Mathematica - Accelerometer Bricklet¶

Simple¶

Download (ExampleSimple.nb)

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Needs["NETLink`"]
LoadNETAssembly["Tinkerforge",NotebookDirectory[]<>"../../.."]

host="localhost"
port=4223
uid="XYZ"(*Change XYZ to the UID of your Accelerometer Bricklet*)

(*Create IPConnection and device object*)
ipcon=NETNew["Tinkerforge.IPConnection"]
a=NETNew["Tinkerforge.BrickletAccelerometer",uid,ipcon]
ipcon@Connect[host,port]

(*Get current acceleration*)
x=0;y=0;z=0
a@GetAcceleration[x,y,z]

Print["Acceleration [X]: "<>ToString[N[Quantity[x,"g/1000"]]]]
Print["Acceleration [Y]: "<>ToString[N[Quantity[y,"g/1000"]]]]
Print["Acceleration [Z]: "<>ToString[N[Quantity[z,"g/1000"]]]]

(*Clean up*)
ipcon@Disconnect[]
ReleaseNETObject[a]
ReleaseNETObject[ipcon]

Callback¶

Download (ExampleCallback.nb)

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Needs["NETLink`"]
LoadNETAssembly["Tinkerforge",NotebookDirectory[]<>"../../.."]

host="localhost"
port=4223
uid="XYZ"(*Change XYZ to the UID of your Accelerometer Bricklet*)

(*Create IPConnection and device object*)
ipcon=NETNew["Tinkerforge.IPConnection"]
a=NETNew["Tinkerforge.BrickletAccelerometer",uid,ipcon]
ipcon@Connect[host,port]

(*Callback function for acceleration callback*)
AccelerationCB[sender_,x_,y_,z_]:=
 Module[{},
  Print["Acceleration [X]: "<>ToString[N[Quantity[x,"g/1000"]]]];
  Print["Acceleration [Y]: "<>ToString[N[Quantity[y,"g/1000"]]]];
  Print["Acceleration [Z]: "<>ToString[N[Quantity[z,"g/1000"]]]]
 ]

AddEventHandler[a@AccelerationCallback,AccelerationCB]

(*Set period for acceleration callback to 1s (1000ms)*)
(*Note: The acceleration callback is only called every second*)
(*if the acceleration has changed since the last call!*)
a@SetAccelerationCallbackPeriod[1000]

Input["Click OK to exit"]

(*Clean up*)
ipcon@Disconnect[]
ReleaseNETObject[a]
ReleaseNETObject[ipcon]

Threshold¶

Download (ExampleThreshold.nb)

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Needs["NETLink`"]
LoadNETAssembly["Tinkerforge",NotebookDirectory[]<>"../../.."]

host="localhost"
port=4223
uid="XYZ"(*Change XYZ to the UID of your Accelerometer Bricklet*)

(*Create IPConnection and device object*)
ipcon=NETNew["Tinkerforge.IPConnection"]
a=NETNew["Tinkerforge.BrickletAccelerometer",uid,ipcon]
ipcon@Connect[host,port]

(*Get threshold callbacks with a debounce time of 10 seconds (10000ms)*)
a@SetDebouncePeriod[10000]

(*Callback function for acceleration reached callback*)
AccelerationReachedCB[sender_,x_,y_,z_]:=
 Module[{},
  Print["Acceleration [X]: "<>ToString[N[Quantity[x,"g/1000"]]]];
  Print["Acceleration [Y]: "<>ToString[N[Quantity[y,"g/1000"]]]];
  Print["Acceleration [Z]: "<>ToString[N[Quantity[z,"g/1000"]]]]
 ]

AddEventHandler[a@AccelerationReachedCallback,AccelerationReachedCB]

(*Configure threshold for acceleration "greater than 2 g, 2 g, 2 g"*)
option=Tinkerforge`BrickletAccelerometer`THRESHOLDUOPTIONUGREATER
a@SetAccelerationCallbackThreshold[option,2*1000,0,2*1000,0,2*1000,0]

Input["Click OK to exit"]

(*Clean up*)
ipcon@Disconnect[]
ReleaseNETObject[a]
ReleaseNETObject[ipcon]

Basic Functions¶

BrickletAccelerometer[uid, ipcon] → accelerometer¶

Parameters:	uid – Type: String ipcon – Type: NETObject[IPConnection]
Returns:	accelerometer – Type: NETObject[BrickletAccelerometer]

Creates an object with the unique device ID uid:

accelerometer=NETNew["Tinkerforge.BrickletAccelerometer","YOUR_DEVICE_UID",ipcon]

This object can then be used after the IP Connection is connected.

