Spark.variable() STRINGS larger than 9 chars issue [SOLVED]

Cloud
6

You will get this cryptic response when you have done something in error..

Do you have the Tinker app flashed to your Core, and are using the correct core ID and access_token?

You'll need a little bit more param for toggling D7:
https://api.spark.io/v1/devices/xxxxx/digitalread?access_token=xxxxx&params=D7,HIGH

Also, it needs to be a POST request, meaning you can't just put this one in your browser's address bar. Those only generate GET requests. This is likely your real issue.

Here's one way to do it with a nice Chrome extension: