alex9ufo 聰明人求知心切: ESP32 MFRC522 Write / Read 讀取與寫入資料 Sector / Block + Node-Red UI控制Sector / Block 讀寫

ESP32 MFRC522 Write / Read 讀取與寫入資料 Sector / Block + Node-Red UI控制Sector / Block 讀寫

每個區段的區塊3也叫做控制區塊（Sector Trailer, Trailer Block或Security Block），如果把上圖的資料結構想像成16層大樓，控制區塊相當於每一層樓的密碼鎖；進、出該層樓必須先輸入正確的密碼，而且每層樓都有兩組密碼。

控制區塊包含金鑰A和金鑰B兩組密碼（各6位元組），以及存取控制位元（4位元組，但僅使用前3位元組）

RFID卡內部有1KB的EEPROM記憶體，為了妥善管理並達到一卡多用的功能，這個記憶體空間被劃分成16個區段（sector），每個區段有4個區塊（block），區段0的區塊0包含卡片的唯一識別碼（UID，也稱為「製造商識別碼」，Manufacturer Code）。

參考 https://swf.com.tw/?p=941

/*
MFRC522物件.PCD_Authenticate()：驗證金鑰，相當於比對輸入密碼和卡片裡的密碼，唯通過驗證才能存取區段資料。
MFRC522物件.GetStatusCodeName()：取得狀態碼的名稱
MFRC522物件.MIFARE_Read()：讀取指定區塊的內容
MFRC522物件.MIFARE_Write()：在指定區塊寫入資料
MFRC522物件.PICC_DumpMifareClassicSectorToSerial()：在序列埠監控視窗顯示指定的區段內容
*/

//wifi &  MQTT
#include <WiFi.h>             //定義Wifi 程式庫
#include <PubSubClient.h>      //定義MQTT Pub發行 Sub 訂閱 程式庫
//RC522 SPI Mode
#include <SPI.h>          //定義MFRC522 RFID read 與 ESP32 介面
#include <MFRC522.h>      //定義MFRC522 RFID read程式庫

#define RST_PIN    27     // Reset腳
#define SS_PIN     5     // 晶片選擇腳

//GPIO 2 D1 Build in LED
#define LED 2                //定義LED接腳
//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 SSID password , SSID 和密碼進行Wi-Fi 設定 
//const char *ssid = "TOTOLINK_A3002MU"; // Enter your Wi-Fi name
//const char *password = "24063173";  // Enter Wi-Fi password
const char *ssid = "dlink-103A"; // Enter your Wi-Fi name
const char *password = "bdcce12882";  // Enter Wi-Fi password


// MQTT Broker
const char *mqtt_broker = "broker.hivemq.com"; //broker.mqtt-dashboard.com
const char *topic1 = "alex9ufo/RFID/read";
const char *topic2 = "alex9ufo/RFID/write";
const char *topic3 = "alex9ufo/RFID/back";

const char *mqtt_username = "alex9ufo";
const char *mqtt_password = "public";
const int mqtt_port = 1883;

WiFiClient espClient;
PubSubClient client(espClient);
//定義 MQTT 發行及訂閱需要的變數
String json = "";
char jsonChar[50];  //client.publish
bool toggle=false;
bool WR_flag=false;
bool RD_flag=false;

String text="";

MFRC522 mfrc522(SS_PIN, RST_PIN);    // 建立MFRC522物件
MFRC522::MIFARE_Key key;  // 儲存金鑰

byte sector = 0;   // 指定讀寫的「區段」，可能值:0~15
byte block = 0;     // 指定讀寫的「區塊」，可能值:0~3
byte blockData[16] = "Keep Hacking!";   // 最多可存入16個字元
// 若要清除區塊內容，請寫入16個 0
//byte blockData[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

// 暫存讀取區塊內容的陣列，MIFARE_Read()方法要求至少要18位元組空間，來存放16位元組。
byte buffer[18];

MFRC522::StatusCode status;
//====================================================   
/*** 位元組陣列轉儲為串列的十六進位值
 * 這個副程式把讀取到的UID，用16進位顯示出來
*/
void dump_byte_array(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], HEX);
  }
}
//===========================================================
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;
    }
//===========================================================
void writeBlock(byte _sector, byte _block, byte _blockData[]) {
  if (_sector < 0 || _sector > 15 || _block < 0 || _block > 3) {
    // 顯示「區段或區塊碼錯誤」，然後結束函式。
    Serial.println(F("Wrong sector or block number."));
    return;
  }

  if (_sector == 0 && _block == 0) {
    // 顯示「第一個區塊只能讀取」，然後結束函式。
    Serial.println(F("First block is read-only."));
    return;
  }

  byte blockNum = _sector * 4 + _block;  // 計算區塊的實際編號（0~63）
  byte trailerBlock = _sector * 4 + 3;   // 控制區塊編號

