http://www.martyncurrey.com/arduino-serial-part-3-getting-started-with-serial-communication/
Serial communication between ESP8266 and Aruino Uno
http://arduino.esp8266.com/Arduino/versions/2.0.0/doc/reference.html
https://techtutorialsx.com/2016/12/11/esp8266-external-interrupts/
https://forum.arduino.cc/index.php?topic=616264.0
https://www.google.com/search?q=wemos+d1+mini+pinout&client=ubuntu&hs=mKM&channel=fs&tbm=isch&source=iu&ictx=1&fir=HI8V5x7XNyIhnM%253A%252CSnlcq4QotyYk3M%252C_&vet=1&usg=AI4_-kQGWGLdSbahE5I7UK8Rp8jy684mOQ&sa=X&ved=2ahUKEwjBs5HT1uLjAhVH46QKHSetBQMQ9QEwAHoECAcQBA#imgrc=Dg6wDTbYSO7BNM:&vet=1
http://www.ti.com/lit/ds/symlink/sn54121.pdf
Voor het ordenen van fotobestanden.
How to Communicate with ESP8266 via Arduino UNOESP8266 Arduino Communication
Teensyduino Main Download+Install Basic Usage Digital I/O PWM & Tone Timing USB Serial USB Keyboard USB Mouse USB Joystick USB MIDI USB Flight Sim Serial Libraries
SENSUS xylem brand
https://sensus.com/products/620-water-meter/
https://sensus.webdamdb.com/bp/#/search/?q=%22620%20Water%20Meter%22&filters=%257B%257D
Tweakersnet
https://gathering.tweakers.net/forum/list_messages/1595957
https://gertvanvoorst.nl/domotica_hw_slimmemeter.html
Github beginners guide to OTA
https://www.banggood.com/Geekcreit-UNOWiFi-R3-ATmega328PESP8266-32Mb-Memory-USB-TTL-CH340G-Module-For-Arduino-Uno-NodeMCU-ESP8266-p-1205444.html?rmmds=search&cur_warehouse=CN
Table DIP- switch:
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