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talking to USB Relay Module

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steve solomon
steve solomon 2020-8-5
评论： Amit Levy 2024-4-18
I have a USB relay module
this one: https://www.sainsmart.com/products/4-channel-5v-usb-relay-module
that has an FT245RL onboard running the relays. The drivers are installed correctly, and I can see the board on COM3. I create a serial port object thus:
relay = serialport('COM3',9600,'Parity','none','DataBits',8,'StopBits',1);
but when i try to send a command (e.g. write(relay,1,"uint8")), i get no response. I can run the board usaing a stand-alone app (USB 8 Relay Manager v.1.4.exe), and after i have used that app to toggle the relays, I can then operate hte relays with my matlab code (after closing out the stand alone relay app of course).
So what's going on here?
  1 个评论
Eduard Mauri Rodriguez
Eduard Mauri Rodriguez 2022-5-11
Hello Steve,
Did you find a solution to the problem? Because I'm currently having the same problem and still haven't found a solution.
Thank you very much,
Edu

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回答（1 个）

steve solomon
steve solomon 2022-5-11
ended up writing my own driver, never got it to work with native matlab functions.
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steve solomon
steve solomon 2022-5-11
let me know if that doesnt do the trick and I will dig up the driver so you dont have to reinvent that particular wheel.
Amit Levy
Amit Levy 2024-4-18
Did you manage to solve this?

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