Add README.md

README.md

+# ESP32 based Dimmer for 4x RGBW LED strips (12/24Volts)
+![Rendered Preview](export/Dimmer.png)
+
+## Features
+* ESP32-WROOM based controller
+* Micropython firmware, *Home assistant* compatible with autodetect
+* 4x RGBW dimmer channels, 12 Bit PWM resolution
+* 12V or 24V operating voltage
+* Header to add a BME280 module for Temperature, Pressure + Humidity measurements
+* Two status LEDs
+* Two user Buttons
+
+## Quickstart
+* Install micropython
+  * https://docs.micropython.org/en/latest/esp32/tutorial/intro.html#deploying-the-firmware
+* Use rshell to connect to the board and copy files 
+  * `pip3 install rshell`
+  * `rshell  -p /dev/ttyUSB0`
+  * `> cp *.py /pyboard`