Add README

README.md

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+# Elevator control
+
+Project for handling elevator button with esp32. Configuration for esphome, without connection to home assistant, mqtt,
+or Wi-Fi
+
+## Features
+
+* Momentary button press
+    * turns on/off light
+    * turns on/off music
+* Lock switch turns fan for 5 minutes
+* Music plays on a loop while light is on
+
+## Pinout
+
+### ESP32
+
+| PIN | Role                       |
+|-----|----------------------------|
+| 1   | UART TX - RX DFPlayer Mini |
+| 3   | UART RX - TX DFPlayer Mini |
+| 14  | Lock status                |
+| 25  | Button                     |
+| 26  | Light relay                |
+| 27  | Fan relay                  |
+| 32  | Up LED                     |
+| 33  | Down LED                   |
+
+### DFPLayer Mini
+
+![dfplayer mini pinout](img/dfplayer%20mini.png)