The easiest way to implement "multi-threaded" app that read multiple sensors with individual sample rates/frequencies using a nRF52840 DK

[Olaf]

Are there any native RTOS build-in the SDK? If I need to develop a sensor device driver (i2c based) any recommendation as the safest way to do that.  Choosing between freeRTOS, Zephyr or ..

[Simonr]

Hi

Zephyr has a sample project for a sensor driver on their GitHub which might be of help. Otherwise the SDK does have freeRTOS support with a few examples, including a Heart Rate Application example, which might be relevant for a sensor driver. 

Best regards,

Simon