ADPD188 Smoke Detection Configuration Not Responding to Smoke

We are currently evaluating the ADPD188BI sensor for smoke detection applications and are using the smoke detection configuration provided in the official Analog Devices driver repository.

We have successfully initialized the device and are able to read sensor data over I2C. The sensor appears operational, and FIFO/sample reads are functioning correctly. However, when the sensor is exposed to smoke, we are not observing any noticeable change in the blue or IR measurement values.

Our setup is based closely on the provided smoke_detect_setup() example configuration from the ADPD188 driver library. We are using:

• Slot A configured for Blue LED
• Slot B configured for IR LED
• 32-bit sum FIFO mode
• 16 Hz sampling frequency
• Default smoke detection timing/integration settings from the reference implementation