Multiple Nodes NRF24L01

Multiple Nodes nRF24L01+ Wireless Temperature DS18B20 wit !rduino "N# $2 Transmitter % 1 Re&ei'er(  11 January 2016 admin Arduino UNO, DS18B20, LCD Display, Multi Cann!ls, Multipl! Nod!s, n"#2$L01% ,  &  &!mp!ratur !mp!ratur! !

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nRF24L01+ DS18B20 &  &!mp!ratur !mp!ratur! ! S!nsor '2C LCD display 16(2 Arduino UNO $)*+ r!sistor

Li*rar n"#2$L01 Lirary "#2$ Lirary Dallas&!mp!ratur! Lirary Li-uidCrystal.'2C Lirary /ir! Lirary

Wirin, Wire nRF24L01+ to Arduino UNO

GND <–> GND VCC <–> Arduino 3.3V CE <–> Arduino pin 9 CSN <–> Arduino pin 10 SCK <–> Arduino pin 13 MOS <–> Arduino pin 11 MSO <–> Arduino pin 1!

nRF24L01+ DS18B20 TX 1

nRF24L01+ DS18B20 TX 2

nR F24L01+ RX "Mu#tip#e Node

%$-ode Upload Code to TX 1 #include #include "nRF24L01.h" #include "RF24.h" #include #include

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS); DallasTemperature sensors(&oneWire);

float temp1;

RF24 radio(9, 10); const uint64_t pipes[3] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0E2LL, 0xF0F0F0F0E3LL };

void setup(void) { Serial.begin(9600); sensors.begin(); radio.begin(); radio.setDataRate(RF24_250KBPS); radio.openWritingPipe(pipes[1]); radio.startListening(); }

void loop(void) { sensors.requestTemperatures(); temp1 = sensors.getTempCByIndex(0);

radio.write(&temp1, sizeof(temp1)); delay(10); }

Upload Code to TX 2 #include #include "nRF24L01.h" #include "RF24.h" #include #include

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS); DallasTemperature sensors(&oneWire);

float temp2;

RF24 radio(9, 10); const uint64_t pipes[3] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0E2LL, 0xF0F0F0F0E3LL };

void setup(void) {

Serial.begin(9600); sensors.begin(); radio.begin(); radio.setDataRate(RF24_250KBPS); radio.openWritingPipe(pipes[2]); radio.startListening(); }

void loop(void) { sensors.requestTemperatures(); temp2 = sensors.getTempCByIndex(0); radio.write(&temp2, sizeof(temp2)); delay(10); }

Upload Code to RX (Multiple Nodes) #include #include #include #include #include #include

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Addr, En, Rw, Rs, d4, d5, d6, d7, backlighpin, polarity

float temp1, temp2;

RF24 radio(9, 10); const uint64_t pipes[3] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0E2LL, 0xF0F0F0F0E3LL };

void setup(void) { Serial.begin(9600); radio.begin(); radio.setDataRate(RF24_250KBPS); radio.openReadingPipe(1, pipes[1]); radio.openReadingPipe(2, pipes[2]); radio.startListening(); lcd.begin(16, 2); lcd.backlight(); lcd.clear(); lcd.print("nRF24L01+ Temp"); delay(1000); lcd.clear();

lcd.print("Connecting....."); delay(1000); }

void loop(void) { lcd.clear(); delay(500); if ( radio.available() ) { delay(50); radio.read(&temp1, sizeof(temp1)); lcd.setCursor(0, 0); lcd.print("Temp 1"); lcd.setCursor(9, 0); lcd.print(temp1); lcd.print(" C");

delay(50); radio.read(&temp2, sizeof(temp2)); lcd.setCursor(0, 1); lcd.print("Temp 2");

lcd.setCursor(9, 1); lcd.print(temp2); lcd.print(" C"); } else { lcd.println("No radio available"); } delay(1000); }

DS18B20 nRF24L01+ Temperature wit L-D Displa &e'p 1 ('d &e'p ! on )CD Di$p#(*

 !rduino Wireless Temperature L-D Displa $nRF24L01+ D.T11(  2 D!!m!r 201 admin Arduino UNO, D3&11 , n"#2$L01% ,  &!mp!ratur!

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nRF24L01+ D3&11 &!mp!ratur! and 3umidity S!nsor '2C LCD display 16(2 Arduino UNO $)*+ r!sistor

Li*rar n"#2$L01 Lirary "#2$ Lirary D3&11 Lirary Li-uidCrystal.'2C Lirary /ir! Lirary

Wirin, Wire nRF24L01+ to Arduino UNO GND <–> GND VCC <–> Arduino 3.3V CE <–> Arduino pin 9 CSN <–> Arduino pin 10 SCK <–> Arduino pin 13 MOS <–> Arduino pin 11 MSO <–> Arduino pin 1!

-ode Upload Code to TX #include #include #include #include

int pin = A0; DHT11 dht11(pin); float temperature[2];

double Fahrenheit(double celsius) { return ((double)(9 / 5) * celsius) + 32; }

double Kelvin(double celsius) { return celsius + 273.15; }

RF24 radio(9, 10); const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup(void) { radio.begin(); radio.openWritingPipe(pipe); }

void loop(void) { float temp, humi; dht11.read(humi, temp); temperature[0] = temp;

temperature[1] = humi; radio.write(temperature, sizeof(temperature)); delay(1000); }

Upload Code to RX #include #include #include #include #include #include #include

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Addr, En, Rw, Rs, d4, d5, d6, d7, backlighpin, polarity

float temperature[2];

RF24 radio(9, 10); const uint64_t pipe = 0xE8E8F0F0E1LL;

void setup(void) { Serial.begin(9600); radio.begin(); radio.openReadingPipe(1, pipe); radio.startListening(); lcd.begin(16, 2); lcd.backlight(); lcd.clear(); lcd.print("Humidity & temp"); delay(1000); lcd.clear(); lcd.print("Starting....."); delay(1000); }

void loop(void) { if ( radio.available() ) { bool done = false; while (!done) {

done = radio.read(temperature, sizeof(temperature)); lcd.clear(); delay(500); lcd.setCursor(0, 0); lcd.print("Temp"); lcd.setCursor(0, 1); lcd.print("Humidity"); lcd.setCursor(9, 0); lcd.print(temperature[0]); lcd.print(" C"); lcd.setCursor(9, 1); lcd.print(temperature[1]); lcd.print(" %"); delay(1000); } } else { lcd.setCursor(0, 0); lcd.print("No radio available"); } }