ThingSpeak : Read & Write Multiple Field

Hello, Could you please recommend me best method for multiple fields read & right in ThingSpeak?

1. I want to write in MATLAB Simulink via ThingSpeak Cloud from MIT APP Inventer Application , 4 fields with ( digital write 0,1)?
2. I want to read 3 field value and read it from MIT App inventor via ThingSpeak Cloud?

i have problem in reading and writing multiple channels , can somebody recommend be the best way.

Answer 1

[Christopher Stapels]

Can you describe the data flow a bit more?

"in MATLAB Simulink via ThingSpeak Cloud from MIT APP Inventer Application "

What is the MIT App interacting with? Is it a deployed simulink model on hardware?

The MIT app will support POST commands (I'm pretty sure), you can post to you channel using the REST API write endpoint. You can update multiple fields simultaneously.

POST https://api.thingspeak.com/update

api_key=XXXXXXXXXXXXXXXX

field1=73

field2=37

etc...

You can also use the GET command and append additional fields

https://api.thingspeak.com/update.json?api_key=<write_api_key>&field1=123%field2=392 etc...

Similarly, you can read the whole feed (all fields ) at once with read data. I would use the JSON format, then you can parse the response for the fields you want.

https://api.thingspeak.com/channels/<channel_id>/feeds.<format>