The .NET runtime has built-in garbage collection that frees objects that are no longer in use by a program. But because Mathematica can not automatically tell when a Mathematica "program" doesn't use a .NET object anymore, this has to be done by the program. For this the ReleaseNETObject[] function is used in the examples.

For further information about object management in .NET/Link see the corresponding Mathematica .NET/Link documentation.

BrickletAccelerometer@GetAcceleration[out x, out y, out z] → Null¶

Output Parameters:	x – Type: Integer, Unit: 1/1000 gₙ, Range: ? y – Type: Integer, Unit: 1/1000 gₙ, Range: ? z – Type: Integer, Unit: 1/1000 gₙ, Range: ?

Returns the acceleration in x, y and z direction. The values are given in gₙ/1000 (1gₙ = 9.80665m/s²). The range is configured with SetConfiguration[].

If you want to get the acceleration periodically, it is recommended to use the AccelerationCallback callback and set the period with SetAccelerationCallbackPeriod[].

BrickletAccelerometer@GetTemperature[] → temperature¶

Returns:	temperature – Type: Integer, Unit: 1 °C, Range: [-103 to 152]

Returns the temperature of the accelerometer.

BrickletAccelerometer@LEDOn[] → Null¶

Enables the LED on the Bricklet.

BrickletAccelerometer@LEDOff[] → Null¶

Disables the LED on the Bricklet.

BrickletAccelerometer@IsLEDOn[] → on¶

Returns:	on – Type: True/False, Default: False

Returns true if the LED is enabled, false otherwise.

Advanced Functions¶

BrickletAccelerometer@SetConfiguration[dataRate, fullScale, filterBandwidth] → Null¶

Parameters:	dataRate – Type: Integer, Range: See constants, Default: 6 fullScale – Type: Integer, Range: See constants, Default: 1 filterBandwidth – Type: Integer, Range: See constants, Default: 2

Configures the data rate, full scale range and filter bandwidth. Possible values are:

• Data rate of 0Hz to 1600Hz.
• Full scale range of ±2gₙ up to ±16gₙ.
• Filter bandwidth between 50Hz and 800Hz.

Decreasing data rate or full scale range will also decrease the noise on the data.

The following constants are available for this function:

For dataRate:

• BrickletAccelerometer`DATAURATEUOFF = 0
• BrickletAccelerometer`DATAURATEU3HZ = 1
• BrickletAccelerometer`DATAURATEU6HZ = 2
• BrickletAccelerometer`DATAURATEU12HZ = 3
• BrickletAccelerometer`DATAURATEU25HZ = 4
• BrickletAccelerometer`DATAURATEU50HZ = 5
• BrickletAccelerometer`DATAURATEU100HZ = 6
• BrickletAccelerometer`DATAURATEU400HZ = 7
• BrickletAccelerometer`DATAURATEU800HZ = 8
• BrickletAccelerometer`DATAURATEU1600HZ = 9

For fullScale:

• BrickletAccelerometer`FULLUSCALEU2G = 0
• BrickletAccelerometer`FULLUSCALEU4G = 1
• BrickletAccelerometer`FULLUSCALEU6G = 2
• BrickletAccelerometer`FULLUSCALEU8G = 3
• BrickletAccelerometer`FULLUSCALEU16G = 4

For filterBandwidth:

• BrickletAccelerometer`FILTERUBANDWIDTHU800HZ = 0
• BrickletAccelerometer`FILTERUBANDWIDTHU400HZ = 1
• BrickletAccelerometer`FILTERUBANDWIDTHU200HZ = 2
• BrickletAccelerometer`FILTERUBANDWIDTHU50HZ = 3

BrickletAccelerometer@GetConfiguration[out dataRate, out fullScale, out filterBandwidth] → Null¶

Output Parameters:	dataRate – Type: Integer, Range: See constants, Default: 6 fullScale – Type: Integer, Range: See constants, Default: 1 filterBandwidth – Type: Integer, Range: See constants, Default: 2

Returns the configuration as set by SetConfiguration[].

