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esp8266 as WiFi client
Pi as access point
UDP protocol on esp8266 to talk with Pi
python code to talk with esp8266 using UDP
python UDP implementation On Pi
https://wiki.python.org/moin/UdpCommunication
guide for setup Access Point on Pi
https://learn.adafruit.com/setting-up-a-raspberry-pi-as-a-wifi-access-point/overview
in esp8266 arduino IDE go to example select wifi--> wifiUDPSendReceiveString Example and change #include <WiFi.h> to #include <ESP8266WiFi.h> and Loadit to your nodeMcu..
