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By Gowtham
#72936 In this website it is explained in step by step how to give connections and how to flash esp8266 to avoid garbage values

1. To flash ESP8266:
https://mybtechprojects.tech/microcontrollers/esp8266/flash-esp8266-with-arduino/
2. To connect esp8266 with arduino:
https://mybtechprojects.tech/microcontrollers/esp8266/interface-esp8266-01-with-arduino/