Currently, i use a STM32F4 to pilot the DA14531, the DA14531 is working on advertising to send informations to a smartphone or another embedded board.
Everithing is ok, but i need to download from the smartphone a small configuration file (1k) to the DA14531 and after between the DA14531 to my STM32F4 via serial port.
Between the SMT32F4 and DA14531, no problem, i have already a lot of dialog, but between the DA14531 and smartphone, i have some dialog with the gatt profile , but i can send only 20 bytes, what's the best solution to send a file (1k or 2k bytes) ?
I don't find any profile to do it ?
If somebody have a sample, it'll be great.