2019年的春节只有5天，二十八放假，初三上课。
放假前几分钟，我在想我能够做什么做什么，把计划中的事，未做完的事，未计划的事统统完成，大部分都是课外的事。
我确实完成了一些，但有些我却总也走不下去。歌词工具从十月份开始有想法，十一月份真正开始，到现在有三四个月了。借着这个想法我才真正熟悉了Python，后台逻辑其实一个月以前就结束了，一些改进的想法也决定搁置，没有再重构；前端最关键的部分也测试证明可行，然后我就不走了。
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最近想把网易云音乐中的英语听力下载到播放器中，方便随时听。但是只下载音频的话就少了些什么，最好连听力的歌词也下载进去。于是乎写了个小工具，可以批量下载歌单或者专辑中的音乐的歌词，可以省很多时间。
netease-lyric.py
抓取歌单中的歌曲信息，获得id spider.py
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首先恭喜IG击败LCK头号种子KT，打入四强。
然后，让我们用最饱满的热情恭喜夺冠热门RNG喜提八强，提前回家。
怎么说呢，IG赢KT我的确想到过，但是没有想到IG怎么做才能打赢KT。我曾经想过如果IG能赢KT我要吹IG一辈子，因为今天不仅是S8的四分之一决赛日，也是我的18岁生日。那么现在就是我兑现诺言的时候了。
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最近遇到了几首很好听的歌曲，为了方便，就打算将歌词编辑出来放到Kindle。大概的步骤是先在Word上排好。然后用Calibre转换成Kindle能识别的格式。最初效果很好，抱着Kindle唱歌感觉非常有B格。后来同学也让我查几首歌的歌词放上去，这样歌曲从原来的两三首增加到八首，这样一页一页的翻找就比较费力，于是乎我用Calibre编辑功能为它自动生成了目录，一切和想象中的一样顺利，但是选择目录时却遇到了一件尴尬的事：
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秋凉猛袭，世界似乎在一夜之间变得萧索了，早上出门，迎面而来的是阵阵凉意。夏和秋的分界线变得格外清晰，只是一个晚上，寒流就横扫大地，劫掠走夏天的最后几丝热量，然后君临天下，好不壮阔。接下来，便是阴雨、落叶和阴雨。
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我在忙最后一件事，这几天一直在采购东西，为这最后一件事。
一块2.5寸机械硬盘，已经无力回天，但是控制电路和电机都能用的硬盘。把它拆开，可以看到光洁的盘片，通上电还能盘片还能转动，磁头也能动。浓浓的机械的美感。
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话说最近真是干啥啥不行。
手机被收了，只能用树莓派听歌，不过我的派并没有配屏幕……所以最初的方法是：打开电脑->连上VNC->打开树莓派的浏览器访问网易云，虽然能听，但是切歌、调音量都得通过电脑调，很麻烦，而且开着Chromium树莓派发热恐怖。
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关于这个用Arduino做超声波雷达的项目，我在Create Arduino上见过很多次，这里就自己做出来试试。 主要原理是利用超声波测距，然后使用Processing在屏幕上绘制出雷达图，总体比较简单。
作为国产片中难得一见的高分电影，《我不是药神》可谓获誉无数。接着出门旅游晚上的空闲，在当地一家影院观赏了这部作品。
一说到国产电影，我对看《让子弹飞》时那种被强行喂屎一般的感觉还让我心有余悸，对国产电影一直敬而远之，不知从什么时候开始，“国产电影”就和“烂片”定下了不解之缘。《我不是药神》总算动摇了这段孽缘。因为我已很久没有看电影了，加上之前在网络上已经看过很多关于《我不是药神》的影评，即使处处小心也被剧透得差不多了，所以这里就不再在演员演技或其他方面说太多了，我和大部分人的观点基本一致。写这篇文章是为了说说《我不是药神》美中不足的一点。
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强行发（水）一篇文章。
在官方示例的基础上稍加修改制作的RFID控制的保险盒。 先上代码。
/*
--------------------------------------------------------------------------------------------------------------------
Example sketch/program showing An Arduino Door Access Control featuring RFID, EEPROM, Relay
--------------------------------------------------------------------------------------------------------------------
This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
This example showing a complete Door Access Control System
Simple Work Flow (not limited to) :
+---------+
+----------------------------------->READ TAGS+^------------------------------------------+
| +--------------------+ |
| | | |
| | | |
| +----v-----+ +-----v----+ |
| |MASTER TAG| |OTHER TAGS| |
| +--+-------+ ++-------------+ |
| | | | |
| | | | |
| +-----v---+ +----v----+ +----v------+ |
| +------------+READ TAGS+---+ |KNOWN TAG| |UNKNOWN TAG| |
| | +-+-------+ | +-----------+ +------------------+ |
| | | | | | |
| +----v-----+ +----v----+ +--v--------+ +-v----------+ +------v----+ |
| |MASTER TAG| |KNOWN TAG| |UNKNOWN TAG| |GRANT ACCESS| |DENY ACCESS| |
| +----------+ +---+-----+ +-----+-----+ +-----+------+ +-----+-----+ |
| | | | | |
| +----+ +----v------+ +--v---+ | +--------------->
+-------+EXIT| |DELETE FROM| |ADD TO| | |
+----+ | EEPROM | |EEPROM| | |
+-----------+ +------+ +-------------------------------+
Use a Master Card which is act as Programmer then you can able to choose card holders who will granted access or not
* **Easy User Interface**
Just one RFID tag needed whether Delete or Add Tags. You can choose to use Leds for output or Serial LCD module to inform users.
