alex9ufo 聰明人求知心切: 2024

2024產專班作業2

1. 系統圖

ESP32+MFRC522 組成RFID Reader 可以將RFID卡片的UID 透過 MQTT協定

上傳(發行主題 (:topic) alex9ufo/2024/RFID/RFID_UID ,, Payload為卡號 )至

Hive MQTT Server上給Node-Red 訂閱 ,

Node-Red 訂閱主題: alex9ufo/2024/RFID/RFID_UID 透過SQlite 節點

將卡號存入資料庫 C:\Users\User\.node-red\2024EX2_1.db 內

並且將卡號發行到Line Notify 提醒用戶有人感應 RFID Reader

LED的控制方式有4種 on 亮 off滅 Timer定時5秒 flash 閃爍

利用 node-red botton 節點送至Hive MQTT Server上給 ESP32 訂閱 ,

發行的主題 Topic為 alex9ufo/2024/RFID/LED_control , Payload為 on 或 off或 timer

或 flash 當esp32 訂閱 (Subscribe ) 主題alex9ufo/2024/RFID/LED_control 然後'依據

payload 收到 on , off , timer ,flash 來控制LED

並且發行主題 Topic為 alex9ufo/2024/RFID/LED_status 回應 Node-Red 確實

已經收到控制LED的命令

Node-Red訂閱 alex9ufo/2024/RFID/LED_status 將LED的狀態存入資料庫 C:\Users\User\.node-red\2024EX2.db 內保存

2. Arduino 程式

1) esp32 preferences 設定

https://github.com/espressif/arduino-esp32/releases/download/2.0.9/package_esp32_index.json

https://hackmd.io/@Robert/Hk1rGMsU3

2) Tools --> Board (依據購買的esp32 型號設定 )

3) comPort 的設定 (上傳 Hex code 到 ESP32板子)

4) Compile (組譯) , upload (上傳)

5) ESP32與 MFRC522 LED的連接

6) Arduino 程式 (記得使用到的 libararies 程式庫要安裝 wifi 的ssid , pass 帳號密碼程式中 alex9ufo 改成自己的英文名 )

const char *SubTopic1 = "alex9ufo/2024/RFID/LED_control";
const char *PubTopic2 = "alex9ufo/2024/RFID/LED_status";
const char *PubTopic3 = "alex9ufo/2024/RFID/RFID_UID";
//const char *PubTopic4 = "alex9ufo/2024/RFID/RFID_PICC";

const char willTopic[] = "alex9ufo/2024/RFID/Starting";
//======================================================

  if (Topic=="alex9ufo/2024/RFID/LED_control") {
  if (message == "on") {

程式

//定義MFRC522 RFID read 與 ESP32 介面 接腳連接Pin assign
/* Wiring RFID RC522 module  
==============================================================
GND     = GND   3.3V    = 3.3V
The following table shows the typical pin layout used:
 *             MFRC522      ESP32     
 *             Reader/PCD             
 * Signal      Pin          Pin         
 * -----------------------------------
 * RST/Reset   RST          GPIO27   
 * SPI SS      SDA(SS)      GPIO5     
 * SPI MOSI    MOSI         GPIO23    
 * SPI MISO    MISO         GPIO19    
 * SPI SCK     SCK          GPIO18    
 *
[1] (1, 2) Configurable, typically defined as RST_PIN in sketch/program.
[2] (1, 2) Configurable, typically defined as SS_PIN in sketch/program.
[3] The SDA pin might be labeled SS on some/older MFRC522 boards
=============================================================
*/
// Wifi 與 MQttClient 程式庫
#include <ArduinoMqttClient.h>
#include <WiFi.h>
//#include "arduino_secrets1.h"

//MFRC522 程式庫
#include <SPI.h>
#include <MFRC522.h>

//GPIO 2 D1 Build in LED

//#define LED 13           //定義LED接腳
int LED = 13;
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
//char ssid[] = "TOTOLINK_A3002MU";    // your network SSID (name)
//char pass[] = "24063173";    // your network password (use for WPA, or use as key for WEP)
// WiFi SSID password , SSID 和密碼進行Wi-Fi 設定 

const char ssid[] = "alex9ufo"; // Enter your Wi-Fi name
const char pass[] = "alex9981";  // Enter Wi-Fi password

//char ssid[] = "dlink-103A";    // your network SSID (name)
//char pass[] = "bdcce12882";    // your network password (use for WPA, or use as key for WEP)

WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);

