linfengfeiwu的小窝

一个页面访问统计的php代码 2018-2-24

通过文件计数，每刷新一次页面就加一次。代码： <?php //数字输出网页计数器 $max_len = 9; $CounterFile = "counter.dat"; if(!file_exists($CounterFile)){ //如果计数器文件不存在 $counter = 0; $cf = fopen($CounterFile,"w"); //打开文件 fputs($cf,'0'); //初始化计数器 fclose($cf); //关闭文件 } else{ //取回当前计数器的值 $cf = fopen($CounterFile,"r"); $counter = trim(fgets($cf,$max_len)); fclose($cf); } $counter++; //计数器加一 $cf = fopen($CounterFile,"w"); //写入新的数据 fputs($cf,$counter); fclose($cf); ?> <span>访问统计： <?php echo $counter; //输出计数器 ?> 人次！</span>
树莓派使用OLED屏笔记 2018-2-12

之前多的一个OLED屏幕，拿来给树莓派试试。屏幕是SSD1306主控IIC屏，找了一圈找到一个库，试了试还可以。按以下步骤安装： sudo apt-get update sudo usermod -a -G i2c,spi,gpio pi sudo apt install python-dev python-pip libfreetype6-dev libjpeg-dev build-essential sudo apt install libsdl-dev libportmidi-dev libsdl-ttf2.0-dev libsdl-mixer1.2-dev libsdl-image1.2-dev 之后重启一次。接着： git clone https://github.com/rm-hull/luma.examples.git cd luma.examples sudo -H pip install -e . 如果中途少些什么东西，根据提示安装即可，然后再继续。全部结束后用python examples/clock.py来启动，效果如上图。不需要了按ctrl+c结束。要是需要开机自启在/etc/rc.local中加一句： cd /home/pi/文件路径 && python clock.py & 库下载：https://github.com/rm-hull/luma.examples
Arduino使用ENC28J60网络模块 2018-2-8

买了块ENC28J60网络模块来做网络实验的，实验到还没做，先记录下这个模块的用法。我这个和网上找的资料的不太一样，是5V驱动的，接3.3不工作。硬件连接： Vcc —— 5V 【注意电压！！】 GND —— GND RESET —— RESET； CS —— 片选，与“ether.begin()”的第三个参数一致；测试代码接D10； SI —— D11 （MOSI 口，见下图）； SO —— D12 （MISO 口，见下图）； SCK —— D13 （SCK 口，见下图）；库文件：https://github.com/jcw/ethercard 因为具体的东西还没做，只是先拿示例中的代码试了试功能。连线参考链接：http://blog.csdn.net/sdlgq/article/details/50371470
使用highlight.js为xhEditor编辑器增加代码高亮功能 2018-2-7

最近在修改一个简易博客，后台使用了xhEditor作为编辑器。比较小巧简单，一番折腾后可以使用了，但还少了个代码高亮的功能。去找相关资料，试了半天还是不行，教程根本无法成功。后来又找到xhEditor的文档，发现demo9给了一个示例，但用的是prettify的代码高亮，这和之前搜到的文章是一样的啊，不会用。之后又开始折腾。最终终于使用highlight.js成功实现了！下面说说过程。准备材料： highlight.js xhEditor 全部下载他们当前最新的完整包，要用到里面的东西。先测试了下highlight.js。根据官方文档，在文章页添加以下代码： <link rel="stylesheet" href="/path/to/styles/default.css"> <script src="/path/to/highlight.pack.js"></script> <script>hljs.initHighlightingOnLoad();</script> 我是直接把代码添加到了文章的模板页面里面，以保证正常加载。前两个在下载的包里找到对应的css和js文件，更改好路径即可。主题文件css可以换自己喜欢的，去官方demo页面预览后选一个就好。这个弄好后我去后台根据说明直接把 <pre><code class="html">...</code></pre> 这句写在文件里测试，成功的。其中class可以不填或者填入对应语言。测试效果如下：代码高亮正常，没有问题。下面就是要整合进xhEditor了。我是研究了demo9好久，删了改改了添的，最终折腾出来了。首先我们只需要demo9的其中这部分代码： <style type="text/css"> .btnCode { background:transparent url(prettify/code.gif) no-repeat 16px 16px; background-position:2px 2px; } </style> <script type="text/javascript" src="../jquery/jquery-1.4.4.min.js"></script> <script type="text/javascript" src="../xheditor-1.2.2.min.js"></script> <script type="text/javascript" src="../xheditor_lang/zh-cn.js"></script> <script type="text/javascript"> var editor; $(pageInit); function pageInit() { var allPlugin={ Code:{c:'btnCode',t:'插入代码',h:1,e:function(){ var _this=this; var htmlCode='<div><select id="xheCodeType"><option value="html">HTML/XML</option><option value="js">Javascript</option><option value="css">CSS</option><option value="php">PHP</option><option value="java">Java</option><option value="py">Python</option><option value="pl">Perl</option><option value="rb">Ruby</option><option value="cs">C#</option><option value="c">C++/C</option><option