  // 驗證金鑰
  status = (MFRC522::StatusCode) mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, trailerBlock, &key, &(mfrc522.uid));
  // 若未通過驗證…
  if (status != MFRC522::STATUS_OK) {
    // 顯示錯誤訊息
    Serial.print(F("PCD_Authenticate() failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // 在指定區塊寫入16位元組資料
  status = (MFRC522::StatusCode) mfrc522.MIFARE_Write(blockNum, _blockData, 16);
  // 若寫入不成功…
  if (status != MFRC522::STATUS_OK) {
    // 顯示錯誤訊息
    Serial.print(F("MIFARE_Write() failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // 顯示「寫入成功！」
  Serial.println(F("Data was written."));
  client.publish(topic3,"Data was written.");
}
//===========================================================
void readBlock(byte _sector, byte _block, byte _blockData[])  {
  if (_sector < 0 || _sector > 15 || _block < 0 || _block > 3) {
    // 顯示「區段或區塊碼錯誤」，然後結束函式。
    Serial.println(F("Wrong sector or block number."));
    return;
  }

  byte blockNum = _sector * 4 + _block;  // 計算區塊的實際編號（0~63）
  byte trailerBlock = _sector * 4 + 3;   // 控制區塊編號

  // 驗證金鑰
  status = (MFRC522::StatusCode) mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, trailerBlock, &key, &(mfrc522.uid));
  // 若未通過驗證…
  if (status != MFRC522::STATUS_OK) {
    // 顯示錯誤訊息
    Serial.print(F("PCD_Authenticate() failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  byte buffersize = 18;
  status = (MFRC522::StatusCode) mfrc522.MIFARE_Read(blockNum, _blockData, &buffersize);

  // 若讀取不成功…
  if (status != MFRC522::STATUS_OK) {
    // 顯示錯誤訊息
    Serial.print(F("MIFARE_read() failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  // 顯示「讀取成功！」
  Serial.println(F("Data was read."));
  client.publish(topic3,"Data was read.");
}

//===========================================================
//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, password);  //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());
}    

//===========================================================
// 接收MQTT主題後呼叫運行程式
//===========================================================
void callback(char *topic, byte *payload, unsigned int length) {
    Serial.print("Message arrived in topic: ");
    Serial.println(topic);
    String topic1=topic;
    Serial.print("Message: ");
    String message;
   //將接收資料轉成字串以利後續判斷
    for (int i = 0; i < length; i++) {
        message += (char) payload[i];  // Convert *byte to string
    }
    Serial.println(message); 
    String  sec1;
    String  blk1;
    String  text1;
    toggle = false;

    sec1=message.substring(0,2);
    blk1=message.substring(3,5);
    text=message.substring(6);
    sector = sec1.toInt();
    block  = blk1.toInt();


    if (topic1.substring(14,18) == "read") {
      String  sec1=message.substring(0,2);
      String  blk1=message.substring(3,5);
      //String  text1=message.subString(6);
      sector = sec1.toInt();
      block  = blk1.toInt();  
      Serial.print(sec1); 
      Serial.print(blk1); 

      toggle=true;
      RD_flag=true;
    }
    if (topic1.substring(14,19) == "write") {
      String  sec1=message.substring(0,2);
      String  blk1=message.substring(3,5);
      text=message.substring(6);
      text.getBytes(blockData,text.length()+1);

      Serial.print(sec1); 
      Serial.print(blk1); 
      Serial.println(text);  
      sector = sec1.toInt();
      block  = blk1.toInt();
      toggle=true;
      WR_flag=true;
    }
    Serial.println();
    Serial.println("-------callback-----------");

}

//===========================================================
//  若目前沒有和伺服器相連，則反覆執行直到連結成功
void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("esp32-client-")) {
      Serial.println("connected");
      // Subscribe
      client.subscribe("alex9ufo/RFID/read");
      client.subscribe("alex9ufo/RFID/write");      
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
      if (WiFi.status() != WL_CONNECTED)  {
        Serial.println("Reconnecting to WiFi...");
        WiFi.disconnect();
        WiFi.reconnect();
      }
    }
  }
}

//===========================================================
void setup() {
  Serial.begin(115200);
  SPI.begin();               // 初始化SPI介面
  mfrc522.PCD_Init();        // 初始化MFRC522卡片
  //======================================================
  // Connecting to a WiFi network
  setup_wifi();
  // Setting LED pin as output
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);  // Turn off the LED initially
  Serial.println(F("Please scan MIFARE Classic card..."));

