The WisBlock Ambient Light Sensor – RAK1903 is a compact, low-power module based on the Texas Instruments OPT3001, designed to deliver accurate ambient light measurement from 0.01 lux to 83,865 lux. Its optical filtering closely matches the human eye, making it ideal for real-world illumination sensing indoors or outdoors.
 
When paired with a WisBlock Core (e.g., RAK4631), it becomes a complete IoT-ready light measurement system capable of transmitting data using LoRaWAN®, LoRa P2P (Point-to-Point) or BLE. Ultra-low power operation and WisBlock power-down control make it suitable for battery-powered or long-life solar deployments.
 
📍 Note: This sensor is part of the WisBlock Sensor category and requires a WisBlock Base Board for operation.
 
KEY FEATURES
 
 
Wide 0.01–83,865 lux range
Measures everything from moonlight-level darkness to bright outdoor sunlight.
 
Accurate TI OPT3001 sensing
Human-eye-matched spectral response for reliable illumination monitoring.
 
Ultra-low power consumption
Ideal for battery or solar-powered IoT nodes with full WisBlock power-down support.
 
Plug-and-play WisBlock integration
Simply mount into a sensor slot — no soldering or complex setup.
 
Compact 10 mm module
Small footprint for dense sensor stacks or tight enclosure spaces.
 
Stable digital output
I²C interface avoids analogue drift and ensures consistent long-term performance.
 
IDEAL FOR
Smart greenhouses and horticulture lighting control
Indoor environment monitoring and building automation
Light-triggered alarms or event detection
Smart street lighting and outdoor illumination measurement
Low-power battery or solar IoT nodes
Multi-sensor WisBlock environmental stations