Stream Sensor Data with Sensor Controls
Send sensor data to MATLAB® running on MathWorks® Cloud using MATLAB
Mobile™ sensor controls. To communicate with the iOS device and acquire data from
the sensors, you will create the mobiledev
object as part of this
procedure. You cannot log the sensor data until you create the object.
Sign in to your MathWorks Account, if prompted.
In the Command Window, create a
mobiledev
object in MATLAB; for example:m = mobiledev
m = mobiledev with properties: Connected: 1 Available Cameras: {'back' 'front'} Logging: 0 InitialTimestamp: '' AccelerationSensorEnabled: 0 AngularVelocitySensorEnabled: 0 MagneticSensorEnabled: 0 OrientationSensorEnabled: 0 PositionSensorEnabled: 0 Supported functions
In the display that is shown when you create the object:
0
- Not enabled, off, or the sensor is not available on this device.1
- Enabled or on.
In this example, you can see that the device and the
mobiledev
object are connected, but the sensors are not enabled (all sensor values are0
) and data has not been logged yet (InitialTimestamp
property is empty). If your device does not have a particular sensor, that sensor always shows a0
in the display.InitialTimestamp
is the timestamp of the first data point received bymobiledev
. All other timestamps for all sensors are relative toInitialTimestamp
.Tap menu and then tap Sensors.
Turn on the sensor you want using the toggle switch.
If you are using the position sensor, turn on Location access for MATLAB in Settings on your device.
If not already selected, tap Stream to and select MATLAB .
To start sending data to MATLAB, tap START.
At the MATLAB command line, view sensor data using the
mobiledev
object; for example:m
Current Sensor Values: Acceleration: [-0.7200 4.6491 8.3620] (m/s^2)
To stop sending data, tap STOP.
Repeat these steps to collect more data.
You can query latest values and plot the data or do other post-processing tasks. For examples, see Sensor Data Streaming Demo and Use Logged Sensor Data Example.
Note
If you are using Wi-Fi® as your connection method, you may have to adjust the sleep setting on your iOS device.