if (!driver.init())

Serial.println("init failed");

}

void loop()

{

const char *msg = "Hello World!";

driver.send((uint8_t *)msg, strlen(msg));

driver.waitPacketSent();

delay(1000);

}

How the transmitter sketch works

First, we need to include the RadioHead ASK library.

#include <RH_ASK.h>

This library needs the SPI library to work. So, we also need to include the SPI library.

#include <SPI.h>

After that, we create a RH_ASK object called driver.

In the setup() we initialize the RH_ASK object by using the init() method. We use

an ifstatement and a print in the Serial Monitor for debugging purposes.

Serial.begin(9600); // Debugging only

if (!driver.init())

Serial.println("init failed");

In the loop(), we write and send our message. Here, our message is saved on

the msgvariable. Please note that the message needs to be a char type.

const char *msg = "Hello World!";

This message contains the “Hello World!” message, but you can send anything you

want as long as it is in char format.

Finally, we send our message as follows:

driver.send((uint8_t *)msg, strlen(msg));

driver.waitPacketSent();

The message is being sent every second, but you can adjust this delay time.

delay(1000);

Receiver Circuit