This PCB can be used in place of RMCARD205 in order to allow serial communication over USB for non-Windows operating systems.

Serial port is at 2400,8,N,1 and the following are some commands discovered to work by Jeff Hayes:

Command Response Description
C Cancel power off or reboot.
D Returns current data
P2 Returns information about UPS hardware.
P4 Returns information about UPS model.
S<0x2E>1 Immediate power off.
S<0x2E>1R0000 Immediate reboot.
S03 Power off in 3 minutes.
S03R0003 Reboot in 3 minutes.

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