Shell - Ambient Light Bricklet 2.0¶

Simple¶

Download (example-simple.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Ambient Light Bricklet 2.0

# Get current illuminance
tinkerforge call ambient-light-v2-bricklet $uid get-illuminance

Callback¶

Download (example-callback.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Ambient Light Bricklet 2.0

# Handle incoming illuminance callbacks
tinkerforge dispatch ambient-light-v2-bricklet $uid illuminance &

# Set period for illuminance callback to 1s (1000ms)
# Note: The illuminance callback is only called every second
#       if the illuminance has changed since the last call!
tinkerforge call ambient-light-v2-bricklet $uid set-illuminance-callback-period 1000

echo "Press key to exit"; read dummy

kill -- -$$ # Stop callback dispatch in background

Threshold¶

Download (example-threshold.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Ambient Light Bricklet 2.0

# Get threshold callbacks with a debounce time of 10 seconds (10000ms)
tinkerforge call ambient-light-v2-bricklet $uid set-debounce-period 10000

# Handle incoming illuminance reached callbacks
tinkerforge dispatch ambient-light-v2-bricklet $uid illuminance-reached\
 --execute "echo Illuminance: {illuminance}/100 lx. Too bright, close the curtains!" &

# Configure threshold for illuminance "greater than 500 lx"
tinkerforge call ambient-light-v2-bricklet $uid set-illuminance-callback-threshold threshold-option-greater 50000 0

echo "Press key to exit"; read dummy

kill -- -$$ # Stop callback dispatch in background

Command Structure¶

The common options of the call and dispatch commands are documented here. The specific command structure is shown below.

tinkerforge call ambient-light-v2-bricklet [<option>..] <uid> <function> [<argument>..]¶

Parameters:	<uid> – Type: String <function> – Type: String

The call command is used to call a function of the Ambient Light Bricklet 2.0. It can take several options:

• --help shows help for the specific call command and exits
• --list-functions shows a list of known functions of the Ambient Light Bricklet 2.0 and exits

tinkerforge dispatch ambient-light-v2-bricklet [<option>..] <uid> <callback>¶

Parameters:	<uid> – Type: String <callback> – Type: String

The dispatch command is used to dispatch a callback of the Ambient Light Bricklet 2.0. It can take several options:

• --help shows help for the specific dispatch command and exits
• --list-callbacks shows a list of known callbacks of the Ambient Light Bricklet 2.0 and exits

tinkerforge call ambient-light-v2-bricklet <uid> <function> [<option>..] [<argument>..]¶

Parameters:	<uid> – Type: String <function> – Type: String

The <function> to be called can take different options depending of its kind. All functions can take the following options:

• --help shows help for the specific function and exits

Getter functions can take the following options:

• --execute <command> shell command line to execute for each incoming response (see section about output formatting for details)

Setter functions can take the following options:

• --expect-response requests response and waits for it

The --expect-response option for setter functions allows to detect timeouts and other error conditions calls of setters as well. The device will then send a response for this purpose. If this option is not given for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

tinkerforge dispatch ambient-light-v2-bricklet <uid> <callback> [<option>..]¶

Parameters:	<uid> – Type: String <callback> – Type: String

The <callback> to be dispatched can take several options:

• --help shows help for the specific callback and exits
• --execute <command> shell command line to execute for each incoming response (see section about output formatting for details)

Basic Functions¶

tinkerforge call ambient-light-v2-bricklet <uid> get-illuminance¶

Output:	illuminance – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1]

Returns the illuminance of the ambient light sensor. The measurement range goes up to about 100000lux, but above 64000lux the precision starts to drop.

Changed in version 2.0.2 (Plugin): An illuminance of 0lux indicates an error condition where the sensor cannot perform a reasonable measurement. This can happen with very dim or very bright light conditions. In bright light conditions this might indicate that the sensor is saturated and the configuration should be modified (set-configuration) to better match the light conditions.

If you want to get the illuminance periodically, it is recommended to use the illuminance callback and set the period with set-illuminance-callback-period.

Advanced Functions¶

tinkerforge call ambient-light-v2-bricklet <uid> set-configuration <illuminance-range> <integration-time>¶

Parameters:	<illuminance-range> – Type: Int, Range: See symbols, Default: 3 <integration-time> – Type: Int, Range: See symbols, Default: 3
Output:	no output

Sets the configuration. It is possible to configure an illuminance range between 0-600lux and 0-64000lux and an integration time between 50ms and 400ms.

New in version 2.0.2 (Plugin): The unlimited illuminance range allows to measure up to about 100000lux, but above 64000lux the precision starts to drop.

A smaller illuminance range increases the resolution of the data. A longer integration time will result in less noise on the data.

Changed in version 2.0.2 (Plugin): If the actual measure illuminance is out-of-range then the current illuminance range maximum +0.01lux is reported by get-illuminance and the illuminance callback. For example, 800001 for the 0-8000lux range.

