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Minimizing footprint

To minimize the program Flash/RAM, you can disable some of the built-in functionality:
  1. 1.
    Comment-out #define BLYNK_PRINT to remove prints
  2. 2.
    Put on the top of your sketch:
    1
    #define BLYNK_NO_BUILTIN // Disable built-in analog & digital pin operations
    2
    #define BLYNK_NO_FLOAT // Disable float operations
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Porting, hacking

If you want to dive into crafting/hacking/porting Blynk library implementation, please also check this documentation.