Introduction: Blynk and Module ESP8266 With Arduino UNO
The ESP8266 module is a module that allows our micro controller to connect to a WiFi network or to create an access point for our devices.
The application that we will use for our form is "Blynk" downloaded for free from the Play Store. Through "Blynk" we can control the switching on and off of an LED through our WiFi network.
Step 1: Materials and Warnings
Used materials:
- Arduino UNO
- ESP8266
- An Android device
- Cables and a breadboard
It is important to point out before mounting the circuit module that ESP8266 works with 3.3V voltages higher then you risk burning it.
Step 2: Electrical Connections
ESP8266:____________ Arduino:
GND -------------------------- GND
GP2 -------------------------- Non collegato
GP0 -------------------------- GND
RXD -------------------------- Pin 3
TXD -------------------------- Pin 2
CHPD ------------------------ 3.3V
RST -------------------------- Non collegato
VCC -------------------------- 3.3V
LED:____________ Arduino:
Anode -------------------------- GND
Cathode ------------------------Pin 13
Step 3: Sketch
After making the connections we need to download the APP for Android and the library for use with Arduino then go on http://www.blynk.cc/getting-started/
Now that we have the APP installed on our device we should install the library so we download the .zip file and unzip in the directory: C: \ Users \ yourusername \ Documents \ Arduino \ libraries After installing the libraries we open the IDE Aduino we open an empty sketch and copy the sketch from this site:
Step 4: Blynk!
Now we need to download Blynk from google play.
Open Blynk from your smartphone and create our first program as in pictures.
Send via E-mail the Auth Token Code.
Now that we have created our own mini program we would modify the sketch nell'Arduino IDE, so we're going to copy our authtoken in the string:
auth char [] = "YourAuthToken";
in void setup () we find the string:
Blynk.begin (auth, wifi, "SSID", "pass");
it replaces the SSID, the name of our WiFi network and pass the corresponding password. We just now that load our program on Arduino and start the application!
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Sorry for the bad english but we have translated with Google Translate an Italian Article