Bluetooth Warning - Unable to Read All Data

These remedies apply to the case when you receive some data and you get this warning message:

'Bluetooth' unable to read all requested data

ASCII Data

When using the Bluetooth® interface for:

  • Reading ASCII (text) data using the fscanf, fgets, or fgetl functions

these are possible causes and remedies:

CauseSolution
An incorrect read terminator was used.Verify that the Terminator property is set to the value required by your device. For more information about setting the property, see Terminator.
Communication with the device was interrupted.Check your device connection. For tips, see Troubleshooting Bluetooth Interface.

Binary Data

When using the Bluetooth interface for:

  • Reading binary data using the fread function

these are possible causes and remedies:

CauseSolution
The number of values to read was not specified and was set to the InputBufferSize by default, or the number of values to be read was specified to a value greater than the BytesAvailable property.Set the number of values to read using the size argument on the fread function, or change the InputBufferSize property. For more information about setting the property, see InputBufferSize. For information about setting number of values to read, see fread.
Device did not send all the requested data.Check your device connection. For tips, see Troubleshooting Bluetooth Interface.
There was a data format mismatch.Verify that the device data format matches the specified read format. Data format is set using the Precision property. For more information about supported precisions, see fread.

Binblock Data

When using the Bluetooth interface for:

  • Reading binblock (binary-block) data using the binblockread function

these are possible causes and remedies:

CauseSolution
The timeout value might be too short for the amount of data being read.Increase the Timeout property value. For more information about setting the property, see Timeout.
Communication with the device was interrupted.Check your device connection. For tips, see Troubleshooting Bluetooth Interface.

More Troubleshooting Help

For more information about troubleshooting the Bluetooth interface, including supported platforms, adaptor requirements, configuration and connection, and other troubleshooting tips, see Troubleshooting Bluetooth Interface.