MATLAB: Does a serial connection to a UBLOX GPS device from MATLAB timeout

MATLAB

When I try to connect to a GPS device from MATLAB using a serial connection, the connection always returns a timeout. Other programs are able to connect properly to the device.

Best Answer

This is an issue with how the GPS device driver implements the serial port standard. MATLAB relies on a good implementation of the serial port driver, so updating the driver has been known to resolve the issue.

Related Solutions

MATLAB: Increase license timeout

The timeout for MathWorks Hosted License Manager(MHLM) license has become adjustable by an environment variable(MW_LM_SERVICE_TIMEOUT ). The base timeout for MHLM license is 60 seconds.

The environment variable: MW_LM_SERVICE_TIMEOUT will override the timeout with its own value in seconds. Set this environment variable on the computer calling MHLM for a license to something greater than 60 seconds.

Note:In a cluster configuration this variable will need to be set on the cluster nodes to take effect.

MATLAB: Am I unable to use the serial port after a hardware reset if the port was open in MATLAB

When a serial port connection is opened and the device becomes unavailable, the device remains unavailable after reconnecting. There is currently no way in MATLAB to fully reset the status of this connection, once this state is reached.

As a workaround you can first delete the serial port connection and then reconnect the device. For instance:

myComPort = serial('COM5');
fopen(myComPort);
% now disconnect the device
delete(myComPort)
clear myComPort
% now connect the device again, the following will now be successful:
myComPort = serial('COM5');
fopen(myComPort);

Best Answer

Related Solutions

MATLAB: Increase license timeout

MATLAB: Am I unable to use the serial port after a hardware reset if the port was open in MATLAB

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