hex mode send data buggy

2021-11-01 23:07:50,690048: Send: 0xFF 
2021-11-01 23:07:50,690344: Does not fit in a Byte!
2021-11-01 23:07:50,690758: Sending multiple Bytes

Looks like extra bytes are sent.

Space should separate bytes without a warning, need verification and fix if it is wrong.