MATLAB doesn`t see necessary COM port
4 vues (au cours des 30 derniers jours)
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I'm trying to communicate Simulink model with bluetooth external module through SPP (Serial Port Profile).
I know that the new version of Instrument control toolbox support bluetooth connections, but I need to do this from Simulink model.
I have two COM ports on my notebook kreated to connect module:
COM3 - for incoming connections
COM4 - for outgoing connections (not needed)
In the registry I have two ports: [HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM]
"\\Device\\BthModem1"="COM4"
"\\Device\\BthModem0"="COM3"
Matlab command instrhwinfo get me only COM4:
>> instrhwinfo('serial')
ans =
AvailableSerialPorts: {'COM4'}
JarFileVersion: 'Version 3.0.0'
ObjectConstructorName: {'serial('COM4');'}
SerialPorts: {'COM4'}
But I can connect to the port COM3 using terminal programms and MATLAB command promt!!!
If I type:
bt = serial('COM3');
bt.Terminator = '';
bt.BaudRate = 38400;
fopen(bt);
I have successfully connected to the port!
And, of course, the Simulink block "Serial config" doesn`t see this port, because it is not in the list of available serial ports.
Very grateful for any help!
2 commentaires
Doug Eastman
le 22 Fév 2012
Have you tried restarting MATLAB after plugging in the bluetooth module?
Réponses (3)
Hamid Jabbar
le 28 Jan 2015
Modifié(e) : Hamid Jabbar
le 28 Jan 2015
i face the similar problem. Matlab was seeing the port, but the Simulink serial configuration showed no port.
I have windows 8, Matlab2012b
I right click the Bluetooth icon in the right bottom screen and click 'settings'.
Bluetooth setting comes up.
select COM port Tab
Add port for incoming
If device support, add output port also.
Now i see the port in Simulink.
1 commentaire
X W
le 23 Juil 2017
Any solutions found for this problem? I also only see COM1 through COM4 in the Simulink To Instrument block, and I know( and matlab test and measurement tool(not in Simulink), see all the com- to COM14.
0 commentaires
X W
le 23 Juil 2017
Modifié(e) : Walter Roberson
le 23 Juil 2017
Here is an answer to this problem, the blocks are old, Matlab documents don't describe COM1-COM4 limitation, and why you'd use serial send, serial receive: https://stackoverflow.com/questions/4899507/difference-between-serial-send-and-to-instrument-blocks/35562205
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