Changed in version 2.0.2 (Plugin): With a long integration time the sensor might be saturated before the measured value reaches the maximum of the selected illuminance range. In this case 0lux is reported by get-illuminance and the illuminance callback.

If the measurement is out-of-range or the sensor is saturated then you should configure the next higher illuminance range. If the highest range is already in use, then start to reduce the integration time.

The following symbols are available for this function:

For <illuminance-range>:

• illuminance-range-unlimited = 6
• illuminance-range-64000lux = 0
• illuminance-range-32000lux = 1
• illuminance-range-16000lux = 2
• illuminance-range-8000lux = 3
• illuminance-range-1300lux = 4
• illuminance-range-600lux = 5

For <integration-time>:

• integration-time-50ms = 0
• integration-time-100ms = 1
• integration-time-150ms = 2
• integration-time-200ms = 3
• integration-time-250ms = 4
• integration-time-300ms = 5
• integration-time-350ms = 6
• integration-time-400ms = 7

tinkerforge call ambient-light-v2-bricklet <uid> get-configuration¶

Output:	illuminance-range – Type: Int, Range: See symbols, Default: 3 integration-time – Type: Int, Range: See symbols, Default: 3

Returns the configuration as set by set-configuration.

The following symbols are available for this function:

For illuminance-range:

• illuminance-range-unlimited = 6
• illuminance-range-64000lux = 0
• illuminance-range-32000lux = 1
• illuminance-range-16000lux = 2
• illuminance-range-8000lux = 3
• illuminance-range-1300lux = 4
• illuminance-range-600lux = 5

For integration-time:

• integration-time-50ms = 0
• integration-time-100ms = 1
• integration-time-150ms = 2
• integration-time-200ms = 3
• integration-time-250ms = 4
• integration-time-300ms = 5
• integration-time-350ms = 6
• integration-time-400ms = 7

tinkerforge call ambient-light-v2-bricklet <uid> get-identity¶

Output:

uid – Type: String, Length: up to 8 connected-uid – Type: String, Length: up to 8 position – Type: Char, Range: [a to h, z] hardware-version – Type: Int Array, Length: 3 0: major – Type: Int, Range: [0 to 255] 1: minor – Type: Int, Range: [0 to 255] 2: revision – Type: Int, Range: [0 to 255] firmware-version – Type: Int Array, Length: 3 0: major – Type: Int, Range: [0 to 255] 1: minor – Type: Int, Range: [0 to 255] 2: revision – Type: Int, Range: [0 to 255] device-identifier – Type: Int, 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. 

Callback Configuration Functions¶

tinkerforge call ambient-light-v2-bricklet <uid> set-illuminance-callback-period <period>¶

Parameters:	<period> – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Output:	no output

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

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

tinkerforge call ambient-light-v2-bricklet <uid> get-illuminance-callback-period¶

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

Returns the period as set by set-illuminance-callback-period.

tinkerforge call ambient-light-v2-bricklet <uid> set-illuminance-callback-threshold <option> <min> <max>¶

Parameters:	<option> – Type: Char, Range: See symbols, Default: x <min> – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1], Default: 0 <max> – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1], Default: 0
Output:	no output

Sets the thresholds for the illuminance-reached callback.

The following options are possible:

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

The following symbols are available for this function:

For <option>:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call ambient-light-v2-bricklet <uid> get-illuminance-callback-threshold¶

Output:	option – Type: Char, Range: See symbols, Default: x min – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1], Default: 0 max – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1], Default: 0

Returns the threshold as set by set-illuminance-callback-threshold.

The following symbols are available for this function:

For option:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call ambient-light-v2-bricklet <uid> set-debounce-period <debounce>¶

Parameters:	<debounce> – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100
Output:	no output

Sets the period with which the threshold callbacks

• illuminance-reached,

are triggered, if the thresholds

• set-illuminance-callback-threshold,

keep being reached.

tinkerforge call ambient-light-v2-bricklet <uid> get-debounce-period¶

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

Returns the debounce period as set by set-debounce-period.

Callbacks¶

Callbacks can be used to receive time critical or recurring data from the device:

tinkerforge dispatch ambient-light-v2-bricklet <uid> example

The available callbacks are described below.

tinkerforge dispatch ambient-light-v2-bricklet <uid> illuminance¶

Output:	illuminance – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1]

This callback is triggered periodically with the period that is set by set-illuminance-callback-period. The parameter is the illuminance of the ambient light sensor.

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

tinkerforge dispatch ambient-light-v2-bricklet <uid> illuminance-reached¶

Output:	illuminance – Type: Int, Unit: 1/100 lx, Range: [0 to 232 - 1]

This callback is triggered when the threshold as set by set-illuminance-callback-threshold is reached. The parameter is the illuminance of the ambient light sensor.

If the threshold keeps being reached, the callback is triggered periodically with the period as set by set-debounce-period.