Introduction: Arduino Lux Meter - Interfacing OPT3001 With Arduino
We generally face situation, where we need to measure intensity of light. So I decided to make a small project which will help us solve this problem. This project illustrates how we can use OPT3001 with Arduino as Lux meter. In this project, I have used small breackout board for OPT3001. This sensor is communicating over I2C protocol.
Few advantages are:
- Precision Optical
- FilteringAutomatic Full-Scale Setting Feature
- Measurements: 0.01 lux to 83 k luxLow
- Operating Current: 1.8 μA
Step 1: List of Things I Used
- Arduino Uno as main controller.
- OPT3001 from Texas Instruments.
- Jumper wires
- Computer with Arduino IDE installed.
That's it, lets move to hardware connection.
Step 2: Step 2: Hardware Connection.
Now we will see how we can connect Arduino uno and OPT3001 via I2C line.
- Power lines
- VDD -- 3.3 V
- GND -- GND
- SDA -- A4
- SCL -- A5
Step 3: Step 3: Code Snippet for Arduino Uno As Lux Meter
Upload this code into Arduino uno.
Complete link for this project is at:
Step 4: Step 4: Check Output
Once done, open Serial terminal and check the data coming from sensor,
Your should get it as shown.
Question 6 months ago on Step 4
How can I get it to read to three decimal places? Really want to get readings from 0.00 to 0.01 in very low light conditions as in light pollution applications. Any help greatly appreciated. Thanks, Glen.