I am trying to use the SSP as a COM port to receive data from MCU. I have to try many times to connect to the COM port, but it often failed to open.The version is R2013a and the codes are as below: s=serial('COM4'); fopen(s); Sometimes it would work,but usually failed and get errors: Open failed: Port: COM4 is not available. Available ports: COM4, COM5. Use INSTRFIND to determine if other instrument objects are connected to the requested device. Sometime I get this: Open failed: Cannot connect to the COM4 port.

Bluetooth GPIB I2C IVI. You can generate MATLAB code for your serial device that you can reuse later to communicate. Collect and Plot Data from an. USB Interfacing. Forrest Gump Suite Alan Silvestri Pdf Editor. Bluetooth Communication. I've made a COM or Bluetooth connection. It is most probably a case of setting the correct properties for the serial object in MATLAB. Ooh.!!I have a project must done within 2 months,my project Requires the ' HC-05 ' Serial Bluetooth module, which i don't have, So I was thinking of. Connection to arduino using bluetooth. Learn more about arduino, bluetooth Control System Toolbox.

Possible reasons are another application is connected to the port or the port does not exist. I use instrhwinfo('serial') to check whether the COM4 is available, and I could find the COM4 is in AvailableSerialPorts list. Psychology 8th Edition Gleitman Gross Reisberg Pdf Writer. Red Love Is All Around Raritan here. Even when the COM4 is not in AvailableSerialPorts list, sometimes I can still connect.

I was so confused. Here describe a similar problem, but I can't get any data using data=fgets(b); What's more I need to configure the COM ports like BaudRate,DataBits,StopBits.But I can't find these properties in bluetooth! This may be because you're not closing the serial connection after using it. After you open a serial connection and read from it, you need to close it before you can open and read from it again. So something like this should work every time: s=serial('COM4'); fopen(s); fgets(s); fclose(s); If you have an error and your script stops before reaching the fclose line, then you can use the following 2 commands to clear the open serial ports.

Newobjs = instrfind; fclose(newobjs) That should fix that problem.:).