Arduino and hc12 Wireless communication

Projects General Guidance
1

I recently decided to start working with wireless communication with Arduino UNO. I decided to go with the HC-12 wireless communication board and bought it. I could not find a proper tutorial oh how to use it. I would be pleased if you could give me a simplest circuit like turning on an led wirelessley with the code. I will be able to develop it afterwards. Thank you in advance.

2

You have tried google ? For example:

3

1. Build the HC12 + UNO + NANO based circuit as follows.
hc12x.png

2. Upload the following Sketches in UNO and NANO.

UNO Codes:

#include <SoftwareSerial.h>
SoftwareSerial SUART(10, 11); //RX, TX


void setup()
{
  Serial.begin(9600);
  SUART.begin(9600);
}

void loop()
{
  if (Serial.available() > 0)
  {
    byte x = Serial.read();  //x = 0x35
    SUART.write(x); //goes 0x35
  }

}

NANO Codes:

#include <SoftwareSerial.h>
SoftwareSerial SUART(10, 11); //RX, TX


void setup()
{
  Serial.begin(9600);
  SUART.begin(9600);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
}

void loop()
{
  if(SUART.available()>0)
  {
    byte x = SUART.read();  //x = 0x35
    //Serial.print(x, HEX);
    //while(1);
    x = (x - '0');
    for (int i= 0; i<x; i++)
    {
      digitalWrite(13, HIGH);
      delay(1000);
      digitalWrite(13, LOW);
      delay(1000);
    }
    digitalWrite(13, LOW);
  }
}

3. Open SM1 at 9600 Bd with 'No line ending' tab enabled.

4. Enter 5 in the InputBox of UNO and click on send Button.

5. Check that L (built-in LED of NANO) blinks for 5 times.

6. Repeat Step-4 with some other value <= 9.

hc12x.png