8051 interface with PIR (Passive Infra-red) sensor

[gogreen]

Folks,

For some reason, the port is not turning on. I am quite sure that the signal from PIR is coming right. If I connect the PIR out to the relay board, the light turns on.

When I connect the PIR out to the 8051 board, the port is not turned on (I tried all 4 ports). In the function main() if I forcefully turn it on to say "P1 = 1" even then the port is not turning on.

Any ideas why?

Gogreen.

[KSHATRIYA]

Check it with other micro ,If its not working then ,give me the link of  the sensor (datasheet) let me check.