenWeatherMap tutorials:

All Opto 22 products are designed, manufactured, and supported in the U.S.A. from our Temecula, California headquarters and factory.
#api #nodered #node #groov #JSON #IoT #Tutorial #learnprogramming #programming #IIoT #automation #javascript

[krisdevoecht]

Good explanation, thanks.
Have made already something in node red but never understand completely how its really working, now whit your simple explanation it becomes clearer and clearer!

[kristian]

Thanks, I have needed this for a long time. So much time spent guessing how I get get a specific value, etc.

[MyImperfectEcoJourney]

Great video, really easy to understand and follow with the Open Weather API - got me started on my Node Red Journey, thank you. 😀

[andymok]

Thanks. Very well explained. I understood bits and pieces before, but now more.

[romanykemp]

Absolutely fantastic presentation you created here! Thank You!

[joeking]

Very well done, very helpful & clear

[michaeljeffery]

Fantastic guide/outline. I watched from start to finish, when; if you have some time make a follow-up for more indepth/advanced JSON tutorials.

[riseiot]

Very good explanatory video. Thanks for the efforts

[higiniofuentes]

You began with very useful info, but I would prefer to have a sample with the original object you created in the beginning!

[NigelDeans]

If you ever do a tutorial on how to create a flow that will actually accept JSON from a browser or something like Postman - lemme know!

[TomParish]

May I ask, do you know if you can get NodeRed to respond to a JSONP (or JSON-P)? I can't seem to get it to return a payload from that particular device. I know for a fact the device (which is old) is a JSONP interface. Any tips or workaround would be appreciated. And ... man you nailed this tutorial. I've been looking for a simple straight forward video of this nature. I'm pass it along to others.

[sarangautointegra]

Hi, friend,
Very goods video..

But how do you have tutorial for format number, take from mqtt
Example in your sample
"count": 22,
May be 22 to changing number from MQTT..?

Thanks friend

[drschrsch]

Awesome video (and the whole series) Thanks for that!

One question: I find filtering out specific values from a message an elegant solution. Like you did in the debug node. However, how can i do the same within the flow, not just for the debug output? Is there an easy way?

Thanks in advance!

[iratigaritano]

In node-red the information about fft node is very poor. Could you make a video explaining it use? Thank you

[sebastiantoulier]

PC to an external monitor and I'm watcNice tutorialng tNice tutorials video on one screen and working through exactly what Michael is doing and it is a big

[erendogan]

guys you need to click 3 dots at right side of "debug" to start debugging I wasted 15 mins to understand why I dont see incoming values :(

[BrianJurkowski]

THANK YOU for this! JSON always seemed so elusive and odd to me. Now that I understand it (thanks to your video!) It's actually quite simple!
I also appreciate the high quality of video production and great audio. That comibined with the useful content lead me to subscribing immediately. I hope to see more videos from you soon.
Cheers!

[LeTomasAHUMADA]

Excellent! I was trying to analyse the data from the OpenWeather using a Modicon M262. This video has helped me to understand the syntax and access to the right data. Thanks !!!😎👍

[edwaaij]

Thank you . Clear and clear explanation.

[lalimorini]

Thanks!!! Please, more js functions in node-red 🙏🏼🙏🏻