491-3-2(B보드).txt

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <espnow.h>

byte board[] = {0xE8,0x68,0xE7,0xCB,0x65,0xBD};

unsigned long t = 0;

struct Nockanda{
  int num1;
  int num2;
  float num3;
  float num4;
};

Nockanda mydata;

const char* ssid = "nockanda";
const char* password = "11213144";
const char* mqtt_server = "broker.mqtt-dashboard.com";

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE  (50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == '1') {
    digitalWrite(BUILTIN_LED, LOW);   // Turn the LED on (Note that LOW is the voltage level
    // but actually the LED is on; this is because
    // it is active low on the ESP-01)
  } else {
    digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
  }

}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      //client.publish("outTopic", "hello world");
      // ... and resubscribe
      //client.subscribe("inTopic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  WiFi.mode(WIFI_STA); //제일 처음 할일! 와이파이모드를 스테이션 모드로!

  //ESPNOW의 기능을 활성화한다!
  if (esp_now_init() != 0) {
    //ESP NOW 시작 실패!
    Serial.println("ESPNOW 실패!");
    return;
  }else{
     //ESP NOW 시작 성공!
     Serial.println("ESPNOW 성공!");
  }

  //지금 이보드의 역할은 주고 받는것을 다하겠다!
  esp_now_set_self_role(ESP_NOW_ROLE_COMBO);

  //나의 슬레이브를 등록해야겠다!
  esp_now_add_peer(board, ESP_NOW_ROLE_COMBO, 1, NULL, 0);//뒤에 2개는 ID, PW

  //송신완료 콜백함수 등록
  esp_now_register_send_cb(OnDataSent);

  //수신완료 콜백 함수 등록
  esp_now_register_recv_cb(OnDataRecv);
}

void loop() {

  if (!client.connected()) {
    reconnect();
  }
  client.loop();
/*
  unsigned long now = millis();
  if (now - lastMsg > 2000) {
    lastMsg = now;
    ++value;
    snprintf (msg, MSG_BUFFER_SIZE, "hello world #%ld", value);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("outTopic", msg);
  }
  */
}

//송신콜백함수 원형:
void OnDataSent(uint8_t *mac, uint8_t status) {
   //status가 0일때 송신 완료!
   if(status == 0){
      Serial.println("성공적으로 송신했음!");
   }else{
      Serial.println("송신 실패!!");
   }
}


//수신콜백함수 원형:
void OnDataRecv(uint8_t * mac, uint8_t * data, uint8_t len) {
  memcpy(&mydata,data,sizeof(mydata));
  Serial.println(mydata.num1);
  Serial.println(mydata.num2);
  Serial.println(mydata.num3);
  Serial.println(mydata.num4);
  String myjson ="{\"num1\":"+String(mydata.num1)+",\"num2\":"+String(mydata.num2)+",\"num3\":"+String(mydata.num3)+",\"num4\":"+String(mydata.num4)+"}";
  client.publish("nockanda/espnow", myjson.c_str());
}