WiFi Web Server Roomba start
 A simple web server that lets start you a iRobot Roomba via the web.
 This sketch will print the IP address of your WiFi Shield (once connected)
 to the Serial monitor. From there, you can open that address in a web browser
 to start cleaning or dock the roomba.
 If the IP address of your shield is yourAddress:
 http://yourAddress/H sends cleaning command
 http://yourAddress/L sends dock command
 
 This example is written for a network using WPA encryption. For
 WEP or WPA, change the Wifi.begin() call accordingly.
 Circuit:
 * ESP32
 * Roomba wakeup pin attached to pin 5
 * Roomba RXD pin attached to pin 17
 
 created for arduino
ported for esp32 devboard V1
17.02.2019 by www.rohrhofer.org