* **Stores Information on EEPROM**
Information stored on non volatile Arduino's EEPROM memory to preserve Users' tag and Master Card. No Information lost
if power lost. EEPROM has unlimited Read cycle but roughly 100,000 limited Write cycle.
* **Security**
To keep it simple we are going to use Tag's Unique IDs. It's simple and not hacker proof.
@license Released into the public domain.
Typical pin layout used:
-----------------------------------------------------------------------------------------
MFRC522 Arduino Arduino Arduino Arduino Arduino
Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
Signal Pin Pin Pin Pin Pin Pin
-----------------------------------------------------------------------------------------
RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
SPI SS SDA(SS) 10 53 D10 10 10
SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
*/
#include <EEPROM.h> // We are going to read and write PICC's UIDs from/to EEPROM
#include <SPI.h> // RC522 Module uses SPI protocol
#include <MFRC522.h> // Library for Mifare RC522 Devices
/*
Instead of a Relay you may want to use a servo. Servos can lock and unlock door locks too
Relay will be used by default
*/
#include <Servo.h>
/*
For visualizing whats going on hardware we need some leds and to control door lock a relay and a wipe button
(or some other hardware) Used common anode led,digitalWriting HIGH turns OFF led Mind that if you are going
to use common cathode led or just seperate leds, simply comment out #define COMMON_ANODE,
*/
#define COMMON_ANODE
#ifdef COMMON_ANODE
#define LED_ON LOW
#define LED_OFF HIGH
#else
#define LED_ON HIGH
#define LED_OFF LOW
#endif
constexpr uint8_t redLed = 41; // Set Led Pins
constexpr uint8_t greenLed = 43;
constexpr uint8_t blueLed = 45;
constexpr uint8_t relay = 4; // Set Relay Pin
constexpr uint8_t wipeB = 3; // Button pin for WipeMode
bool programMode = false; // initialize programming mode to false
uint8_t successRead; // Variable integer to keep if we have Successful Read from Reader
byte storedCard[4]; // Stores an ID read from EEPROM
byte readCard[4]; // Stores scanned ID read from RFID Module
byte masterCard[4]; // Stores master card's ID read from EEPROM
// Create MFRC522 instance.