value="vb">VB/ASP</option><option value="">其它</option></select></div><div><textarea id="xheCodeValue" wrap="soft" spellcheck="false" style="width:300px;height:100px;" /></div><div style="text-align:right;"><input type="button" id="xheSave" value="确定" /></div>'; var jCode=$(htmlCode),jType=$('#xheCodeType',jCode),jValue=$('#xheCodeValue',jCode),jSave=$('#xheSave',jCode); jSave.click(function(){ _this.loadBookmark(); _this.pasteHTML('<pre><code class="'+jType.val()+'">'+_this.domEncode(jValue.val())+'</code></pre>'); _this.hidePanel(); return false; }); _this.saveBookmark(); _this.showDialog(jCode); }} }; editor=$('#elm1').xheditor({plugins:allPlugin}); } function submitForm(){$('#frmDemo').submit();} </script> 首先最前面那个style要留着，是定义图标的，把demo9文件夹的prettify文件夹里有一个code.gif复制出来按路径放好。然后只需要把var allPlugin这一串复制到对应的文件里，前后都一样的在function里面，editor=前面，很容易找到。最后把plugins:allPlugin插入到xheditor({})的最后，保存，清理浏览器缓存就可以了。效果如图：代码选项那根据highlight.js的语法和自己需要自己调整下就行了，我为了方便直接默认空着让它自动判断了。
自制1602时钟更新一个带星期代码 2018-2-5

之前的没有星期显示，这次改了一个带星期显示的。代码： #include <Wire.h> #include "ds3231_2.h" #include <LiquidCrystal.h> LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //UNO //LiquidCrystal lcd(7, 8, 13, 12, 11, 10);//pro mini #define BUFF_MAX 128 uint8_t time[8]; char recv[BUFF_MAX]; unsigned int recv_size = 0; unsigned long prev, interval = 1000; void setup() { Serial.begin(9600); Wire.begin(); DS3231_init(DS3231_INTCN); memset(recv, 0, BUFF_MAX); Serial.println("GET time"); lcd.begin(16, 2); lcd.clear(); Serial.println("Setting time"); //parse_cmd("T302911604102014",16); } void loop() { char in; char tempF[6]; float temperature; char buff[BUFF_MAX]; unsigned long now = millis(); struct ts t; // show time once in a while if ((now - prev > interval) && (Serial.available() <= 0)) { DS3231_get(&t); //Get time parse_cmd("C",1); temperature = DS3231_get_treg(); //Get temperature dtostrf(temperature, 5, 1, tempF); lcd.clear(); lcd.setCursor(0,0); lcd.print(t.mday); printMonth(t.mon); lcd.print("W:"); lcd.print(t.wday); lcd.print(" "); lcd.print(t.year); lcd.setCursor(0,1); //Go to second line of the LCD Screen lcd.print(t.hour); lcd.print(":"); if(t.min<10) { lcd.print("0"); } lcd.print(t.min); lcd.print(":"); if(t.sec<10) { lcd.print("0"); } lcd.print(t.sec); lcd.print(' '); lcd.print(tempF); lcd.print((char)223); lcd.print("C "); prev = now; } if (Serial.available() > 0) { in = Serial.read(); if ((in == 10 || in == 13) && (recv_size > 0)) { parse_cmd(recv, recv_size); recv_size = 0; recv[0] = 0; } else if (in < 48 || in > 122) {; // ignore ~[0-9A-Za-z] } else if (recv_size > BUFF_MAX - 2) { // drop lines that are too long // drop recv_size = 0; recv[0] = 0; } else if (recv_size < BUFF_MAX - 2) { recv[recv_size] = in; recv[recv_size + 1] = 0; recv_size += 1; } } } void parse_cmd(char *cmd, int cmdsize) { uint8_t i; uint8_t reg_val; char buff[BUFF_MAX]; struct ts t; //snprintf(buff, BUFF_MAX, "cmd was '%s' %d\n", cmd, cmdsize); //Serial.print(buff); // TssmmhhWDDMMYYYY aka set time if (cmd[0] == 84 && cmdsize == 16) { //T355720619112011 t.sec = inp2toi(cmd, 1); t.min = inp2toi(cmd, 3); t.hour = inp2toi(cmd, 5); t.wday = inp2toi(cmd, 7); t.mday = inp2toi(cmd, 8); t.mon = inp2toi(cmd, 10); t.year = inp2toi(cmd, 12) * 100 + inp2toi(cmd, 14); DS3231_set(t); Serial.println("OK"); } else if (cmd[0] == 49 && cmdsize == 1) { // "1" get alarm 1 DS3231_get_a1(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 50 && cmdsize == 1) { // "2" get alarm 1 DS3231_get_a2(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 51 && cmdsize == 1) { // "3" get aging register Serial.print("aging reg is "); Serial.println(DS3231_get_aging(), DEC); } else if (cmd[0] == 65 && cmdsize == 9) { // "A" set alarm 1 DS3231_set_creg(DS3231_INTCN | DS3231_A1IE); //ASSMMHHDD for (i = 0; i < 4; i++) { time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // ss, mm, hh, dd } byte flags[5] = { 0, 0, 0, 0, 0 }; DS3231_set_a1(time[0], time[1], time[2], time[3], flags); DS3231_get_a1(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 66 && cmdsize == 7) { // "B" Set Alarm 2 DS3231_set_creg(DS3231_INTCN | DS3231_A2IE); //BMMHHDD for (i = 0; i < 4; i++) { time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // mm, hh, dd } byte flags[5] = { 0, 0, 0, 0 }; DS3231_set_a2(time[0], time[1], time[2], flags); DS3231_get_a2(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 67 && cmdsize == 1) { // "C" - get temperature register Serial.print("temperature reg is "); Serial.println(DS3231_get_treg(), DEC); } else if (cmd[0] == 68 && cmdsize == 1) { // "D" - reset status register alarm flags reg_val = DS3231_get_sreg(); reg_val &= B11111100; DS3231_set_sreg(reg_val); } else if (cmd[0] == 70 && cmdsize == 1) { // "F" - custom fct reg_val = DS3231_get_addr(0x5); Serial.print("orig "); Serial.print(reg_val,DEC); Serial.print("month is "); Serial.println(bcdtodec(reg_val & 0x1F),DEC); } else if (cmd[0] == 71 && cmdsize == 1) { // "G" - set aging status register DS3231_set_aging(0); } else if (cmd[0] == 83 && cmdsize == 1) { // "S" - get status register Serial.print("status reg is "); Serial.println(DS3231_get_sreg(), DEC); } else { Serial.print("unknown command prefix "); Serial.println(cmd[0]); Serial.println(cmd[0], DEC); } } void printMonth(int month) { switch(month) { case 1: lcd.print(" M:1 ");break; case 2: lcd.print(" M:2 ");break; case 3: lcd.print(" M:3 ");break; case 4: lcd.print(" M:4 ");break; case 5: lcd.print(" M:5 ");break; case 6: lcd.print(" M:6 ");break; case 7: lcd.print(" M:7 ");break; case 8: lcd.print(" M:8 ");break; case 9: lcd.print(" M:9 ");break; case 10: lcd.print(" M:10 ");break; case 11: lcd.print(" M:11 ");break; case 12: lcd.print(" M:12 ");break; default: lcd.print(" Error ");break; } } 显示效果（M代表月份，W代表星期）：
Digispark开发板制作启动密钥 2018-2-1

这是个非常迷你的开发板，无意中看到的，就顺带买了个玩玩。这次要做一个电脑开机密码自动输入装置，虽然我现在电脑都是指纹了，不过拿来玩玩还是可以的。只要插上电脑，按一下按钮就OK了。硬件准备： Digispark一块按钮一个 10KΩ电阻一个将按钮焊接在p0和p2两脚，将电阻焊接在p0和p1两脚即可。使用Arduino IDE为Digispark编程：在首选项里添加附加开发板，输入http://digistump.com/package_digistump_index.json 驱动下载：https://github.com/digistump/DigistumpArduino/tree/master/tools 保存后去开发板管理里添加Digispark，编程时选默认的第一个就行。注意，这个板子要先点击上传，再插入电脑，才能正常的烧录程序。代码： #include "DigiKeyboard.h" void setup() { pinMode(0, INPUT); pinMode(1, OUTPUT); pinMode(2, OUTPUT); digitalWrite(1, LOW); digitalWrite(2, HIGH); // Makes OS identify this device as keyboard DigiKeyboard.sendKeyStroke(0); } void loop() { if(digitalRead(0) == HIGH) { insertPassword(); } } // Example to use Digispark as physical password token void insertPassword() { DigiKeyboard.println("password"); delay (500); } 我焊的效果图：每次按一下按钮就会自动输入密码啦~ 参考链接：https://www.youtube.com/watch?v=trx5ZWl9i3Q
