Insert update blob value converting from char *object and int length (no replies)

Hi,

I am running mysql in C++ on Debian platform. I have a small serialized msgpack object about 200 bytes, to run a statement to insert update the blob field, the blob value is from a buffer in char *object, int length, is any data type I can wrap the char *object and int length for the blob messageobject?

insert into mymessagetable (id, messageobject, timestamp) value (1, convertToBlob(object, length), 1549104102)

Thank you.