The following constants are available for this function:

For dataRate:

• BrickletAccelerometer`DATAURATEUOFF = 0
• BrickletAccelerometer`DATAURATEU3HZ = 1
• BrickletAccelerometer`DATAURATEU6HZ = 2
• BrickletAccelerometer`DATAURATEU12HZ = 3
• BrickletAccelerometer`DATAURATEU25HZ = 4
• BrickletAccelerometer`DATAURATEU50HZ = 5
• BrickletAccelerometer`DATAURATEU100HZ = 6
• BrickletAccelerometer`DATAURATEU400HZ = 7
• BrickletAccelerometer`DATAURATEU800HZ = 8
• BrickletAccelerometer`DATAURATEU1600HZ = 9

For fullScale:

• BrickletAccelerometer`FULLUSCALEU2G = 0
• BrickletAccelerometer`FULLUSCALEU4G = 1
• BrickletAccelerometer`FULLUSCALEU6G = 2
• BrickletAccelerometer`FULLUSCALEU8G = 3
• BrickletAccelerometer`FULLUSCALEU16G = 4

For filterBandwidth:

• BrickletAccelerometer`FILTERUBANDWIDTHU800HZ = 0
• BrickletAccelerometer`FILTERUBANDWIDTHU400HZ = 1
• BrickletAccelerometer`FILTERUBANDWIDTHU200HZ = 2
• BrickletAccelerometer`FILTERUBANDWIDTHU50HZ = 3

BrickletAccelerometer@GetIdentity[out uid, out connectedUid, out position, out {hardwareVersion1, hardwareVersion2, hardwareVersion3}, out {firmwareVersion1, firmwareVersion2, firmwareVersion3}, out deviceIdentifier] → Null¶

Output Parameters:

uid – Type: String, Length: up to 8 connectedUid – Type: String, Length: up to 8 position – Type: Integer, Range: [ToCharacterCode["a"][[0]] to ToCharacterCode["h"][[0]], ToCharacterCode["z"][[0]]] hardwareVersioni – Type: Integer 1: major – Type: Integer, Range: [0 to 255] 2: minor – Type: Integer, Range: [0 to 255] 3: revision – Type: Integer, Range: [0 to 255] firmwareVersioni – Type: Integer 1: major – Type: Integer, Range: [0 to 255] 2: minor – Type: Integer, Range: [0 to 255] 3: revision – Type: Integer, Range: [0 to 255] deviceIdentifier – Type: Integer, Range: [0 to 216 - 1]

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions¶

BrickletAccelerometer@SetAccelerationCallbackPeriod[period] → Null¶

Parameters:	period – Type: Integer, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0

Sets the period with which the AccelerationCallback callback is triggered periodically. A value of 0 turns the callback off.

The AccelerationCallback callback is only triggered if the acceleration has changed since the last triggering.

BrickletAccelerometer@GetAccelerationCallbackPeriod[] → period¶

Returns:	period – Type: Integer, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0

Returns the period as set by SetAccelerationCallbackPeriod[].

BrickletAccelerometer@SetAccelerationCallbackThreshold[option, minX, maxX, minY, maxY, minZ, maxZ] → Null¶

Parameters:

option – Type: Integer, Range: See constants, Default: ToCharacterCode["x"][[0]] minX – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxX – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 minY – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxY – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 minZ – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxZ – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0

Sets the thresholds for the AccelerationReachedCallback callback.

The following options are possible:

Option	Description
'x'	Callback is turned off
'o'	Callback is triggered when the acceleration is outside the min and max values
'i'	Callback is triggered when the acceleration is inside the min and max values
'<'	Callback is triggered when the acceleration is smaller than the min value (max is ignored)
'>'	Callback is triggered when the acceleration is greater than the min value (max is ignored)

The following constants are available for this function:

For option:

• BrickletAccelerometer`THRESHOLDUOPTIONUOFF = ToCharacterCode["x"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUOUTSIDE = ToCharacterCode["o"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUINSIDE = ToCharacterCode["i"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUSMALLER = ToCharacterCode["<"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUGREATER = ToCharacterCode[">"][[0]]

BrickletAccelerometer@GetAccelerationCallbackThreshold[out option, out minX, out maxX, out minY, out maxY, out minZ, out maxZ] → Null¶

Output Parameters:

option – Type: Integer, Range: See constants, Default: ToCharacterCode["x"][[0]] minX – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxX – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 minY – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxY – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 minZ – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0 maxZ – Type: Integer, Unit: 1/1000 gₙ, Range: [-215 to 215 - 1], Default: 0

Returns the threshold as set by SetAccelerationCallbackThreshold[].

The following constants are available for this function:

For option:

• BrickletAccelerometer`THRESHOLDUOPTIONUOFF = ToCharacterCode["x"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUOUTSIDE = ToCharacterCode["o"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUINSIDE = ToCharacterCode["i"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUSMALLER = ToCharacterCode["<"][[0]]
• BrickletAccelerometer`THRESHOLDUOPTIONUGREATER = ToCharacterCode[">"][[0]]

BrickletAccelerometer@SetDebouncePeriod[debounce] → Null¶

Parameters:	debounce – Type: Integer, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100

Sets the period with which the threshold callback

• AccelerationReachedCallback

is triggered, if the threshold

• SetAccelerationCallbackThreshold[]

keeps being reached.