NanoPiNEO安装使用aria2下载器 2018-2-1

每次遇到那种下载很慢的资源，电脑都要开一个晚上去下，太费电了。于是想到用NanoPiNEO来搭建一个下载机。选了几个软件后决定用aria2来用。在试了dietpi自带的软件商店后发现怎么都配置不好，算了，又找到个一键安装脚本。代码： #!/bin/sh DOWNLOAD_DIR="${HOME}/MiniDLNA" CONFIG_DIR="${HOME}/.aria2" RPC_TOKEN="123456" RPC_PORT="6800" change_apt_source(){ if [ -f /etc/apt/sources.list ]; then sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak fi sudo sed -i '/^deb.*/s/^/# /g' /etc/apt/sources.list sudo chmod 666 /etc/apt/sources.list sudo echo "deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ jessie main non-free contrib" >> /etc/apt/sources.list sudo echo "deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ jessie main non-free contrib" >> /etc/apt/sources.list sudo chmod 644 /etc/apt/sources.list } # change_apt_source sudo apt-get update sudo apt-get install -y aria2 ca-certificates if [ ! -d ${DOWNLOAD_DIR} ]; then mkdir -p ${DOWNLOAD_DIR} fi if [ ! -d ${CONFIG_DIR} ]; then mkdir -p ${CONFIG_DIR} fi if [ ! -f ${CONFIG_DIR}/aria2.session ]; then touch ${CONFIG_DIR}/aria2.session fi if [ ! -f ${CONFIG_DIR}/aria2.log ]; then touch ${CONFIG_DIR}/aria2.log fi if [ -f ${CONFIG_DIR}/aria2.conf ];then mv ${CONFIG_DIR}/aria2.conf ${CONFIG_DIR}/aria2.conf.bak fi # Generate cfg file cat > ${CONFIG_DIR}/aria2.conf <<-EOCFG # For full reference: # https://aria2.github.io/manual/en/html/aria2c.html ## dir=${DOWNLOAD_DIR} file-allocation=trunc continue=true # daemon=true ## log=${CONFIG_DIR}/aria2.log console-log-level=warn log-level=notice ## max-concurrent-downloads=5 max-connection-per-server=10 min-split-size=5M split=10 disable-ipv6=true ## input-file=${CONFIG_DIR}/aria2.session save-session=${CONFIG_DIR}/aria2.session save-session-interval=30 ## enable-rpc=true rpc-allow-origin-all=true rpc-listen-all=true rpc-listen-port=${RPC_PORT} rpc-secret=${RPC_TOKEN} ## follow-torrent=mem follow-metalink=mem enable-dht6=false peer-id-prefix=-TR2770- user-agent=Transmission/2.77 seed-time=0 #seed-ratio=1.0 bt-seed-unverified=true bt-save-metadata=true EOCFG # MiniDLNA sudo apt-get install -y minidlna sudo cp /etc/minidlna.conf /etc/minidlna.conf.origin sudo sed -i 's#^media_dir=/.*#media_dir='${DOWNLOAD_DIR}'#g' /etc/minidlna.conf sudo sed -i '/#inotify=yes/s/#//g' minidlna.conf #Enable media auto discover sudo sed -i '$a fs.inotify.max_user_watches=65536' /etc/sysctl.conf # aria2-webui on lighttpd sudo apt-get install -y lighttpd unzip wget https://github.com/ziahamza/webui-aria2/archive/master.zip unzip -qu master.zip cd webui-aria2-master/ change_token(){ sed -i '/token:/s/\/\///g' configuration.js sed -i 's/\$YOUR_SECRET_TOKEN\$/'${RPC_TOKEN}'/g' configuration.js } # change_token sudo cp -Rfu . /var/www/html/ cd .. rm -rf webui-aria2-master master.zip echo "Done!" echo "Your Aria2 configuration and log file are in : ${CONFIG_DIR}" echo "Your RPC token is: ${RPC_TOKEN}" echo "Start aria2 with 'aria2c -D' and enjoy!" 新建一个文件，命名为aria2.sh，将代码粘贴进去，上传到服务器。如果遇到执行时提示解释器错误，就在电脑上用notepad++，编辑-转换格式，选择转换成unix即可。 cd切换到当前目录。 chmod +x aria2.sh 给文件可执行权限。 ./aria2.sh 开始安装。完成后使用aria2c -D 指令来开启服务，连接密码默认为123456。如果提示找不到文件就手动将aria2c文件复制过去。网页端在/var/www/html，访问填入密码即可。还可以自行修改保存文件位置等。开机启动：在/etc/rc.local中exit0前面加入aria2c -D 即可。补充：之前弄好后磁力下载一直没速度，还以为是资源问题，后来查了下配置文件少东西。需要在最后添加解析源。最后一行加上bt-tracker=，后面的内容从https://github.com/ngosang/trackerslist/blob/master/trackers_all.txt这里获取，都添加上，每个中间以,相隔，之后保存重启服务即可。原始代码来源：https://gist.github.com/duckee25/94f8eb36330b139bc4b4310c42c0ae45
