Convert char* to uint8_t

Question

I transfer message trough a CAN protocol.

To do so, the CAN message needs data of uint8_t type. So I need to convert my char* to ui

Answer 1

char * is a pointer, not a single character. It is possible that it points to the character you want.

uint8_t is unsigned but on most systems will be the same size as a char and you can simply cast the value.

You may need to manage the memory and lifetime of what your function returns. This could be done with vector< unsigned char> as the return type of your function rather than char *, especially if toUtf8() has to create the memory for the data.

Your question is totally ambiguous.

ui->canDataModifiableTableWidget->item(6,3)->text().toUtf8().data();

That is a lot of cascading calls. We have no idea what any of them do and whether they are yours or not. It looks dangerous.