Blynk App with NodeMcu

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本文說明如何使用Blynk這個App來控制 NodeMcu 的內建LED燈。
This tutorial will teach you how to use Blynk App to control NodeMcu's built-in LED.

需要的器材有：
Needed Material items:

1. 手機 (筆者使用Android手機) Cell Phone (Android Phone was used in this tutorial.)
2. NodeMcu
3. Micro USB Cable

步驟一：
Step 1:

在手機上安裝Blynk App後，需註冊一個帳號，帳戶是使用email當作名稱，密碼自訂，驗証碼(ATUH TOKEN)會寄到這個信箱。
After installing Blynk App on your cell phone, you have to register a new account to receive the ATUH TOKEN.

步驟二：
Step 2:
Arduino IDE 安裝Blynk程式庫
Install Blynk library for Arduino IDE.

由Arduino IDE中開啟檔案 --> 範例 --> Blynk --> Boards_WIFI --> ESP8266_Standalone
In Arduino IDE, open ESP8266_Standalone example which is located at File --> Examples --> Blynk --> Boards_WIFI --> ESP8266_Standalone

檔案需要修改auth、ssid、pass三個地方，修改完成後就可以上傳到 NodeMcu。
According your setting, the auth, ssid, pass are to be modified. Then, you can upload the firmware to NodeMcu.

步驟三：
使用Blynk App設計專案
Use Blynk App to create a new project.

此例只用到一個按鈕作為LED燈的開關，而NodeMcu內建的LED的腳位為D0。

For this tutorial, we only need a switch button to control the built-in LED which is on pin D0.

接著在專案中按下Play按鈕，就可以控制 LED 燈。
You can press the play button(the triangle icon) to control NodeMcu's LED.

結果影片：
Demo video:

參考資料：
References:
[1] http://www.blynk.cc/getting-started/