D1 mini+OLED制作世界时钟 2018-1-26

这个完全是个小玩意，国外找的基本照抄了稍微改了下。可以显示纽约、伦敦、北京和东京这四个时间，设置好WiFi后自动联网获取时间，无需手动干预。硬件： D1 mini（esp8266）主板一块 OLED IIC显示模块一个连接线若干（我是直接两个插在一起了）链接： OLED： VCC —— VCC GND —— GND SDA —— D3 SCL —— D4 D1 mini使用arduino IDE：首先打开IDE，文件—首选项，在附加开发板里面添加： http://arduino.esp8266.com/stable/package_esp8266com_index.json 之后保存，在工具—开发板—开发板管理器，这里找到ESP8266安装。（如果下载不了定义请自行扶梯子）之后在开发板那里选中Wemos D1（Retired）或者 Wemos D1 mini（这个可能高版本库会不能用但又没前面那个选项那就选NODE MCU 1.0）代码： #include <ESP8266WiFi.h> #include <Ticker.h> #include <JsonListener.h> #include "SSD1306Wire.h" #include "OLEDDisplayUi.h" #include "Wire.h" #include "WorldClockClient.h" #include "icons.h" #include "fonts.h" /*************************** * Begin Settings **************************/ // WIFI const char* WIFI_SSID = "WiFi名称"; const char* WIFI_PWD = "WiFi密码"; // Setup const int UPDATE_INTERVAL_SECS = 10 * 60; // Update every 10 minutes // Display Settings const int I2C_DISPLAY_ADDRESS = 0x3c; const int SDA_PIN = D3; const int SDC_PIN = D4; // TimeClient settings // Initialize the oled display for address 0x3c // sda-pin=14 and sdc-pin=12 SSD1306Wire display(I2C_DISPLAY_ADDRESS, SDA_PIN, SDC_PIN); OLEDDisplayUi ui ( &display ); /*************************** * End Settings **************************/ String timeZoneIds [] = {"America/New_York", "Europe/London", "Asia/Shanghai", "Asia/Tokyo"}; WorldClockClient worldClockClient("de", "CH", "E, dd. MMMMM yyyy", 4, timeZoneIds); // flag changed in the ticker function every 10 minutes bool readyForUpdate = false; String lastUpdate = "--"; Ticker ticker; void updateData(OLEDDisplay *display) { drawProgress(display, 50, "Updating Time..."); worldClockClient.updateTime(); drawProgress(display, 100, "Done..."); readyForUpdate = false; delay(1000); } void drawProgress(OLEDDisplay *display, int percentage, String label) { display->clear(); display->setTextAlignment(TEXT_ALIGN_CENTER); display->setFont(ArialMT_Plain_10); display->drawString(64, 10, label); display->drawProgressBar(10, 28, 108, 12, percentage); display->display(); } void drawClock(OLEDDisplay *display, int x, int y, int timeZoneIndex, String city, const char* icon) { display->setTextAlignment(TEXT_ALIGN_LEFT); display->setFont(ArialMT_Plain_10); display->drawString(x + 60, y + 5, city); display->setFont(Crushed_Plain_36); display->drawXbm(x, y, 60, 60, icon); display->drawString(x + 60, y + 15, worldClockClient.getHours(timeZoneIndex) + ":" + worldClockClient.getMinutes(timeZoneIndex)); } void drawFrame1(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) { drawClock(display, x, y, 0, "New York", new_york_bits); } void drawFrame2(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) { drawClock(display, x, y, 1, "London", london_bits); } void drawFrame3(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) { drawClock(display, x, y, 