Question

How can I write data from unsigned char* buffer to QDatastream. Threre are methods writeBytes and writeRawData. But they accept const char*. Can I use unsigned char* for it?

Answer 1

You can just cast to const char*

unsigned char array[] =  {1,2,3,4,5};
QByteArray ba;
QDataStream datastream(&ba,QIODevice::ReadWrite);
datastream.writeRawData((const char*) array,5);