Json mystery !!

[rudy Serroyen]

Hy

I made diagram It does not work 

The data are here

{"channel":{"id":64246,"name":"Arduino Based Vent Damper Controlled","description":"Pour le feux  à pelet","field1":"S_D_B-Tem","field2":"S_D_B-Clapet","field3":"Room_1-Tem","field4":"Room_1-Clapet","field5":"Room_G-Tem","field6":"Room_G-Clapet","field7":"Room_S-Tem","field8":"Room_S-Clapet","created_at":"2015-11-05T17:23:27Z","updated_at":"2015-11-11T21:15:16Z","last_entry_id":2},"feeds":[{"created_at":"2015-11-11T21:15:16Z","entry_id":2,"field1":"20","field2":"90","field3":"19","field4":"90","field5":"18","field6":"0","field7":"18.5","field8":"0"}]}

Select list item: Attempt to get item number 5 of a list of length 1: (((created_at 2015-11-11T21:15:16Z) (entry_id 2) (field1 20) (field2 90) (field3 19) (field4 90) (field5 18) (field6 0) (field7 18.5) (field8 0)))

What is wrong.
Thank you

[Taifun]

each bracket pair represents a list

therefore first you have to select the first item from the main list and then item 5 from the sublist to get field3 19

it helps to use Do it to debug your blocks, see also tip 4 here  

Top 5 Tips: How to learn App Inventor

but probably you are only interested in the value 19?

in this case use the loopup in pairs block

How does the lookup in pairs block work?

• How to work with Lists by Saj
• How to work with Lists and Lists of lists (pdf) by appinventor.org
• An example of a complex List of Lists

Taifun

[Abraham Getzler]

Also see this sample Web Page Shredder app in the Gallery:

ai2.appinventor.mit.edu/?galleryId=4517583085371392

ABG