2, "Beijing", austin_bits); } void drawFrame4(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) { drawClock(display, x, y, 3, "Tokyo", tokyo_bits); } void setReadyForWeatherUpdate() { Serial.println("Setting readyForUpdate to true"); readyForUpdate = true; } // this array keeps function pointers to all frames // frames are the single views that slide from right to left FrameCallback frames[] = { drawFrame1, drawFrame2, drawFrame3, drawFrame4}; int numberOfFrames = 4; void setup() { Serial.begin(115200); Serial.println(); Serial.println(); // initialize dispaly display.init(); display.clear(); display.display(); //display.flipScreenVertically(); display.setFont(ArialMT_Plain_10); display.setTextAlignment(TEXT_ALIGN_CENTER); display.setContrast(255); WiFi.begin(WIFI_SSID, WIFI_PWD); int counter = 0; while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); display.clear(); display.drawString(64, 10, "Connecting to WiFi"); display.drawXbm(46, 30, 8, 8, counter % 3 == 0 ? activeSymbol : inactiveSymbol); display.drawXbm(60, 30, 8, 8, counter % 3 == 1 ? activeSymbol : inactiveSymbol); display.drawXbm(74, 30, 8, 8, counter % 3 == 2 ? activeSymbol : inactiveSymbol); display.display(); counter++; } ui.setTargetFPS(30); // You can change this to // TOP, LEFT, BOTTOM, RIGHT ui.setIndicatorPosition(BOTTOM); // Defines where the first frame is located in the bar. ui.setIndicatorDirection(LEFT_RIGHT); // You can change the transition that is used // SLIDE_LEFT, SLIDE_RIGHT, SLIDE_TOP, SLIDE_DOWN ui.setFrameAnimation(SLIDE_LEFT); // Add frames ui.setFrames(frames, numberOfFrames); // Inital UI takes care of initalising the display too. ui.init(); Serial.println(""); updateData(&display); ticker.attach(UPDATE_INTERVAL_SECS, setReadyForWeatherUpdate); } void loop() { if (readyForUpdate && ui.getUiState()->frameState == FIXED) { updateData(&display); } int remainingTimeBudget = ui.update(); if (remainingTimeBudget > 0) { // You can do some work here // Don't do stuff if you are below your // time budget. delay(remainingTimeBudget); } } 用到的库文件： https://github.com/squix78/esp8266-weather-station（主要文件，也是本文的参考链接，原始代码在examples里） https://github.com/squix78/esp8266-oled-ssd1306 https://github.com/squix78/json-streaming-parser 效果图：
Arduino+LCD1602制作电子时钟 2018-1-23

迷恋各种arduino的电子钟，这次是一个基于1602显示加DS3231时钟模块的版本。硬件： Arduino UNO（特殊版带1602接口）一块 LCD1602显示模块一个 DS3231模块一个杜邦线若干接线： 1602：因为板子特殊，留有直插口所以直接插上就行了。板子如下：通过原理图查询得知它的接口就是自带1602库里面的标准接口，直接用就行，不用改引脚。附上电路图，方便查阅：德飞莱LY-AVR-F1电路图.pdf DS3231： VCC —— VCC GND —— GND SCL —— SCL/A5 SDA —— SDA/A4 显示代码： #include <Wire.h> #include "ds3231_2.h" #include <LiquidCrystal.h> LiquidCrystal lcd(12, 11, 5, 4, 3, 2); #define BUFF_MAX 128 uint8_t time[8]; char recv[BUFF_MAX]; unsigned int recv_size = 0; unsigned long prev, interval = 1000; void setup() { Serial.begin(9600); Wire.begin(); DS3231_init(DS3231_INTCN); memset(recv, 0, BUFF_MAX); Serial.println("GET time"); lcd.begin(16, 2); lcd.clear(); Serial.println("Setting time"); //parse_cmd("T302911604102014",16); } void loop() { char in; char tempF[6]; float temperature; char buff[BUFF_MAX]; unsigned long now = millis(); struct ts t; // show time once in a while if ((now - prev > interval) && (Serial.available() <= 