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I think I may be able to help clarify things a bit here: You are not trying to "flash" the ESP01 (the kind you have) board, but you are trying to talk to the AT command firmware it came installed with. Also, there's a sort of pingback sketch (I forget the name and can't find it, but it basically uses a SoftwareSerial and copies characters from one to the ...


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F() puts the constant string literal in the flash part of your device. This way it does not use the RAM space otherwise needed. But your mediaTotPg array is most probably (you didn't say anything about it) a non-const variable, and can't be put in flash memory. If the values to be shown are in fact const, you need to put them in the flash memory. As ...


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For a constant array of integers you need to use PROGMEM and the various pgm_read_*() functions. You can read more, and find examples, on the Arduino PROGMEM manual page.


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