  // 準備金鑰（用於key A和key B），出廠預設為6組 0xFF。
  for (byte i = 0; i < 6; i++) {
    key.keyByte[i] = 0xFF;
  }
  Serial.println(F("掃描卡片開始進行讀或者寫"));
  Serial.print(F("使用A和B作為KEY"));
 
  dump_byte_array(key.keyByte, MFRC522::MF_KEY_SIZE);
 
  Serial.println();
  Serial.println(F("注意，會把資料寫入到卡片 在 sector # "));
    
  Serial.println(F("Ready!"));
  Serial.println(F("==================================================="));
  Serial.println("Tap an RFID/NFC tag on the RFID-RC522 reader");
  // Connecting to an MQTT broker
  client.setServer(mqtt_broker, mqtt_port);
  client.setCallback(callback);

  while (!client.connected()) {
        String client_id = "esp32-client-";
        client_id += String(WiFi.macAddress());
        Serial.printf("The client %s connects to the public MQTT broker\n", client_id.c_str());
        if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
            Serial.println("Public HiveMQ MQTT broker (broker.mqtt-dashboard.com) connected");
        } else {
            Serial.print("Failed with state ");
            Serial.print(client.state());
            delay(2000);
        }
  }

  // MQTT　Publish and subscribe
  client.subscribe(topic1);
  client.subscribe(topic2);
}
//===========================================================
void loop() {

  // 查看是否感應到卡片
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return;  // 退回loop迴圈的開頭
  }

  // 選取一張卡片
  if ( ! mfrc522.PICC_ReadCardSerial()) {  // 若傳回1，代表已讀取到卡片的ID
    return;
  }

  if ((sector>0) ||(block>0)) {
    if (WR_flag==true){
      writeBlock(sector, block, blockData);  // 區段編號、區塊編號、包含寫入資料的陣列
      readBlock(sector, block, buffer);      // 區段編號、區塊編號、存放讀取資料的陣列 
      Serial.print("sector=");
      Serial.print(sector,DEC);
      Serial.print(", block=");
      Serial.println(block,DEC);

      Serial.print(F("Read block: "));        // 顯示儲存讀取資料的陣列元素值
      for (byte i = 0 ; i < 16 ; i++) {
        Serial.write (buffer[i]);
      }
      Serial.println();
      //========publish topic3 =========
      String json ="Read data : ";
      String str=String((char *)buffer);
      json =json + str;
      json.trim();
      //json.toCharArray(jsonChar, json.length()+1);
      json.toCharArray(jsonChar,28+1);
      client.publish(topic3,jsonChar);

      WR_flag==false; 
    }
    
    
    if (RD_flag==true){
      readBlock(sector, block, buffer);      // 區段編號、區塊編號、存放讀取資料的陣列
      Serial.print("sector=");
      Serial.print(sector,DEC);
      Serial.print(", block=");
      Serial.println(block,DEC);

      Serial.print(F("Read block: "));        // 顯示儲存讀取資料的陣列元素值
      for (byte i = 0 ; i <18 ; i++) {
        Serial.write (buffer[i]);
      }
      Serial.println(); 
      //========publish topic3 =========
      String json ="Read data : ";
      String str=String((char *)buffer);
      json =json + str;
      json.trim();
      //json.toCharArray(jsonChar, json.length()+1);
      json.toCharArray(jsonChar,28+1);
      client.publish(topic3,jsonChar);

      RD_flag==false; 
    }

  }
  else
  {
    Serial.print(F("Card UID:"));
    dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size); // 顯示卡片的UID
    Serial.println();
    Serial.print(F("PICC type: "));
    MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
    Serial.println(mfrc522.PICC_GetTypeName(piccType));  //顯示卡片的類型  
    
    String json =("Card UID: ");
    json = json + printHex(mfrc522.uid.uidByte, mfrc522.uid.size);
    json.trim();
    json = json +(" , PICC type: ");
    json = json + String(mfrc522.PICC_GetTypeName(piccType));
    json.trim();
    ///json.toUpperCase();
    // Convert JSON string to character array
    json.toCharArray(jsonChar, json.length()+1);
    client.publish(topic3,jsonChar);

    // Dump debug info about the card; PICC_HaltA() is automatically called
    mfrc522.PICC_DumpToSerial(&(mfrc522.uid));

  }

 

  // 令卡片進入停止狀態
  mfrc522.PICC_HaltA();
  mfrc522.PCD_StopCrypto1(); // stop encryption on PCD
  Serial.println("RFID Halt");


 if (!client.connected()) { //假設未連接的處理程序
      reconnect();
      Serial.print(" client not connected  reconnect ");
      delay(200);
    } 
  client.loop();

// if WiFi is down, try reconnecting
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print(millis());
    Serial.println("Reconnecting to WiFi...");
    WiFi.disconnect();
    WiFi.reconnect();
    client.setCallback(callback);

  }

}

load:0x3fff0030,len:1416

load:0x40078000,len:14804

load:0x40080400,len:4

load:0x40080404,len:3356

entry 0x4008059c

Connecting to dlink-103A

WiFi connected

IP address:

192.168.0.100

Please scan MIFARE Classic card...

