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I would like to save data that I am receiving from API calls in a char array. The problem is the data is around 80KB however my Arduino IoT 33 has 32KB of memory. It will save data in a char array that 25000 bytes however when I go to 30000 or above the Arduino freezes. When I copy-paste the entire data to a char array without specifying the size it works fine, however, when receiving data over API in chunks of 10KB it won't save the entire 80KB. Is there a way to go around this? A response will be appreciated.

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  • why do you want to store all that data? process it right away.
    – Juraj ♦
    Apr 30, 2020 at 18:27
  • well, it is basically a hexadecimal array to update an E-Ink Display. I need all of it at the same time.
    – Amir
    Apr 30, 2020 at 18:28
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    I will be updating my display probably 5 to 6 times a day. That should be enough right?
    – Amir
    Apr 30, 2020 at 18:37
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    I will try that. Thanks a lot :)
    – Amir
    Apr 30, 2020 at 18:38
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    what do you mean by hexadecimal array? ... are you storing text, not bytes?
    – jsotola
    Apr 30, 2020 at 19:08

1 Answer 1

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You can use the flash memory of the SAMD21 MCU used on the Nano 33 IoT, if you don't write too often. Flash memories have a limited count of write-erase cycles. It is guarantied for 10000 writes.

For Arduino SAMD boards like the Nano 33 IoT you can use the FlashStorage library. The library is in the Library Manager.

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