uint8_t buflen = sizeof(buf);

if (driver.recv(buf, &buflen)) // Non-blocking

{

int i;

// Message with a good checksum received, dump it.

Serial.print("Message: ");

Serial.println((char*)buf);

}

}

How the receiver sketch works

Similarly to the previous sketch, you start by including the necessary libraries:

#include <RH_ASK.h>

#include <SPI.h>

You create a RH_ASK object called driver:

RH_ASK driver;

In the setup(), we initialize the RH_ASK object.

void setup(){

Serial.begin(9600); // Debugging only

if (!driver.init())

Serial.println("init failed");

}

In the loop()

, we need to set a buffer that matches the size of the message we’ll

receive. “Hello World!” has 12 characters. You should adjust the buffer size accordingly

to the message you’ll receive (spaces and punctuation also count).

uint8_t buf[12];

uint8_t buflen = sizeof(buf);

Then, we check if we received a valid message. If we receive a valid message, we print

it in the serial monitor.

if (driver.recv(buf, &buflen)) {

int i;

// Message with a good checksum received, dump it.

Serial.print("Message: ");

Serial.println((char*)buf);

}