© 2023 Nexmosphere. All rights reserved. v1.0 / 03-23
All content contained herein is subject to change without prior notice
Nexmosphere
Le Havre 136
5627 SW Eindhoven • The Netherlands
T+31 40 240 7070
Esupport@nexmosphere.com
4
PRODUCT MANUAL | XE AMBIENT LIGHT SENSOR
5. Settings
The XE Ambient Light sensor has multiple settings which determine the behaviour and output of the interface. The settings
can be adjusted by sending X-talk setting commands via the API. After a power cycle, the settings always return back to
default.
X001S[1:2]
X001S[1:4]
Setting 1: Status LED behaviour
2. LED o
4. LED o, blink at trigger (default)
X001S[4:1]
X001S[4:3]
X001S[4:2]
Setting 4: Trigger mode
1. Trigger on range change (default)
2. Trigger on value change (%)
3. No triggers, use data requests
When set to 4:1, the sensor will trigger when the light
intensity reaches another range. When set to 4:2, the
sensor will switch to triggering each time the absolute
light intensity (lux) changes with 1%. When set to 4:3, the
sensor will only trigger when any of the API commands for
data requests are send (see page 3). For more info, please
see section 3, page 2.
X001S[5:X]
Setting 5: Value change percentage trigger
Any number between 1-100
This setting adjusts the percentage that the measured lux
value must change before a trigger is sent. It applies when
setting 4 (trigger mode) is set to 2 (trigger on value change
%).
X001S[6:1]
X001S[6:5]
X001S[6:2]
X001S[6:6]
X001S[6:3]
X001S[6:4]
Setting 6: Sample averaging
1. No averaging
2. Running AVG 2 samples (default)
3. Running AVG 4 samples
4. Running AVG 8 samples
5. Running AVG 16 samples
6. Running AVG 32 samples
7. Running AVG 64 samples
8. Running AVG 128 samples
This setting determines the number of samples which are
averaged to calculate the sensor's output. The higher the
number of samples, the less responsive the sensor will be
to change, but also the more stable in case of challenging
environments. The lower the number of samples, the more
responsive the sensor will be to change. Please note that
typically this setting does not need to be adjusted.
X001S[6:7]
X001S[6:8]
X001S[7:1]
X001S[7:2]
X001S[7:3]
X001S[7:4]
Setting 7: Range mapping
1. Full range (default)
2. Low light
3. Medium light
4. Maximum light
There are four preconfigured range mappings for four
different lighting conditions. See the table below for the
specific light intensity values (lux) per range mapping.
Range Full range Low light Medium light Maximum light
1 0 - 1 lux 0 - 1 lux 0 - 1.000 lux 0 - 10.000 lux
2 1 - 50 lux 1 - 20 lux 1.000 - 2.000 lux 10.000 - 20.000 lux
3 50 - 250 lux 20 - 100 lux 2.000 - 4.000 lux 20.000 - 40.000 lux
4 250 - 1.000 lux 100 - 250 lux 4.000 - 7.000 lux 40.000 - 60.000 lux
5 1.000 - 5.000 lux 250 - 500 lux 7.000 - 14.000 lux 60.000 - 80.000 lux
6 5.000 - 15.000 lux 500 - 1.500 lux 14.000 - 25.000 lux 80.000 - 100.000 lux
7 15.000 - 40.000 lux 1.500 - 4.000 lux 25.000 - 35.000 lux 100.000 - 120.000 lux
8 40.000 - 80.000 lux 4.000 - 8.000 lux 35.000 - 60.000 lux 120.000 - 140.000 lux
9 80.000 - 120.000 lux 8.000 - 12.000 lux 60.000 - 80.000 lux 140.000 - 150.000 lux
Table (setting 7): Light intensity value dierences (in lux) per range mapping
