[SOLVED] How do I retrieve and use exposed variables in the MIT App Inventor?

[ScruffR]

There are some threads in this forum that already deal with App Inventor questions
e.g.

Using MIT App Inventor to pass integer values to Photon

Hello Ric, Thanks for your reply. I’m trying to build a phone app that will take a low and high temperature setting and send it to the particle board to be compared with a temperature reading from a temp probe connected to the Photon. It mimics a thermostat, which could be achieved with one temperature setting, but it was already set up that way from another team member. I have attempted to duplicate the blocks you suggested with the correct information for my application. I don’t understan…

Although this is calling a Particle.function() rather than getting a Particle.variable(), but the principle is the same.

The difference is that you need a GET request (not POST as for functions) and catch the response (which really should be done with the function call too).

The documentation of the respective request can be found here
https://docs.particle.io/reference/device-cloud/api/#get-a-variable-value

The response will be in JSON format and can be parsed as shown here
http://ai2.appinventor.mit.edu/reference/other/json-web-apis.html