Is there any way I could avoid using the array in PROGMEM in Arduino or modify it?

Question

I am using the SSD1306 OLED with Arduino. I am trying to send the Bitmap data via HC-05 Bluetooth module, so I can display the Bitmap image on the OLED.

The problem I'm facing is :

const uint8_t frame1[] PROGMEM = {
0x00, 0x00, 0x00, 0x00, 0xff, 0xff,...}

The above frame1[] array of preexisting Bitmap is of const type and gets stored in PROGMEM (has to be of const type) , and thus the array cannot be modified. Is there any other way I could display the received data or even, modify the frame1[] array to display the bitmap instantly as I get the bitmap data over Bluetooth?

PS : I'm using the U8g library for display

Answer 1

How about something like this:

uint8_t frame1[] = { 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,...};

You don't need to save the array in your arduinos PROGMEM , you can also save it as a regular array.

That may only be a problem if your arduinos ram is too low, so that the frame can only fit into PROGMEM - just try it