+--------------------------+
        |   ESP01                  |
        |                          |
        |                          |
        |                          |          +----------------+
        |                          |          |                |
        |                          |          |                |  
        |                          |          |           +----------+
        |                          |          |           |  VCC     |
        |   1     3     5     7    |      ---------       |          | Set time setting to about 2min (trimmer potentiometer) 
  +---------+-+   +-+   +-+   +-+  |        ----- 1.5V    |          |
  |     |   +-+   +-+   +-+   +-+  |          |           |PIR-SENSOR|
  |     |                |         |          |           |          |
  |     |   2     4     6|    8    |          |           |          |
  |     |   +-+   +-+   +-+   +-+ ------------+           |GND    SIG|
  |     |   +-+   +-+   +-+   +-+  |          |           +----------+
  |     |          |     |     |   |          |             |      |
  |     |          |     +-----+   |          |             |      |
  |     +----------|---------------+      ---------         |      |
  |                |                        -----  1.5V     |      |
  |                |                          |             |      |
  |                |                          |             |      |
  |                |                      ---------         |      |
  |                |                        -----  1.5V     |      |
  |                |                          |             |      |
  |                |                          |             |      |
  +----------------|--------------------------+-------------+      |
                   |                                               |
                   +-----------------------------------------------+

1 GND
2 TXD
3 GPIO2
4 CHIP_EN
5 GPIO0
6 RESET
7 GPIO03
8 VCC