Hello, I am currently trying to use the nRF24L01 along with this tutorial. The nRF24L01 - Wireless Joystick for Arduino Robot Car with nRF24L01+ - YouTube It basically is for using two nRF24L01 modules and a joystick to control a vehicle with two motors and an l298n motor controller but first he goes through some nrf24l01 receive and send tests. I was able to get this to work with my two arduinos. An error occured with my IDE so i reinstalled it. Now when I try to run the send/receive example sketches I receive errors. The client (sending) module first reads on the serial monitor (init failed) then begins to try to send data whereas the server (receiving) module only says (init failed) and that's it. I have no idea what I'm doing wrong and I don't believe i've done anything different than before. The radiohead library must be downloaded for this. Here are my sketches. They are example sketches off of the radiohead library.
NRF 24 CLIENT
// nrf24_client.pde
// -*- mode: C++ -*-
// Example sketch showing how to create a simple messageing client
// with the RH_NRF24 class. RH_NRF24 class does not provide for addressing or
// reliability, so you should only use RH_NRF24 if you do not need the higher
// level messaging abilities.
// It is designed to work with the other example nrf24_server.
// Tested on Uno with Sparkfun NRF25L01 module
// Tested on Anarduino Mini (http://www.anarduino.com/mini/) with RFM73 module
// Tested on Arduino Mega with Sparkfun WRL-00691 NRF25L01 module
#include <SPI.h>
#include <RH_NRF24.h>
// Singleton instance of the radio driver
RH_NRF24 nrf24;
// RH_NRF24 nrf24(8, 7); // use this to be electrically compatible with Mirf
// RH_NRF24 nrf24(8, 10);// For Leonardo, need explicit SS pin
// RH_NRF24 nrf24(8, 7); // For RFM73 on Anarduino Mini
void setup()
{
Serial.begin(9600);
while (!Serial)
; // wait for serial port to connect. Needed for Leonardo only
if (!nrf24.init())
Serial.println("init failed");
// Defaults after init are 2.402 GHz (channel 2), 2Mbps, 0dBm
if (!nrf24.setChannel(1))
Serial.println("setChannel failed");
if (!nrf24.setRF(RH_NRF24::DataRate2Mbps, RH_NRF24::TransmitPower0dBm))
Serial.println("setRF failed");
}
void loop()
{
Serial.println("Sending to nrf24_server");
// Send a message to nrf24_server
uint8_t data[] = "Hello World!";
nrf24.send(data, sizeof(data));
nrf24.waitPacketSent();
// Now wait for a reply
uint8_t buf[RH_NRF24_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if (nrf24.waitAvailableTimeout(500))
{
// Should be a reply message for us now
if (nrf24.recv(buf, &len))
{
Serial.print("got reply: ");
Serial.println((char*)buf);
}
else
{
Serial.println("recv failed");
}
}
else
{
Serial.println("No reply, is nrf24_server running?");
}
delay(400);
}
NRF 24 SERVER
// nrf24_server.pde
// -*- mode: C++ -*-
// Example sketch showing how to create a simple messageing server
// with the RH_NRF24 class. RH_NRF24 class does not provide for addressing or
// reliability, so you should only use RH_NRF24 if you do not need the higher
// level messaging abilities.
// It is designed to work with the other example nrf24_client
// Tested on Uno with Sparkfun NRF25L01 module
// Tested on Anarduino Mini (http://www.anarduino.com/mini/) with RFM73 module
// Tested on Arduino Mega with Sparkfun WRL-00691 NRF25L01 module
#include <SPI.h>
#include <RH_NRF24.h>
// Singleton instance of the radio driver
RH_NRF24 nrf24;
// RH_NRF24 nrf24(8, 7); // use this to be electrically compatible with Mirf
// RH_NRF24 nrf24(8, 10);// For Leonardo, need explicit SS pin
// RH_NRF24 nrf24(8, 7); // For RFM73 on Anarduino Mini
void setup()
{
Serial.begin(9600);
while (!Serial)
; // wait for serial port to connect. Needed for Leonardo only
if (!nrf24.init())
Serial.println("init failed");
// Defaults after init are 2.402 GHz (channel 2), 2Mbps, 0dBm
if (!nrf24.setChannel(1))
Serial.println("setChannel failed");
if (!nrf24.setRF(RH_NRF24::DataRate2Mbps, RH_NRF24::TransmitPower0dBm))
Serial.println("setRF failed");
}
void loop()
{
if (nrf24.available())
{
// Should be a message for us now
uint8_t buf[RH_NRF24_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if (nrf24.recv(buf, &len))
{
// NRF24::printBuffer("request: ", buf, len);
Serial.print("got request: ");
Serial.println((char*)buf);
// Send a reply
uint8_t data[] = "And hello back to you";
nrf24.send(data, sizeof(data));
nrf24.waitPacketSent();
Serial.println("Sent a reply");
}
else
{
Serial.println("recv failed");
}
}
}
I also included pictures of the respective serial monitors. Thank you for any help!
Moderator edit:
</mark> <mark>[code]</mark> <mark>
</mark> <mark>[/code]</mark> <mark>
tags added.
