Introduction: Arduino Bluetooth Control Basic Tutorial
In this tutorial I'll show you, How to control Arduino with your smart phone using, My app developed with app inventor 2.
Step 1: Things You Need
Hardware
- Arduino
- Bluetooth Module HC 05/06
- LED
- 220Ω Resistor
- 2.2KΩ Resistor
- 4.7Ω Resistor
- Android device
Software
- Arduino IDE
- App Inventor 2 (for create your app).
Step 2: Watch the Video Tutorial
Step 3: Schematics
The circuit is so simple:
Arduino Pins: Breadboard: Resistor: Bluetooth Module:
- RX (Pin 0)--------------------------2.2KΩ--------------TX
- TX (Pin 1)------------------------------------------------RX
- 5v-----------------------------------------------------------5v
- Gnd--------------------------------------------------------Gnd
- Pin2,Gnd-------Led----------------220Ω
- RX------------------------------------4.7Ω---------------Gnd
Notes and Tips: You need to remove the RX and TX cables when you’re uploading the sketch to your Arduino.
If the HC-05 Bluetooth Module asks for a password, It’s’1234′.
Sometimes people connect the TX from the bluetooth module to the TX of the Arduino… that’s wrong and it won’t work. Make sure you connect it properly, the TX into RX and the RX into the TX.
Step 4: Arduino Sketch
int ledblue=2;
int tx=1;
int rx=0;
char inSerial[15];
void setup(){ Serial.begin(9600);
pinMode(ledblue, OUTPUT);
pinMode(tx, OUTPUT);
pinMode(rx, INPUT);
allpinslow();
}
void loop()
{ int i=0;
int m=0;
delay(500);
if (Serial.available() > 0) { while (Serial.available() > 0) { inSerial[i]=Serial.read();
i++; }
inSerial[i]='\0';
Check_Protocol(inSerial); }}
void allpinslow() { digitalWrite(ledblue, HIGH);
digitalWrite(ledblue, LOW); } void Check_Protocol(char inStr[]){ int i=0;
int m=0;
Serial.println(inStr);
if(!strcmp(inStr,"2off")){ //Led Off allpinslow();
digitalWrite(ledblue, LOW); Serial.println("Blue Off");
for(m=0;m<11;m++){ inStr[m]=0;} i=0;} if(!strcmp(inStr,"2on")){ //Led on allpinslow();
digitalWrite(ledblue, HIGH);
Serial.println("Blue on"); for(m=0;m<11;m++){ inStr[m]=0;} i=0;} else{ for(m=0;m<11;m++){ inStr[m]=0; } i=0;
}}
Step 5: Android Application
App Inventor 2 project file:Designer and Blocks code.