projInit

README.md

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+# RFIDSwitch
+
+使用Arduino开发的RFID读卡识别开关模块
+
+# 使用硬件
+ESP8266-NodeMCU x 1，ssd1306 x 1，RFID-RC522（13.56Mhz）x 1，LED灯 x 1  
+
+# 接线说明
+
+## 1.ssd1306(I2C模拟)
+VCC-3v  
+GND-G  
+SCL-D1--GPIO5  
+SDA-D2--GPIO4  
+
+## 2.RFID-RC522(SPI)  
+SDA-D8--GPIO15  
+SCK-D5--GPIO14  
+MOSI-D7--GPIO13  
+MISO-D6--GPIO12  
+IRQ-不接（或者读信号口）  
+GND-G  
+RST-D3--GPIO0  
+3V3-3V  
+
+## 3.LED
+VCC-D0--GPIO16  
+GND-G  

RFIDSwitch/RFIDSwitch.ino

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+
+#include <U8g2lib.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <MFRC522.h>
+
+#define SS_PIN 15
+#define RST_PIN 0
+#define LIGHT1_PIN 16
+
+MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance.
+MFRC522::MIFARE_Key key;
+String decResult = "";
+bool isLED1_open = false;
+
+// Please UNCOMMENT one of the contructor lines below
+// U8g2 Contructor List (Frame Buffer)
+U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
+
+// End of constructor list
+
+void drawBattery(int posX,int posY,int energy){
+  u8g2.drawBox(posX, posY+3, 2, 4);
+  u8g2.drawFrame(posX+2, posY, 20, 10);
+  //energy
+  u8g2.drawBox(posX+4+(16-energy), posY+2, energy, 6);
+}
+
+void updateOledMsg(const char *s){
+  u8g2.begin();
+  u8g2.clearBuffer();					// clear the internal memory
+  u8g2.setFont(u8g2_font_6x12_mr);
+  u8g2.drawStr(0,46,s);
+  u8g2.sendBuffer();					// transfer internal memory to the display
+}
+
+void printDec(byte *buffer, byte bufferSize) {
+  decResult = "";
+  for (byte i = 0; i < bufferSize; i++) {
+    //Serial.print(buffer[i] < 0x10 ? " 0" : " ");
+    Serial.print(buffer[i]);
+    Serial.print(" ");
+    //strcat(decResult, " ");
+    // itoa((int)buffer[i],decResult,10);
+    decResult.concat(String(buffer[i]));
+    decResult.concat(" ");
+  }
+  Serial.print("\n");
+  Serial.print(decResult);
+  
+}
+
+void printHex(byte *buffer, byte bufferSize) {
+  for (byte i = 0; i < bufferSize; i++) {
+    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
+    Serial.print(buffer[i], HEX);
+  }
+}
+
+void verifiedLight(){
+  if(decResult == "156 43 24 50 "){
+    if(!isLED1_open){
+      digitalWrite(LIGHT1_PIN, HIGH);
+      isLED1_open = true;
+    }else{
+      digitalWrite(LIGHT1_PIN, LOW);
+      isLED1_open = false;
+    }
+    
+  }
+}
+
+void setup(void) {
+  Serial.begin(115200);   // Initiate a serial communication
+  SPI.begin();      // Initiate  SPI bus
+  mfrc522.PCD_Init();   // Initiate MFRC522
+  Serial.println("Approximate your card to the reader...");
+  Serial.println();
+  for (byte i = 0; i < 6; i++) {
+    key.keyByte[i] = 0xFF;
+  }
+  Serial.println(F("This code scan the MIFARE Classsic NUID."));
+  Serial.print(F("Using the following key:"));
+  printHex(key.keyByte, MFRC522::MF_KEY_SIZE);
+
+  u8g2.begin();
+  u8g2.clearBuffer();					// clear the internal memory
+  u8g2.setFont(u8g2_font_freedoomr25_tn);	// choose a suitable font
+  u8g2.drawStr(19,40,"12:59");	// write something to the internal memory
+  u8g2.setFont(u8g2_font_6x12_mr);
+  u8g2.drawStr(0,46,"No Cards info");
+  drawBattery(0,0,6);
+  u8g2.sendBuffer();					// transfer internal memory to the display
+
+  pinMode(LIGHT1_PIN, OUTPUT); 
+  digitalWrite(LIGHT1_PIN, LOW);
+
+}
+
+void loop(void) {
+  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
+  if (!mfrc522.PICC_IsNewCardPresent())
+    return;
+  // Verify if the NUID has been readed
+  if (!mfrc522.PICC_ReadCardSerial())
+    return;
+
+  Serial.print(F("PICC type: "));
+  MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
+  Serial.println(mfrc522.PICC_GetTypeName(piccType));
+  printDec(mfrc522.uid.uidByte, mfrc522.uid.size);
+  Serial.print(mfrc522.uid.sak);
+  updateOledMsg(decResult.c_str());
+  // 停止 PICC
+  mfrc522.PICC_HaltA();
+  //停止加密PCD
+  mfrc522.PCD_StopCrypto1();
+  verifiedLight();
+  delay(3000);        // Wait for a second
+  updateOledMsg("No cards info");
+  decResult = "";
+}