quellen.h

/*
  Basic ESP8266 MQTT example

  This sketch demonstrates the capabilities of the pubsub library in combination
  with the ESP8266 board/library.

  It will reconnect to the server if the connection is lost using a blocking
  reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to
  achieve the same result without blocking the main loop.

  Basis: PubSubClient
*/

/*
Deep Sleep with External Wake Up
=====================================
This code displays how to use deep sleep with
an external trigger as a wake up source and how
to store data in RTC memory to use it over reboots

This code is under Public Domain License.

Hardware Connections
======================
Push Button to GPIO 33 pulled down with a 10K Ohm
resistor

NOTE:
======
Only RTC IO can be used as a source for external wake
source. They are pins: 0,2,4,12-15,25-27,32-39.

Author:
Pranav Cherukupalli <cherukupallip@gmail.com>
*/

//  http://www.arduino.cc/en/Tutorial/AnalogInput
//  http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
//  https://randomnerdtutorials.com/esp32-deep-sleep-arduino-ide-wake-up-sources/
//  https://lastminuteengineers.com/esp32-deep-sleep-wakeup-sources/
//  https://raw.githubusercontent.com/playelek/pinout-doit-32devkitv1/master/pinoutDOIT32devkitv1.png