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In questo video scoprirai come usare dei moduli wireless nRF24L01+ con Arduino.
Tramite degli esempi imparerai come inviare i messaggi e come effettuare la comunicazione bidirezionale senza fili tra due o più schede Arduino.
#include <SPI.h>#include <nRF24L01.h>#include <RF24.h> RF24 wireless(10, 9);const byte address[6] = "00001";const char msg[] = "Tutorial di Arduino"; void setup() { Serial.begin(9600); wireless.begin(); wireless.setChannel(125); wireless.openWritingPipe(address); wireless.setPALevel(RF24_PA_LOW); wireless.stopListening();} void loop() { bool result = wireless.write(&msg, sizeof(msg)); if (result) { Serial.println("Comunicazione inviata correttamente"); } else { Serial.println("Errore: messaggio non ricevuto"); } delay(1000);}#include <SPI.h>#include <nRF24L01.h>#include <RF24.h> RF24 wireless(48, 49);const byte address[6] = "00001"; void setup() { Serial.begin(9600); wireless.begin(); wireless.setChannel(125); wireless.openReadingPipe(1, address); wireless.setPALevel(RF24_PA_LOW); wireless.startListening();} void loop() { char msg[32] = {0}; if (wireless.available()) { wireless.read(&msg, sizeof(msg)); Serial.println(msg); } delay(10);}
#include <SPI.h>#include <nRF24L01.h>#include <RF24.h> #define POTENTIOMETER_PIN A0#define LED_PIN 3 RF24 wireless(10, 9);const byte addresses [][6] = {"node1", "node2"};int ledCount = 0;bool isDark = false; void setup() { pinMode(LED_PIN, OUTPUT); wireless.begin(); wireless.setChannel(125); wireless.openWritingPipe(addresses[0]); wireless.openReadingPipe(1, addresses[1]); wireless.setPALevel(RF24_PA_MIN); wireless.startListening();} void loop() { int value = analogRead(POTENTIOMETER_PIN) / 171; if (value != ledCount) { ledCount = value; wireless.stopListening(); wireless.write(&ledCount, sizeof(ledCount)); delay(100); wireless.startListening(); } if (wireless.available()) { wireless.read(&isDark, sizeof(isDark)); digitalWrite(LED_PIN, isDark); } delay(10);}#include <SPI.h>#include <nRF24L01.h>#include <RF24.h> #define PHOTORESISTOR_PIN A0#define THRESHOLD 550 RF24 wireless(48, 49);const byte addresses [][6] = {"node1", "node2"};int ledPins[] = {6, 5, 4, 3, 2};int ledCount = 0;bool isDark = false; void setup() { for (int i = 0; i < 5; i++) { pinMode(ledPins[i], OUTPUT); } wireless.begin(); wireless.setChannel(125); wireless.openWritingPipe(addresses[1]); wireless.openReadingPipe(1, addresses[0]); wireless.setPALevel(RF24_PA_MIN); wireless.startListening();} void loop() { bool value = analogRead(PHOTORESISTOR_PIN) < THRESHOLD; if (value != isDark) { isDark = value; wireless.stopListening(); wireless.write(&isDark, sizeof(isDark)); delay(100); wireless.startListening(); } if (wireless.available()) { wireless.read(&ledCount, sizeof(ledCount)); for (int i = 0; i < 5; i++) { digitalWrite(ledPins[i], i < ledCount); } } delay(10); }In qualità di Affiliato Amazon riceviamo un guadagno dagli acquisti idonei
