maybe in myconfig.h put power at max
#define RF24_PA_LEVEL RF24_PA_MAX
all grounds connected ? external source and arduino source ?
@danta, this device can detect you when you are in another room ?
detection delay can be adjusted from 1 second to hundreds of second (two minutes max) by adjusting R6 resistor on the board as explained on this Taobao page (Chinese). By default there’s no resistor and the delay is 30 seconds, and you can adjust the delay by using 1K to 250K resistor.
u can use this trick to use usb power