talking to USB Relay Module

2020 8 5
1 个回答
更新时间：2024 4 18
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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?

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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

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ended up writing my own driver, never got it to work with native matlab functions.

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Oh... I've now found out that a Initialization file is required. I'll see if it works, otherwise I'll have to proceed as you did.
Thanks!
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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