Upload to ESP8266 failing. - Avrdude, stk500, Bootloader issues - Arduino Forum
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ESP8266 Setup Tutorial using Arduino
WAVGAT UNO R3 + WiFi ATmega328P+ESP8266 (32Mb memory) USB TTL CH340G For Arduino Uno NodeMCU WeMos ESP8266 One New Arrival|Integrated Circuits| - AliExpress