5$ Arduino WiFi Module!? ESP8266 mini Tutorial/Review

[esp8266 forum]

[ESP8266 ARDUINO TUTORIAL – WIFI MODULE COMPLETE REVIEW]

[LGDEHOME 4Pcs ESP8266 Serial Esp-01 WIFI Wireless Transceiver Send Receive LWIP AP+STA]

[spec]

[Arduino to ESP8266 By Serial Communication] changed to the factory 115200 baud.

[Arduino outputs garbage values on serial monitor with ESP8266]
[ESP8266 shows garbage in serial monitor]

[ESP8266 SDK]

[8266 Flash Download Tools]

Ready
AT+GMR
AT version:1.2.0.0(Jul  1 2016 20:04:45)
SDK version:1.5.4.1(39cb9a32)
Ai-Thinker Technology Co. Ltd.
Dec  2 2016 14:21:16
OK