//const char broker[] = "test.mosquitto.org";
const char broker[] = "broker.mqtt-dashboard.com";
int        port     = 1883;
String json = "";

const char *SubTopic1 = "alex9ufo/2024/RFID/LED_control";
const char *PubTopic2 = "alex9ufo/2024/RFID/LED_status";
const char *PubTopic3 = "alex9ufo/2024/RFID/RFID_UID";
//const char *PubTopic4 = "alex9ufo/2024/RFID/RFID_PICC";

const char willTopic[] = "alex9ufo/2024/RFID/Starting";
//======================================================
#define RST_PIN      27        // 讀卡機的重置腳位
#define SS_PIN       5        // 晶片選擇腳位
MFRC522 mfrc522(SS_PIN, RST_PIN);    // 建立MFRC522物件
MFRC522::MIFARE_Key key;  // 儲存金鑰
MFRC522::StatusCode status;
//===========================================================
//布林代數 LED狀態 是否連上網路ESP32 ready ?
bool ledState = false;
bool atwork = false;
bool Send = false;  //true
String LEDjson = "";
int Count= 0;
bool Flash = false;  //true
bool Timer = false;  //true

//===========================================================
void onMqttMessage(int messageSize) {
  // we received a message, print out the topic and contents
  Serial.print("Received a message with topic '");
  Serial.print(mqttClient.messageTopic());
  String Topic= mqttClient.messageTopic();
  Serial.print("', duplicate = ");
  Serial.print(mqttClient.messageDup() ? "true" : "false");
  Serial.print(", QoS = ");
  Serial.print(mqttClient.messageQoS());
  Serial.print(", retained = ");
  Serial.print(mqttClient.messageRetain() ? "true" : "false");
  Serial.print("', length ");
  Serial.print(messageSize);
  Serial.println(" bytes:");
  String message="";
  // use the Stream interface to print the contents
  while (mqttClient.available()) {
    //Serial.print((char)mqttClient.read());
    message += (char)mqttClient.read();
  }

  Serial.println(message);
  message.trim();
  Topic.trim();

  if (Topic=="alex9ufo/2024/RFID/LED_control") {
  if (message == "on") {
    digitalWrite(LED, LOW);  // Turn on the LED
    //ledState = true;  //ledState = ture HIGH
    //設定 各個 旗號
    LEDjson ="ON";
    Send = true ;
    Serial.print("LED =");
    Serial.println(LEDjson);
  }

  if (message == "off" ) {
    digitalWrite(LED, HIGH); // Turn off the LED
    //ledState = false; //ledState = false LOW
    LEDjson ="OFF";
    Send = true ;
    Serial.print("LED =");
    Serial.println(LEDjson);
  }
  
  if (message == "flash" ) {
    digitalWrite(LED, HIGH); // Turn off the LED
    Flash = true;
    Timer = false;
    LEDjson ="FLASH";
    Send = true ;  
    Serial.print("LED =");
    Serial.println(LEDjson);      
  }

  if (message == "timer" ) {
    digitalWrite(LED, LOW); // Turn off the LED
    Flash = false;
    Timer = true;
    LEDjson ="TIMER";
    Send = true ;
    Count= 11;
    Serial.print("LED =");
    Serial.println(LEDjson);   
  }
  
    Serial.println();
    Serial.println("-----------------------");
  }  

}

//===========================================================
String printHex(byte *buffer, byte bufferSize) {
      String id = "";
      for (byte i = 0; i < bufferSize; i++) {
        id += buffer[i] < 0x10 ? "0" : "";
        id += String(buffer[i], HEX);
        id +=" ";
      }
      return id;
}
//===========================================================
//副程式  setup wifi
void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);     //print ssid
  WiFi.begin(ssid, pass);  //初始化WiFi 函式庫並回傳目前的網路狀態
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }   //假設 wifi 未連接 show ………

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}  
//===========================================================
//判斷 旗號Flash , Timer 是否為真
void LED_Message() {
  //判斷 旗號 Flash / timer  是否為真 ? 閃爍 定時
  
  if (Flash){
    digitalWrite(LED, !digitalRead(LED));
    delay(500);
    if (digitalRead(LED))
      ledState = true;
    else
      ledState = false;

  } //(Flash)

  if (Timer) {
    digitalWrite(LED, LOW);
    delay(500);
    if (digitalRead(LED))
      ledState = true;
    else
      ledState = false;

  Count=Count-1;
  if (Count == 0 ){
    Timer=false;
    digitalWrite(LED, HIGH);
    ledState = false;
    }
  } //(Timer)
  
  
  ////判斷 旗號 Send 是否為真 回傳MQTT訊息到MQTT Broker　
  if (Send) {
    // Convert JSON string to character array
    Serial.print("Publish message: ");
    Serial.println(LEDjson);
    LEDjson.trim();

    bool retained = false;
    int qos = 1;
    bool dup = false;
    
