產業專班 作業2 (使用 WOKWI 模擬 RFID UID )
(執行時 需先按
建立LED資料庫 建立RFID資料庫)
WOKWI 程式
#include <ArduinoMqttClient.h>
#include <WiFi.h>
//MFRC522 程式庫 模擬mfrc522 定期送出卡號
//#include <SPI.h>
//#include <MFRC522.h>
//#define LED 13 //定義LED接腳
int LED = 13;
char ssid[]="Wokwi-GUEST";
char pass[]="";
WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);
//const char broker[] = "test.mosquitto.org";
const char broker[] = "broker.mqtt-dashboard.com";
int port = 1883;
String json = "";
int id[10]={0,0,0,0,0,0,0,0,0,0};
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 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
unsigned long previousMillis = 0;
unsigned long interval = 30000;
//===========================================================
String decimalToHex(int decimal) {
// Create an empty string to store the hexadecimal value.
String hex = "";
// Loop through each digit of the hexadecimal value.
while (decimal > 0) {
// Get the remainder when dividing the decimal value by 16.
int remainder = decimal % 16;
// Convert the remainder to its hexadecimal representation.
char hexDigit;
if (remainder < 10) {
hexDigit = '0' + remainder;
} else {
hexDigit = 'A' + remainder - 10;
}
// Add the hexadecimal digit to the front of the string.
hex = hexDigit + hex;
// Divide the decimal value by 16 to move to the next digit.
decimal /= 16;
}
// Return the hexadecimal value.
return hex;
}
//===========================================================
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
// }
if (currentMillis - previousMillis >=interval) {
for(int i=0; i < 5; i++)
{
id[i] = random(255);
Serial.println(id[i], HEX); // 以16進位顯示UID值
Serial.print(" ");
}
Serial.println();
json="";
String json1="";
//String json1=printHex(mfrc522.uid.uidByte, mfrc522.uid.size);
for (byte i = 0; i < 6; i++) {
json1 += id[i] < 0x10 ? "0" : "";
json1 += String(id[i], HEX);
json1 +=" ";
}
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();
Serial.println();
previousMillis = currentMillis;
// 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
}
}
////===========================================================
Node-Red 程式
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]
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