Firmware release notes SW01800-1.6.0.0

Supported products:
Z-KEY-0 (Rev. E0)
Z-KEY-0 (Rev. F0)
Z-KEY-0 (Rev. F1)
R-KEY-LT (Rev. C0)
R-KEY-LT (Rev. D0)
R-KEY-LT (Rev. D1)
Z-KEY-2ETH (Rev. B0)

FIX:
-New Optimization for multi-client on sockets and serial ports 
-Fix on DHCP 
-Fix ASCII mode in response to requests on serial port RS485#2