    // Publish JSON character array to MQTT topic
    mqttClient.beginMessage(PubTopic2,  LEDjson.length(), retained, qos, dup);  //LED Status
    mqttClient.print(LEDjson);
    mqttClient.endMessage();
    Send = false;    //處理過後 旗號 Send為假
  }

} 
//=========================================================== 
void setup() {
  pinMode(LED, OUTPUT);
  digitalWrite(LED, HIGH);  // Turn off the LED initially
  //Initialize serial and wait for port to open: 
  Serial.begin(115200);   // Initialize serial communications with the PC
  while (!Serial);    // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
  
  setup_wifi();
  Serial.println("You're connected to the network");
  Serial.println();
  
  String willPayload = "ESP32 Start working....!";
  bool willRetain = true;
  int willQos = 1;

  mqttClient.beginWill(willTopic, willPayload.length(), willRetain, willQos);
  mqttClient.print(willPayload);
  mqttClient.endWill();

  Serial.print("Attempting to connect to the MQTT broker: ");
  Serial.println(broker);

  if (!mqttClient.connect(broker, port)) {
    Serial.print("MQTT connection failed! Error code = ");
    Serial.println(mqttClient.connectError());

    while (1);
  }

  Serial.println("You're connected to the MQTT broker!");
  Serial.println();

  // set the message receive callback
  mqttClient.onMessage(onMqttMessage);
  Serial.print("Subscribing to topic: ");
  Serial.println(SubTopic1);
  // subscribe to a topic
  // the second parameter sets the QoS of the subscription,
  // the the library supports subscribing at QoS 0, 1, or 2
  int subscribeQos = 1;
  mqttClient.subscribe(SubTopic1, subscribeQos);


  Serial.println();
  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522
  delay(4);       // Optional delay. Some board do need more time after init to be ready, see Readme
  //mfrc522.PCD_DumpVersionToSerial();  // Show details of PCD - MFRC522 Card Reader details
  Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
}
//===========================================================
void loop() {
  
  // call poll() regularly to allow the library to receive MQTT messages and
  // send MQTT keep alives which avoids being disconnected by the broker
  mqttClient.poll();
  
  LED_Message();
  // to avoid having delays in loop, we'll use the strategy from BlinkWithoutDelay
  // see: File -> Examples -> 02.Digital -> BlinkWithoutDelay for more info
  unsigned long currentMillis = millis();


 if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) {
    
     Serial.println(F("Please scan MIFARE Classic card..."));
    // 確認是否有新卡片
    
    byte *id = mfrc522.uid.uidByte;   // 取得卡片的UID
    byte idSize = mfrc522.uid.size;   // 取得UID的長度
    String Type;
    Serial.print("PICC type: ");      // 顯示卡片類型
    // 根據卡片回應的SAK值（mfrc522.uid.sak）判斷卡片類型
    MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
    Type= mfrc522.PICC_GetTypeName(piccType);
    Serial.println(mfrc522.PICC_GetTypeName(piccType));

    Serial.print("UID Size: ");       // 顯示卡片的UID長度值
    Serial.println(idSize);
 
    for (byte i = 0; i < idSize; i++) {  // 逐一顯示UID碼
      Serial.print("id[");
      Serial.print(i);
      Serial.print("]: ");
      Serial.println(id[i], HEX);       // 以16進位顯示UID值
    }
    Serial.println();



    json="";
    String json1=printHex(mfrc522.uid.uidByte, mfrc522.uid.size);
    json1.toUpperCase();
    json = json + json1;
    json.trim();

    bool retained = false;
    int qos = 1;
    bool dup = false;

    mqttClient.beginMessage(PubTopic3,  json.length(), retained, qos, dup);
    mqttClient.print(json);
    mqttClient.endMessage();
    
    /*
    json="";
    json = "PICC type: ";
    json =  json + Type;
    json.trim();
    
    retained = false;
    qos = 1;
    dup = false;

    mqttClient.beginMessage(PubTopic4,  json.length(), retained, qos, dup);
    mqttClient.print(json);
    mqttClient.endMessage();
    */


    Serial.println();
    // Dump debug info about the card; PICC_HaltA() is automatically called
    // 令卡片進入停止狀態
    // Dump debug info about the card; PICC_HaltA() is automatically called
    // mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
    
    mfrc522.PICC_HaltA();
    mfrc522.PCD_StopCrypto1(); // stop encryption on PCD
  }
}
////===========================================================