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ESP8266Station is a small Arduino sketch to use an ESP8266 as transparent WiFi bridge for connecting serial controllers like Grbl-L to Wi-Fi.

Flashing:

Read Flashing the sketches to flash the Arduino and ESP8266 software. The software is tested, read Test Information.
If you PC application doesn't support a Wi-Fi connection, you can use this program to create a virtual serial port on your PC that connects to an IP-Address (Wi-Fi connection).
If you can make your own PCB's, have a look at the breakout boards and shield for some boards.

Level converter and breakout boards:

The HC0X and ESP8266 modules accept max 3.3 volts inputs. A straight connection to the Arduino will destroy them. To connect these modules you need a level converter on the RX input of the modules. Because a mistake is easy made, I also use a level converter on the TX output of the modules. For easy connection I made breakout boards with level converters and an IDC6 (flat cable connector).
If can not make your own boards, buy a level converter they are cheap and easy to use. Buy the BOB-12009 from SparkFun or look on eBay.

Issues:

Use Issues to report any problem.