Bluetooth Serial Connection Matlab Central
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.
The exercise is to retrieve the model number of a Bluetooth device. Win10 Bluetooth connection: Not sure why serial port object s7 fails to fopen. Any actionable suggestions or diagnostic questions are appreciated. >>s6 = serial('COM6', 'BaudRate', 9600); >>s7 = serial('COM7', 'BaudRate', 9600); >>s6.
Sometime I get this: Open failed: Cannot connect to the COM4 port. 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.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.:).
Tamil Serial Actress Rani Hot Images. Hello All, My last question helped me a lot and I've made some progress in establishing a connection. I've downloaded a Bluetooth driver for my USB dongle and now I can create a Serial Port for my Bluetooth connection. However, I've created only one COM port, is it possible to read and write to the same COM port? The reason for this question, is that I'm currently not receiving anything on this COM port. Gibbscam 2007 V8 7 7 Lz0p420a. I can write without errors, but I don't know how to check if it is received on my Bluetooth Device.
Does anyone have any tips or ideas? Greetings, Hans. You can read/write on the same COM port. The trick to checking whether data is being sent or received by the serial port and your device is to use some sort of serial port monitor.
Googling for it, should give you plenty of hits. The serial port monitor can confirm whether the data is being sent to the device and vice-versa. Once you can confirm data is being sent and received, you would have to then check whether its the correct data (i.e: you are sending out the exact commands that your device expects). Hi I have bluetooth device powered by an arduino which I can connect via COM port in a serial monitor such as putty. However I cannot do this in matlab. I set this up as a normal com port as follows: s = serial('COM6','BaudRate',9600,'DataBits',8,'StopBits',1,'Parity','None','FlowControl','None','ByteOrder','bigEndian','DataTerminalReady','off'); fopen(s); I usually get an error at fopen like this: Error using serial/fopen (line 72) Open failed: Cannot connect to the COM6 port. Possible reasons are another application is connected to the port or the port does not exist.
Error in arduino2matlab (line 13) fopen(s); Or sometimes it states that port is not open and then lists that same port as an available port. I'm sure I've closed it in the serial monitor and nothing else should be using it.
And when I use this code for hard-wire usb it works fine in matlab. I just don't understand why I cannot open the port in matlab but can in putty.