I have an SD card have a very big file (1M character). i try to load it into memory in terms of 4K character array ( The maximum I could do using Arduino Mega). but this take almost 250 call to the server. And this is too much. Is there any way better to do it. I am using firebase as my server and i am touching the limit and this is inacceptable to the stability of the program

  • So I guess you are using an ESP8266 with AT firmware for Wifi connection? Or do you use an ethernet shield?
    – chrisl
    Apr 19, 2021 at 14:08
  • client.write(file); doesn't work?
    – Juraj
    Apr 19, 2021 at 14:11
  • @chrisl I use SIM800L
    – Antoun
    Apr 19, 2021 at 14:21
  • @Juraj I guess this is not available i use micro sd interface and SIM800L and there is no such function as you mentioned
    – Antoun
    Apr 19, 2021 at 14:24
  • 1
    I don't think, that you can get around the 4k limitation with this hardware. Is the number of calls the problem, or the time needed for doing the whole transmission?
    – chrisl
    Apr 19, 2021 at 14:52


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