00: ff ; start byte
01: 05 ; response opcode
02: 00 ; message id (0x0001)
03: 01 ; ^
04: 01 ; error (true)
05: 00 ; response type (0x00 = ping)
06: 00 ; original message id (0x0000)
07: 00 ; ^
08: 00 ; remainder size (0x0000)
09: 00 ; ^