Kind of development: Customization of existing program
Description of requirements/functionality: control relays via USB
OS requirements: Windows
Extra notes: Need to switch 2 relays on/off via Excel program
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Clarification Board Ask a Question
The key point here is what command to send over and how to run the relays. I assume this is RS 232 via USB cable and it accepts a command of turning it on.
Sending such a low level command is done by binary code called from Excel via API in dll(s). However it should be known what and where to send.
So any documentation driver or protocol of how these relays work will be helpful and will make me confidant of sending a proposal.
I have sent you the proposal based on the details provided in your earlier replies.
Please do have a look and let me know your thoughts.
How do you plan to connect the USB to the relays? Will each relay have its own USB connection to the computer?
Are you designing the relays and comms interface yourself, or are you using some off-the-shelf units?
Can you provide some more details about the project so that I can understand the requirements better and let you know whehther I will be able to do this.
Have you carried out any research on this issue? Do you already have the relay's?
Thank you for the invite.
I do not have much experience in hard2are software integrations, so not sure about the scope.