Is possible to send a command with the format all in hex

[HarizahSyawal]

Hello Kai currently my device that i communicate with, based on the specs need to send a command all in hex for example : Send command API Version [ReqId=1] (len=4): [#A1] 23 41 31 95 Recv (len=7): [#A1] 23 41 31 01 03 01 9a since your library at the end when write a data, need to getBytes. Is it possible to adapt with my device specs to send all command in hex format ?