Thanks for your reply. Yes, the sensor is located on top and is within the 2.75m height (around 1.5m). Position of human is exactly under the sensor.
I did some tests and discovered some changes in behaviour of different boards. I bought 5 brand new boards, all of them are exactly the same, some of them don’t come up with OUTBED or INBED and some do. The sleep statue is only working if I’m powering the sensor with my laptop and waiting for at least 30 mts.
Basically in my code there is something like ModeSelect_fuc(2); to set the sensor in the sleep mode. then in the loop I’m calling the SleepInf_Decode() and the implementation is exactly the same as the documentation.