+-------------------------------------------------------------+
|  WeMos D1 Mini  ---  wasserpir                              |
+-------------------------------------------------------------+
|  Rails: 5V, 3V3, GND                                        |
|                                                             |
|  pir1  [HC-SR501 PIR motion sensor]  -- Wasserstein Motion  |
|    VCC   -> rail 5V                                         |
|    GND   -> rail GND                                        |
|    OUT   -> D2                                              |
|                                                             |
|  BOM:                                                       |
|    - WeMos D1 Mini                                          |
|    - HC-SR501 PIR motion sensor  (pir1)                     |
|                                                             |
|  Power: ~50mA typical, ~65mA peak (budget 500mA)  OK        |
|                                                             |
|  Warnings: none                                             |
+-------------------------------------------------------------+