BrickletAccelerometer@GetDebouncePeriod[] → debounce¶

Returns:	debounce – Type: Integer, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100

Returns the debounce period as set by SetDebouncePeriod[].

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by assigning a function to a callback property of the device object:

MyCallback[sender_,value_]:=Print["Value: "<>ToString[value]]

AddEventHandler[accelerometer@ExampleCallback,MyCallback]

For further information about event handling using .NET/Link see the corresponding Mathematica .NET/Link documentation.

The available callback property and their type of parameters are described below.

event BrickletAccelerometer@AccelerationCallback[sender, x, y, z]¶

Callback Parameters:	sender – Type: NETObject[BrickletAccelerometer] x – Type: Integer, Unit: 1/1000 gₙ, Range: ? y – Type: Integer, Unit: 1/1000 gₙ, Range: ? z – Type: Integer, Unit: 1/1000 gₙ, Range: ?

This callback is triggered periodically with the period that is set by SetAccelerationCallbackPeriod[]. The parameters are the X, Y and Z acceleration. The range is configured with SetConfiguration[].

The AccelerationCallback callback is only triggered if the acceleration has changed since the last triggering.

event BrickletAccelerometer@AccelerationReachedCallback[sender, x, y, z]¶

Callback Parameters:	sender – Type: NETObject[BrickletAccelerometer] x – Type: Integer, Unit: 1/1000 gₙ, Range: ? y – Type: Integer, Unit: 1/1000 gₙ, Range: ? z – Type: Integer, Unit: 1/1000 gₙ, Range: ?

This callback is triggered when the threshold as set by SetAccelerationCallbackThreshold[] is reached. The parameters are the X, Y and Z acceleration. The range is configured with SetConfiguration[].

If the threshold keeps being reached, the callback is triggered periodically with the period as set by SetDebouncePeriod[].

Virtual Functions¶

Virtual functions don't communicate with the device itself, but operate only on the API bindings device object. They can be called without the corresponding IP Connection object being connected.

BrickletAccelerometer@GetAPIVersion[] → {apiVersion1, apiVersion2, apiVersion3}¶

Output Parameters:	apiVersioni – Type: Integer 1: major – Type: Integer, Range: [0 to 255] 2: minor – Type: Integer, Range: [0 to 255] 3: revision – Type: Integer, Range: [0 to 255]

Returns the version of the API definition implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

BrickletAccelerometer@GetResponseExpected[functionId] → responseExpected¶

Parameters:	functionId – Type: Integer, Range: See constants
Returns:	responseExpected – Type: True/False

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by SetResponseExpected[]. For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletAccelerometer`FUNCTIONUSETUACCELERATIONUCALLBACKUPERIOD = 2
• BrickletAccelerometer`FUNCTIONUSETUACCELERATIONUCALLBACKUTHRESHOLD = 4
• BrickletAccelerometer`FUNCTIONUSETUDEBOUNCEUPERIOD = 6
• BrickletAccelerometer`FUNCTIONUSETUCONFIGURATION = 9
• BrickletAccelerometer`FUNCTIONULEDUON = 11
• BrickletAccelerometer`FUNCTIONULEDUOFF = 12

BrickletAccelerometer@SetResponseExpected[functionId, responseExpected] → Null¶

Parameters:	functionId – Type: Integer, Range: See constants responseExpected – Type: True/False

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletAccelerometer`FUNCTIONUSETUACCELERATIONUCALLBACKUPERIOD = 2
• BrickletAccelerometer`FUNCTIONUSETUACCELERATIONUCALLBACKUTHRESHOLD = 4
• BrickletAccelerometer`FUNCTIONUSETUDEBOUNCEUPERIOD = 6
• BrickletAccelerometer`FUNCTIONUSETUCONFIGURATION = 9
• BrickletAccelerometer`FUNCTIONULEDUON = 11
• BrickletAccelerometer`FUNCTIONULEDUOFF = 12

BrickletAccelerometer@SetResponseExpectedAll[responseExpected] → Null¶

Parameters:	responseExpected – Type: True/False

Changes the response expected flag for all setter and callback configuration functions of this device at once.

Constants¶

BrickletAccelerometer`DEVICEUIDENTIFIER¶

This constant is used to identify a Accelerometer Bricklet.

The GetIdentity[] function and the IPConnection@EnumerateCallback callback of the IP Connection have a deviceIdentifier parameter to specify the Brick's or Bricklet's type.

BrickletAccelerometer`DEVICEDISPLAYNAME¶

This constant represents the human readable name of a Accelerometer Bricklet.