ST STM32L4 Manual page 94

•
JSON (JavaScript Object Notation) is an open standard lightweight
data-interchange format. As a text document, it is easy for users to read
and write, and for machines to parse and generate.
•
JSON is completely language independent, but uses conventions that
are familiar to C-family programmers including C, C++, C#, Java,
JavaScript, Perl, Python and many others.
{
"state": {
"desired": {
"LED_value": "On"
}
}
}
What Is JSON
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