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Step 1: Components
1.Wemos D1 mini or Nodemcu
2.phone & computer.
4.latest arduino ide
Step 2: Wemos Drivers
if you are using wemos d1 mini first time you have to install USB drivers.
Download drivers from here
Install the drivers.
Step 3: Adding Board to Arduino IDE
To write & upload code for wemos you have to add the wemos board to your Arduino Ide.
In Arduino Ide.Go to File --> preferences add below URL to the Addition Boards Manager URL
Goto Tools/Board Manager
In board manager search for esp.
Step 4: Setup Your Blynk App
create the new account on blynk app.then select buttons according to your requirement and select pins on which led is connected.
email your token to your Gmail account.
Step 5: Blynk Library
Download Blynk library.
unzip this zip file and copy all the folders present in libraries folder and paste it to arduino ide/ libraries.
Step 6: Sketch Upload
Go to Examples/Blynk/Board_Wiffi/Nodecmu
Open Nodemcu sketch.
Enter your Blynk Authtoken & your wifi credentials.
Upload the sketch.