掃描卡片開始進行讀或者寫

使用A和B作為KEY FF FF FF FF FF FF

注意，會把資料寫入到卡片在 sector #

Ready!

===================================================

Tap an RFID/NFC tag on the RFID-RC522 reader

The client esp32-client-24:6F:28:A9:83:F4 connects to the public MQTT broker

Public HiveMQ MQTT broker (broker.mqtt-dashboard.com) connected

Card UID: 86 D5 EA 6A

PICC type: MIFARE 1KB

Card UID: 86 D5 EA 6A

Card SAK: 08

PICC type: MIFARE 1KB

Sector Block 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 AccessBits

15 63 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

62 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 35 [ 0 0 0 ]

61 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 31 [ 0 0 0 ]

60 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 35 [ 0 0 0 ]

RFID Halt

Message arrived in topic: alex9ufo/RFID/read

Message: 05,01

0501

-------callback-----------

Data was read.

sector=5, block=1

Read block: alex9ufo testing:

RFID Halt

Data was read.

sector=5, block=1

Read block: alex9ufo testing:

RFID Halt

Card UID: 86 D5 EA 6A

PICC type: MIFARE 1KB

Card UID: 86 D5 EA 6A

Card SAK: 08

PICC type: MIFARE 1KB

Sector Block 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 AccessBits

15 63 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

62 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 35 [ 0 0 0 ]

61 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 31 [ 0 0 0 ]

60 61 6C 65 78 39 75 66 6F 74 65 73 74 69 6E 67 35 [ 0 0 0 ]

14 59 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

58 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

57 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

56 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

13 55 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

54 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

53 4B 65 65 70 20 48 61 63 6B 69 6E 67 21 00 00 00 [ 0 0 0 ]

52 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

12 51 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

49 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

48 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

11 47 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

46 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

45 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

44 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

10 43 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

42 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

41 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

9 39 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

38 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

37 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

36 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

8 35 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

34 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

33 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

32 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

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29 74 65 73 74 00 48 61 63 6B 69 6E 67 21 00 00 00 [ 0 0 0 ]

28 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

6 27 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

26 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

25 61 6C 65 78 39 75 66 6F 20 74 65 73 74 69 6E 67 [ 0 0 0 ]

24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

5 23 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

22 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

21 61 6C 65 78 39 75 66 6F 20 74 65 73 74 69 6E 67 [ 0 0 0 ]

20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

4 19 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

3 15 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

14 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

13 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 0 0 0 ]

2 11 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

10 2B 39 32 33 30 30 34 34 34 37 37 37 37 20 20 20 [ 0 0 0 ]

9 32 38 2D 30 39 2D 31 39 38 39 20 20 20 20 20 20 [ 0 0 0 ]

8 4A 68 6F 6E 20 41 62 72 61 68 75 6D 20 20 20 20 [ 0 0 0 ]

1 7 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

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5 20 20 20 20 20 20 20 20 20 20 20 20 20 20 00 00 [ 0 0 0 ]

4 01 02 03 04 05 06 07 08 00 00 00 00 00 00 00 00 [ 0 0 0 ]

0 3 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF [ 0 0 1 ]

2 61 6C 65 78 39 75 66 6F 20 74 65 73 74 69 6E 67 [ 0 0 0 ]

1 61 6C 65 78 20 20 20 20 20 20 20 20 20 20 20 20 [ 0 0 0 ]

0 86 D5 EA 6A D3 08 04 00 62 63 64 65 66 67 68 69 [ 0 0 0 ]

NODE-RED程式

alex9ufo 聰明人求知心切

2024年1月18日星期四

ESP32 MFRC522 Write / Read 讀取與寫入資料 Sector / Block + Node-Red UI控制Sector / Block 讀寫

沒有留言:

張貼留言

2024_09 作業3 以Node-Red 為主

2024年1月18日 星期四

ESP32 MFRC522 Write / Read 讀取與寫入資料 Sector / Block + Node-Red UI控制Sector / Block 讀寫

沒有留言:

張貼留言

2024_09 作業3 以Node-Red 為主

2024年1月18日星期四