How to use a Char ARRAY

Hi,

i m doing a project which consists of esp32 & tft display. i want to transmit the byte
(for ex: 0x00,0x01 - nearly it goes to 1000 datas) datas to esp32 via bluetooth.Bluetooth communication is working fine. i m reading the incoming data in String variable, but i want to convert it to unsigned char array [unsigned char bitmapArray[] PROGMEM = {}; ] i m not able to do it. please help me.

Thanks in advance.

Split from an unrelated topic

DO NOT hijack topics

You can't easily write into PROGMEM (for very good reason)

Your other post hijacking another unrelated topic has been deleted