PIERRE Partner - Brightness Sensor
Description
The PIERRE system supports integration of BH1750 digital brightness sensors through the controller's I²C interface. The sensor measures ambient light levels and provides real-time illumination data for automation, monitoring, and energy management functions.
Purpose
The Brightness Sensor measures ambient illumination and provides lux values for monitoring, visualization, and automation functions.
Configuration
To add a Brightness Sensor:
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Open the desired Controller.
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Navigate to Configurable I/O.
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Select Add I/O.
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Choose Brightness Sensor (BH1750).
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Configure the required parameters:
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Name
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Role
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Identifier
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SDA pin
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SCL pin
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I²C Address - Default is 0
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Save the configuration.
Communication Interface
The BH1750 communicates using the I²C protocol.
| Parameter | Description |
|---|---|
| SDA | Serial Data Line used for data transmission |
| SCL | Serial Clock Line used for bus synchronization |
| Address | I²C device address used for communication - Default is 0 |
Multiple sensors can be connected to the same I²C bus if unique addresses are configured.
Automation Integration
Brightness values can be used as conditions or triggers within automation logic.
Examples:
Lighting Control
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Turn lights ON when brightness falls below a defined threshold.
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Turn lights OFF when sufficient daylight is available.
Blind and Shading Control
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Lower blinds when brightness exceeds a configured value.
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Raise blinds when brightness decreases.
Energy Management
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Optimize artificial lighting based on available natural daylight.
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Reduce unnecessary energy consumption.
Editing a Brightness Sensor
To modify an existing sensor:
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Open the corresponding Controller.
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Navigate to Configurable I/O.
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Select the desired Brightness Sensor.
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Modify the required parameters.
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Save the changes.
The sensor can also be removed from the system if it is no longer required.
Technical Notes
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Sensor type: BH1750
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Communication protocol: I²C
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Requires SDA and SCL connections
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Supports configurable I²C addressing
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Measured values are available for dashboards, logic functions, and automation rules
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Available functionality may depend on the controller model and firmware version
Add Brightness sensor - BH1750
New Brightness sensor can be added in a few steps.
Select Controller
Select the Controller from the list to add a new I/O.
To edit an existing I/O, select the Controller to which the I/O is assigned.
Configurable I/O
In the Configurable I/O tab, tap Add to create a new I/O or select an existing I/O from the list to edit it.
Choose type - Configurable I/O list
Select the I/O device type from the list.
New or existing Brightness sensor - BH1750
Fill the following form:
- Name - Define the name of the Brightness sensor.
- Role - Select the Role from the list.
- Identifier - This field is the identifier of the I/O in the electrical project.
- SDA - Used to send and receive data in I²C serial bus communication.
- SCL - Used to keep all devices on the I²C bus synchronized while data is being transferred.
- Address - Use -/+ to set it.
For more details follow next steps.
To confirm your choice tap Submit or Save.
Select Roles
Select one or more Roles by using the checkboxes.
Tap Done/Save to confirm your selection.
SDA - Serial Data Line
In this step, select the Pin connected to the end device SDA line.
Tap the radio button next to the desired Pin, then tap Done/Save to confirm.
SCL - Serial Clock Line
In this step, select the Pin connected to the end device SCL line.
Tap the radio button next to the desired Pin, then tap Done/Save to confirm.
