BH1749: Ambient Light Sensor IC

This sample application sets up the BH1749 color sensor to provide 8-bit measurement data every time a set threshold value (>50) is reached for the RED color channel. It also shows how to enable interrupt every time data is ready, instead of threshold trigging.


The sample supports the following nRF9160-based device:

Hardware platforms


Board name

Build target





Building and Running

This project outputs sensor data to the console. It requires a BH1749 sensor. It should work with any platform featuring a I2C peripheral interface. It does not work on QEMU. The example below uses the Thingy:91.

This sample can be found under samples/sensor/bh1749 in the nRF Connect SDK folder structure.

See Building and programming a sample application for information about how to build and program the application.

Sample Output

J-Link RTT Viewer

 device is 0x20022384, name is BH1749

 Threshold trigger

 BH1749 RED: 387

 BH1749 GREEN: 753

 BH1749 BLUE: 397

 BH1749 IR: 81

 (continues when trigger level reached)