The board can not work without computer.

The board is tested with 10 meters USB cable and works fine.

There is no protection against reversed polarity! If the +Vcc and GND are reversed the board will be damaged! Such protection is added since hardware revsion Rev.:.

This problem is fixed since hardware revsion Rev.:

(You can avoid this if you first connect the USB cable and then supply the relay board). This is because of the structure of the FTDI chip. When the board is connected to the PC and/or the PC is restarted, the relays(1,3,5) will be toggled several times. Be sure 'Synchronous Bit-Bang Mode' is selected! FTDI provides Bit-Bang Mode documentation. When data is sent to the register the outputs are set. The relay board outputs are controlled by FT245RL. Create timers or pulses with our softwareĮach such board is shown as separate virtual com port (VCP) on your PC.Control electrical devices according weekday/date/time.Supported by Denkovi Command line tool (Windows, Linux, Raspberry PI).Supported by DRM software (Windows, Linux, Raspberry PI).Supported by DRMv3 Software (Windows, Linux, Raspberry PI) - New.