The more tokens you allocate, the more complex the JSON can be, but also the more memory is occupied. Each token takes 8 bytes, so sizeof (JsonParser<32>) is 256 bytes which is quite big in an Arduino ...
A serial port JSON websocket & web server that runs from the command line on Windows, Mac, Linux, Raspberry Pi, or Beagle Bone that lets you communicate with your serial port from a web application.