constexpr uint8_t RST_PIN = 9; // Configurable, see typical pin layout above
constexpr uint8_t SS_PIN = 10; // Configurable, see typical pin layout above
int pos = 0; // variable to store the servo position
int restpos = 31;
int buttonState=0;
Servo myservo; // create servo object to control a servo
// twelve servo objects can be created on most boards
MFRC522 mfrc522(SS_PIN, RST_PIN);
///////////////////////////////////////// Setup ///////////////////////////////////
void setup() {
//Arduino Pin Configuration
pinMode(redLed, OUTPUT);
pinMode(greenLed, OUTPUT);
pinMode(blueLed, OUTPUT);
pinMode(wipeB, INPUT_PULLUP); // Enable pin's pull up resistor
pinMode(relay, OUTPUT);
//Be careful how relay circuit behave on while resetting or power-cycling your Arduino
digitalWrite(relay, HIGH); // Make sure door is locked
digitalWrite(redLed, LED_OFF); // Make sure led is off
digitalWrite(greenLed, LED_OFF); // Make sure led is off
digitalWrite(blueLed, LED_OFF); // Make sure led is off
//Protocol Configuration
Serial.begin(9600); // Initialize serial communications with PC
SPI.begin(); // MFRC522 Hardware uses SPI protocol
mfrc522.PCD_Init(); // Initialize MFRC522 Hardware
//If you set Antenna Gain to Max it will increase reading distance
//mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);
Serial.println(F("Access Control Example v0.1")); // For debugging purposes
ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
//Wipe Code - If the Button (wipeB) Pressed while setup run (powered on) it wipes EEPROM
if (digitalRead(wipeB) == LOW) { // when button pressed pin should get low, button connected to ground
digitalWrite(redLed, LED_ON); // Red Led stays on to inform user we are going to wipe
Serial.println(F("Wipe Button Pressed"));
Serial.println(F("You have 10 seconds to Cancel"));
Serial.println(F("This will be remove all records and cannot be undone"));
bool buttonState = monitorWipeButton(10000); // Give user enough time to cancel operation
if (buttonState == true && digitalRead(wipeB) == LOW) { // If button still be pressed, wipe EEPROM
Serial.println(F("Starting Wiping EEPROM"));
for (uint16_t x = 0; x < EEPROM.length(); x = x + 1) { //Loop end of EEPROM address
if (EEPROM.read(x) == 0) { //If EEPROM address 0
// do nothing, already clear, go to the next address in order to save time and reduce writes to EEPROM
}
else {
EEPROM.write(x, 0); // if not write 0 to clear, it takes 3.3mS
}
}
Serial.println(F("EEPROM Successfully Wiped"));
digitalWrite(redLed, LED_OFF); // visualize a successful wipe
delay(200);
digitalWrite(redLed, LED_ON);
delay(200);
digitalWrite(redLed, LED_OFF);
delay(200);
digitalWrite(redLed, LED_ON);
delay(200);
digitalWrite(redLed, LED_OFF);
}
else {
Serial.println(F("Wiping Cancelled")); // Show some feedback that the wipe button did not pressed for 15 seconds
digitalWrite(redLed, LED_OFF);
}
}
// Check if master card defined, if not let user choose a master card
// This also useful to just redefine the Master Card
// You can keep other EEPROM records just write other than 143 to EEPROM address 1
// EEPROM address 1 should hold magical number which is '143'
if (EEPROM.read(1) != 143) {
Serial.println(F("No Master Card Defined"));
Serial.println(F("Scan A PICC to Define as Master Card"));
do {
successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
digitalWrite(blueLed, LED_ON); // Visualize Master Card need to be defined
delay(200);
digitalWrite(blueLed, LED_OFF);
delay(200);
}
while (!successRead); // Program will not go further while you not get a successful read
for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times
EEPROM.write( 2 + j, readCard[j] ); // Write scanned PICC's UID to EEPROM, start from address 3
}
EEPROM.write(1, 143); // Write to EEPROM we defined Master Card.
Serial.println(F("Master Card Defined"));
}
Serial.println(F("-------------------"));
Serial.println(F("Master Card's UID"));
for ( uint8_t i = 0; i < 4; i++ ) { // Read Master Card's UID from EEPROM
masterCard[i] = EEPROM.read(2 + i); // Write it to masterCard
Serial.print(masterCard[i], HEX);
}
Serial.println("");
Serial.println(F("-------------------"));
Serial.println(F("Everything is ready"));
Serial.println(F("Waiting PICCs to be scanned"));
cycleLeds(); // Everything ready lets give user some feedback by cycling leds
pinMode(restpos, INPUT_PULLUP);
myservo.attach(8);
}
///////////////////////////////////////// Main Loop ///////////////////////////////////
void loop () {
do {
successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
// When device is in use if wipe button pressed for 10 seconds initialize Master Card wiping
if (digitalRead(wipeB) == LOW) { // Check if button is pressed
// Visualize normal operation is iterrupted by pressing wipe button Red is like more Warning to user
digitalWrite(redLed, LED_ON); // Make sure led is off
digitalWrite(greenLed, LED_OFF); // Make sure led is off
digitalWrite(blueLed, LED_OFF); // Make sure led is off
// Give some feedback
Serial.println(F("Wipe Button Pressed"));
Serial.println(F("Master Card will be Erased! in 10 seconds"));
bool buttonState = monitorWipeButton(10000); // Give user enough time to cancel operation
if (buttonState == true && digitalRead(wipeB) == LOW) { // If button still be pressed, wipe EEPROM
EEPROM.write(1, 0); // Reset Magic Number.
