Hi all, i have read the X4M300 presence sensor module. I found out that if we enable the IO, the output pin 11 will give a (high) when no presence and low output when presence. So, i tested it with a simple led circuit with the pin 11(output) connect to positive, and the pin 2 (ground) connect to the negative with a resistor in the circuit. My findings is that the led isnt light up even there is no presence (high output). Can anybody help me what im missing here? Thank you.