ZKFingerModule SDK can provide free support for ZKTeco embedded optical module SLK20M. It requires hosting hardware support,including TTL RS232/USB hosting device,ARM V7/V8,MCU,X86/X64-CPU,etc. The SDK could be work on hosting operation system,including Linux Kernel 2.6～3.0,RTOS,Windows,etc. If you have bought embedded fingerprint module SLK20M, the SDK will help you to develop.