Serial.println(F("Master Card Erased from device"));
Serial.println(F("Please reset to re-program Master Card"));
while (1);
}
Serial.println(F("Master Card Erase Cancelled"));
}
if (programMode) {
cycleLeds(); // Program Mode cycles through Red Green Blue waiting to read a new card
}
else {
normalModeOn(); // Normal mode, blue Power LED is on, all others are off
}
}
while (!successRead); //the program will not go further while you are not getting a successful read
if (programMode) {
if ( isMaster(readCard) ) { //When in program mode check First If master card scanned again to exit program mode
Serial.println(F("Master Card Scanned"));
Serial.println(F("Exiting Program Mode"));
Serial.println(F("-----------------------------"));
programMode = false;
return;
}
else {
if ( findID(readCard) ) { // If scanned card is known delete it
Serial.println(F("I know this PICC, removing..."));
deleteID(readCard);
Serial.println("-----------------------------");
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
}
else { // If scanned card is not known add it
Serial.println(F("I do not know this PICC, adding..."));
writeID(readCard);
Serial.println(F("-----------------------------"));
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
}
}
}
else {
if ( isMaster(readCard)) { // If scanned card's ID matches Master Card's ID - enter program mode
programMode = true;
Serial.println(F("Hello Master - Entered Program Mode"));
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
Serial.print(F("I have ")); // stores the number of ID's in EEPROM
Serial.print(count);
Serial.print(F(" record(s) on EEPROM"));
Serial.println("");
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
Serial.println(F("Scan Master Card again to Exit Program Mode"));
Serial.println(F("-----------------------------"));
}
else {
if ( findID(readCard) ) { // If not, see if the card is in the EEPROM
Serial.println(F("Welcome, You shall pass"));
granted(300); // Open the door lock for 300 ms
}
else { // If not, show that the ID was not valid
Serial.println(F("You shall not pass"));
denied();
}
}
}
}
///////////////////////////////////////// Access Granted ///////////////////////////////////
void granted ( uint16_t setDelay) {
digitalWrite(blueLed, LED_OFF); // Turn off blue LED
digitalWrite(redLed, LED_OFF); // Turn off red LED
digitalWrite(greenLed, LED_ON); // Turn on green LED
/*
digitalWrite(relay, LOW); // Unlock door!
delay(setDelay); // Hold door lock open for given seconds
digitalWrite(relay, HIGH); // Relock door
*/
myservo.write(180);
delay(2000); // Hold green LED on for a second
myservo.write(90);
delay(1000); // Hold green LED on for a second
}
///////////////////////////////////////// Access Denied ///////////////////////////////////
void denied() {
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_ON); // Turn on red LED
delay(1000);
}
///////////////////////////////////////// Get PICC's UID ///////////////////////////////////
uint8_t getID() {
// Getting ready for Reading PICCs
if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue
return 0;
}
if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue
return 0;
}
// There are Mifare PICCs which have 4 byte or 7 byte UID care if you use 7 byte PICC
// I think we should assume every PICC as they have 4 byte UID
// Until we support 7 byte PICCs
Serial.println(F("Scanned PICC's UID:"));
for ( uint8_t i = 0; i < 4; i++) { //
readCard[i] = mfrc522.uid.uidByte[i];
Serial.print(readCard[i], HEX);
}
Serial.println("");
mfrc522.PICC_HaltA(); // Stop reading
return 1;
}
void ShowReaderDetails() {
// Get the MFRC522 software version
byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print(F("MFRC522 Software Version: 0x"));
Serial.print(v, HEX);
if (v == 0x91)
Serial.print(F(" = v1.0"));
else if (v == 0x92)
Serial.print(F(" = v2.0"));
else
Serial.print(F(" (unknown),probably a chinese clone?"));
Serial.println("");
// When 0x00 or 0xFF is returned, communication probably failed
if ((v == 0x00) || (v == 0xFF)) {
Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
Serial.println(F("SYSTEM HALTED: Check connections."));
// Visualize system is halted
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_ON); // Turn on red LED
while (true); // do not go further
}
}
///////////////////////////////////////// Cycle Leds (Program Mode) ///////////////////////////////////
void cycleLeds() {
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
}
//////////////////////////////////////// Normal Mode Led ///////////////////////////////////
void normalModeOn () {
digitalWrite(blueLed, LED_ON); // Blue LED ON and ready to read card
digitalWrite(redLed, LED_OFF); // Make sure Red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure Green LED is off
digitalWrite(relay, HIGH); // Make sure Door is Locked
}
//////////////////////////////////////// Read an ID from EEPROM //////////////////////////////
void readID( uint8_t number ) {
uint8_t start = (number * 4 ) + 2; // Figure out starting position
for ( uint8_t i = 0; i < 4; i++ ) { // Loop 4 times to get the 4 Bytes
storedCard[i] = EEPROM.read(start + i); // Assign values read from EEPROM to array
}
}
///////////////////////////////////////// Add ID to EEPROM ///////////////////////////////////
void writeID( byte a[] ) {
if ( !findID( a ) ) { // Before we write to the EEPROM, check to see if we have seen this card before!
uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
uint8_t start = ( num * 4 ) + 6; // Figure out where the next slot starts
num++; // Increment the counter by one
EEPROM.write( 0, num ); // Write the new count to the counter
for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times
EEPROM.write( start + j, a[j] ); // Write the array values to EEPROM in the right position
}
successWrite();
Serial.println(F("Succesfully added ID record to EEPROM"));
}
else {
failedWrite();
Serial.println(F("Failed! There is something wrong with ID or bad EEPROM"));
}
}
///////////////////////////////////////// Remove ID from EEPROM ///////////////////////////////////
void deleteID( byte a[] ) {
if ( !findID( a ) ) { // Before we delete from the EEPROM, check to see if we have this card!
failedWrite(); // If not
Serial.println(F("Failed! There is something wrong with ID or bad EEPROM"));
}
else {
uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
uint8_t slot; // Figure out the slot number of the card
uint8_t start; // = ( num * 4 ) + 6; // Figure out where the next slot starts
uint8_t looping; // The number of times the loop repeats
uint8_t j;
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that stores number of cards
slot = findIDSLOT( a ); // Figure out the slot number of the card to delete
start = (slot * 4) + 2;
looping = ((num - slot) * 4);
num--; // Decrement the counter by one
EEPROM.write( 0, num ); // Write the new count to the counter
for ( j = 0; j < looping; j++ ) { // Loop the card shift times
EEPROM.write( start + j, EEPROM.read(start + 4 + j)); // Shift the array values to 4 places earlier in the EEPROM
}
for ( uint8_t k = 0; k < 4; k++ ) { // Shifting loop
EEPROM.write( start + j + k, 0);
}
successDelete();
Serial.println(F("Succesfully removed ID record from EEPROM"));
}
}
///////////////////////////////////////// Check Bytes ///////////////////////////////////
bool checkTwo ( byte a[], byte b[] ) {
for ( uint8_t k = 0; k < 4; k++ ) { // Loop 4 times
if ( a[k] != b[k] ) { // IF a != b then false, because: one fails, all fail
return false;
}
}
return true;
}
///////////////////////////////////////// Find Slot ///////////////////////////////////
uint8_t findIDSLOT( byte find[] ) {
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
for ( uint8_t i = 1; i <= count; i++ ) { // Loop once for each EEPROM entry
readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
// is the same as the find[] ID card passed
return i; // The slot number of the card
}
}
}
///////////////////////////////////////// Find ID From EEPROM ///////////////////////////////////
bool findID( byte find[] ) {
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
for ( uint8_t i = 1; i < count; i++ ) { // Loop once for each EEPROM entry
readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
return true;
}
else { // If not, return false
}
}
return false;
}
///////////////////////////////////////// Write Success to EEPROM ///////////////////////////////////
// Flashes the green LED 3 times to indicate a successful write to EEPROM
void successWrite() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
}
///////////////////////////////////////// Write Failed to EEPROM ///////////////////////////////////
// Flashes the red LED 3 times to indicate a failed write to EEPROM
void failedWrite() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
}
///////////////////////////////////////// Success Remove UID From EEPROM ///////////////////////////////////
// Flashes the blue LED 3 times to indicate a success delete to EEPROM
void successDelete() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
}
////////////////////// Check readCard IF is masterCard ///////////////////////////////////
// Check to see if the ID passed is the master programing card
bool isMaster( byte test[] ) {
return checkTwo(test, masterCard);
}
bool monitorWipeButton(uint32_t interval) {
uint32_t now = (uint32_t)millis();
while ((uint32_t)millis() - now < interval) {
// check on every half a second
if (((uint32_t)millis() % 500) == 0) {
if (digitalRead(wipeB) != LOW)
return false;
}
}
return true;
}
复杂的地方在于连线,代码中已经标明了连接方式,注意Arduino Mega要把REST和SDA分别连接到9和10针脚上，代码中已经标注了。 第一次使用需要打开Arduino IDE的串口监视器，按照上面的信息录入管理员卡和授权访问的卡。 具体的效果是这样的：
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