Arduino WIFI 注意事項

Arduino WIFI 注意事項

ESP8266 WiFi 是Arduino常用的WIFI模組，該模組有兩種運行模式（AP模式和STA模式）

AP模式（相當於區域網路連結，手機本地控制）：
把ESP8266 WiFi 熱點，也就是預先設定ESP8266 AP熱點名稱與密碼，這樣手機搜尋WIFI找到設定的名稱與密碼就可以連線使用。

執行手機APK程式就可以用WIFI方式與Arduino ESP8266溝通。


STA模式（相當於Internet網路連結，用於外部網路讓手機、網頁控制）：

網路資源





另一塊WIFI模組 ：nRF24L01 （電壓不可超過3.6V）
nFR24L01 2.4G無線模組只能單向雙工，一個模組只能單純發送或接收，不能改變，所以我們使用兩塊Arduino開發板來分別收發


網路資源  網路資源02  網路資源03  網路資源04


使用器材
arduino UNR R3*2
NRF2401 *2

使用庫
RF24
RF24Network


//////////////////////////////////////主機-發送信號/////////////////////////////////////
#include
#include
#include

// nRF24L01(+) radio attached using Getting Started board 
RF24 radio(9,10);
// Network uses that radio
RF24Network network(radio);
// Address of our node
const uint16_t this_node = 1;
// Address of the other node
const uint16_t other_node = 0;
// How often to send 'hello world to the other unit
const unsigned long interval = 150; //ms
// When did we last send?
unsigned long last_sent;
// How many have we sent already
//unsigned long packets_sent;

// Structure of our payload
struct payload_t
{
  uint32_t ms;
  uint32_t sensorDataA;
  uint32_t sensorDataB;
};

boolean power_SW;
int led_VOL;

void setup(void)
{
  Serial.begin(115200);
  Serial.println("RF24Network/examples/helloworld_tx/");

  SPI.begin();
  radio.begin();
  radio.setDataRate( RF24_250KBPS ) ;
  network.begin(/*channel*/ 50, /*node address*/ this_node);
  randomSeed(analogRead(0));
  pinMode(7,INPUT_PULLUP); 
}

void loop(void)
{
  power_SW=!digitalRead(7);
  led_VOL=analogRead(A0)/4;

  // Pump the network regularly
  network.update();
  // If it's time to send a message, send it!
  unsigned long now = millis();
  if ( now - last_sent >= interval  )
  {
    last_sent = now;

    Serial.print("power_SW:");
    Serial.println(power_SW);
    Serial.print("led_VOL:");
    Serial.println(led_VOL);

    Serial.print("Sending...");
    payload_t payload = { 
      millis(),power_SW,led_VOL    };
    RF24NetworkHeader header(/*to node*/ other_node);
    bool ok = network.write(header,&payload,sizeof(payload));
    if (ok)
      Serial.println("ok.");
    else
      Serial.println("failed.");
  }
}


//////////////////////////////////////從機-接收信號/////////////////////////////////////


#include
#include
#include

// nRF24L01(+) radio attached using Getting Started board 
RF24 radio(9,10);
// Network uses that radio
RF24Network network(radio);
// Address of our node
const uint16_t this_node = 0; 
// Address of the other node
const uint16_t other_node = 1;

// Structure of our payload
struct payload_t
{
  uint32_t ms;
  uint32_t sensorDataA;
  uint32_t sensorDataB;
};

#define power_PIN 5
#define led_PIN 6

boolean power_SW;
int led_VOL;


void setup(void)
{
  Serial.begin(115200);

  SPI.begin();
  radio.begin();
  radio.setDataRate( RF24_250KBPS ) ;
  network.begin(/*channel*/ 50, /*node address*/ this_node);

  pinMode(power_PIN,OUTPUT);
  pinMode(led_PIN,OUTPUT);
}

void loop(void)
{  
  // Pump the network regularly
  network.update();
  // Is there anything ready for us?
  while ( network.available() )
  {
    // If so, grab it and print it out
    RF24NetworkHeader header;
    payload_t payload;
    network.read(header,&payload,sizeof(payload));
    power_SW=payload.sensorDataA;
    led_VOL=payload.sensorDataB;

    Serial.print("power_SW:");
    Serial.println(power_SW);
    Serial.print("led_VOL:");
    Serial.println(led_VOL);
  }

  digitalWrite(power_PIN,power_SW);
  analogWrite(led_PIN,led_VOL);

}