Hi
In My Project i am using NRF24L01 for communication between two Arduino.
At receiver side i have made my PIN 10 as output. In few article i have read that pin 10 should be always HIGH.
Pin 10 will go high only when i receive some data from transmitter or it will be low always.
Can someone please suggest me am i doing wrong?
Can someone please suggest me am i doing wrong?
Not without seeing your code
Read this before posting a programming question
Also take a look at Simple nRF24L01+ 2.4GHz transceiver demo
Here is my receiver code
#include <avr/sleep.h>
#include <avr/power.h>
#include <avr/wdt.h>
#include <SPI.h>
#include "RF24.h"
#define LED_TILT 9
#define LED_VOLTAGE 10
#define LED_SIREN 4
#define HIGH_BATTERY 220
float pressLength_milliSeconds = 0;
int optionOne_milliSeconds = 100;
int optionTwo_milliSeconds = 2000;
unsigned long previousMillis = 0;
long interval = 1000;
int buttonPin = 6;
int SIREN = 3;
int BUZZER = 5;
int counter = 0;
struct DataPacket
{
int voltage;
bool tilt;
};
const uint64_t talking_pipes[2] = { 0xF0F0F0F0D5LL, 0xF0F0F0F0C6LL };
const uint64_t listening_pipes[2] = { 0x3A3A3A3AD5LL, 0x3A3A3A3AC6LL };
DataPacket data[2];
unsigned long lastMilis[2];
RF24 radio(7,8);
void watchdogSetup(void)
{
wdt_reset();
WDTCSR = bit (WDCE) | bit (WDE);
WDTCSR = bit (WDCE) | bit (WDE) | bit (WDIE) | bit (WDP3) | bit (WDP0); // set WDIE, and 8 seconds delay
}
void setup()
{
Serial.begin(9600);
pinMode(LED_TILT, OUTPUT);
pinMode(LED_VOLTAGE, OUTPUT);
pinMode(buttonPin, INPUT);
pinMode(SIREN, OUTPUT);
pinMode( LED_SIREN, OUTPUT);
pinMode(BUZZER, OUTPUT);
digitalWrite(SIREN,HIGH);
digitalWrite(BUZZER,LOW);
radio.begin();
radio.setPALevel(RF24_PA_MAX);
radio.setDataRate(RF24_250KBPS);
radio.setChannel(108);
radio.openReadingPipe(1,talking_pipes[0]);
radio.openReadingPipe(2,talking_pipes[1]);
radio.startListening();
data[0].voltage = 500;
data[0].tilt = 1;
data[1].voltage = 500;
data[1].tilt = 1;
lastMilis[0] = 0;
lastMilis[1] = 0;
Serial.println("Initialisation complete.");
}
void loop()
{
uint8_t pipe_num;
if ( radio.available(&pipe_num) )
{
unsigned long got_time;
bool done = false;
Serial.println( pipe_num, DEC);
radio.read(&data[pipe_num - 1], sizeof(DataPacket) );
lastMilis[pipe_num - 1] = millis();
Serial.println(data[pipe_num - 1].voltage, DEC);
Serial.println(data[pipe_num - 1].tilt, DEC);
radio.stopListening();
radio.openWritingPipe(listening_pipes[pipe_num-1]);
radio.write( &got_time, sizeof(unsigned long) );
printf("Sent response to %04x.\n\r",pipe_num);
radio.startListening();
}
unsigned long currentMillis = millis();
if (currentMillis > (lastMilis[0] + 100000))
{
data[0].voltage = 0;
}
if (currentMillis > (lastMilis[1] + 100000))
{
data[1].voltage = 0;
}
if (currentMillis > (lastMilis[0] + 600000))
{ data[0].tilt = true;
// digitalWrite(SIREN,HIGH);
digitalWrite(BUZZER, LOW);
digitalWrite(LED_SIREN, LOW);
digitalWrite(LED_TILT, LOW);
}
if (currentMillis > (lastMilis[1] + 600000))
{ data[1].tilt = true;
//digitalWrite(SIREN,HIGH);
digitalWrite(BUZZER, LOW);
digitalWrite(LED_SIREN, LOW);
digitalWrite(LED_TILT, LOW);
}
// SIRE ON BUT NOT OFF
if ((!data[0].tilt) || (!data[1].tilt))
digitalWrite(LED_SIREN, HIGH);
// TILT TO GPS AND BUZZER
if ((data[0].tilt) && (data[1].tilt))
{
digitalWrite(LED_TILT, LOW);
//digitalWrite(BUZZER, LOW);
}
else
if ((!data[0].tilt) && (!data[1].tilt))
{ digitalWrite(LED_TILT, HIGH);
digitalWrite(BUZZER, HIGH);
Serial.println ("BOTH CAP OPEN ");
}
else
{
if (!data[0].tilt)
interval = 5000;
else
interval = 10000;
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval)
{
previousMillis = currentMillis;
if (digitalRead(LED_TILT) == LOW)
{
digitalWrite(LED_TILT, HIGH);
digitalWrite(BUZZER, HIGH);
Serial.println (" ONE CAP OPEN ");
}
else
{
digitalWrite(LED_TILT, LOW);
//digitalWrite(BUZZER, LOW);
}
}
}
if ((data[0].voltage >= HIGH_BATTERY) && (data[1].voltage >= HIGH_BATTERY))
{
digitalWrite(LED_VOLTAGE, LOW);
//digitalWrite(BUZZER, LOW);
}
else if ((data[0].voltage < HIGH_BATTERY)&& (data[1].voltage < HIGH_BATTERY))
{
digitalWrite(LED_VOLTAGE, HIGH);
digitalWrite(BUZZER, HIGH);
Serial.println ("BUZZER ON BOTH CONNECTION LOST ");
}
else
{
if ((data[0].voltage < HIGH_BATTERY))
interval = 10000;
else
interval =20000;
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval)
{
previousMillis = currentMillis;
if (digitalRead(LED_VOLTAGE) == LOW)
{
digitalWrite(LED_VOLTAGE, HIGH);
digitalWrite(BUZZER, HIGH);
Serial.println ("BUZZER ON ONE CONNECTION LOST ");
}
else
{
digitalWrite(LED_VOLTAGE, LOW);
//digitalWrite(BUZZER, LOW);
}
}
}
{
while (digitalRead(buttonPin) == HIGH )
{
delay(100);
pressLength_milliSeconds = pressLength_milliSeconds + 100;
Serial.print("ms = ");
Serial.println(pressLength_milliSeconds);
}
if (pressLength_milliSeconds >= optionTwo_milliSeconds)
{
digitalWrite(LED_SIREN, LOW);
digitalWrite(SIREN,HIGH);
if ((data[0].tilt) && (data[1].tilt))
{digitalWrite(LED_TILT, LOW);
Serial.print ("siren connection oN ");
digitalWrite(BUZZER, LOW);
}
}
else if(pressLength_milliSeconds >= optionOne_milliSeconds)
{
digitalWrite(SIREN,LOW);
Serial.print ("siren connection oFF ");
digitalWrite(BUZZER, HIGH);
}
pressLength_milliSeconds = 0;
}
}
Hi,
Have you got some basic NRF codes that JUST checks the NFR units and communications?
Tom... 
Pin 10 just needs to be set as OUTPUT. And it does not have to be used for the nRF24 - it can be used for anything that needs an OUTPUT pin. You can use any Arduino pins for CE and CSN.
...R