0)) { DS3231_get(&t); //Get time parse_cmd("C",1); temperature = DS3231_get_treg(); //Get temperature dtostrf(temperature, 5, 1, tempF); lcd.clear(); lcd.setCursor(0,0); lcd.print(t.mday); printMonth(t.mon); lcd.print(t.year); lcd.setCursor(0,1); //Go to second line of the LCD Screen lcd.print(t.hour); lcd.print(":"); if(t.min<10) { lcd.print("0"); } lcd.print(t.min); lcd.print(":"); if(t.sec<10) { lcd.print("0"); } lcd.print(t.sec); lcd.print(' '); lcd.print(tempF); lcd.print((char)223); lcd.print("C "); prev = now; } if (Serial.available() > 0) { in = Serial.read(); if ((in == 10 || in == 13) && (recv_size > 0)) { parse_cmd(recv, recv_size); recv_size = 0; recv[0] = 0; } else if (in < 48 || in > 122) {; // ignore ~[0-9A-Za-z] } else if (recv_size > BUFF_MAX - 2) { // drop lines that are too long // drop recv_size = 0; recv[0] = 0; } else if (recv_size < BUFF_MAX - 2) { recv[recv_size] = in; recv[recv_size + 1] = 0; recv_size += 1; } } } void parse_cmd(char *cmd, int cmdsize) { uint8_t i; uint8_t reg_val; char buff[BUFF_MAX]; struct ts t; //snprintf(buff, BUFF_MAX, "cmd was '%s' %d\n", cmd, cmdsize); //Serial.print(buff); // TssmmhhWDDMMYYYY aka set time if (cmd[0] == 84 && cmdsize == 16) { //T355720619112011 t.sec = inp2toi(cmd, 1); t.min = inp2toi(cmd, 3); t.hour = inp2toi(cmd, 5); t.wday = inp2toi(cmd, 7); t.mday = inp2toi(cmd, 8); t.mon = inp2toi(cmd, 10); t.year = inp2toi(cmd, 12) * 100 + inp2toi(cmd, 14); DS3231_set(t); Serial.println("OK"); } else if (cmd[0] == 49 && cmdsize == 1) { // "1" get alarm 1 DS3231_get_a1(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 50 && cmdsize == 1) { // "2" get alarm 1 DS3231_get_a2(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 51 && cmdsize == 1) { // "3" get aging register Serial.print("aging reg is "); Serial.println(DS3231_get_aging(), DEC); } else if (cmd[0] == 65 && cmdsize == 9) { // "A" set alarm 1 DS3231_set_creg(DS3231_INTCN | DS3231_A1IE); //ASSMMHHDD for (i = 0; i < 4; i++) { time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // ss, mm, hh, dd } byte flags[5] = { 0, 0, 0, 0, 0 }; DS3231_set_a1(time[0], time[1], time[2], time[3], flags); DS3231_get_a1(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 66 && cmdsize == 7) { // "B" Set Alarm 2 DS3231_set_creg(DS3231_INTCN | DS3231_A2IE); //BMMHHDD for (i = 0; i < 4; i++) { time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // mm, hh, dd } byte flags[5] = { 0, 0, 0, 0 }; DS3231_set_a2(time[0], time[1], time[2], flags); DS3231_get_a2(&buff[0], 59); Serial.println(buff); } else if (cmd[0] == 67 && cmdsize == 1) { // "C" - get temperature register Serial.print("temperature reg is "); Serial.println(DS3231_get_treg(), DEC); } else if (cmd[0] == 68 && cmdsize == 1) { // "D" - reset status register alarm flags reg_val = DS3231_get_sreg(); reg_val &= B11111100; DS3231_set_sreg(reg_val); } else if (cmd[0] == 70 && cmdsize == 1) { // "F" - custom fct reg_val = DS3231_get_addr(0x5); Serial.print("orig "); Serial.print(reg_val,DEC); Serial.print("month is "); Serial.println(bcdtodec(reg_val & 0x1F),DEC); } else if (cmd[0] == 71 && cmdsize == 1) { // "G" - set aging status register DS3231_set_aging(0); } else if (cmd[0] == 83 && cmdsize == 1) { // "S" - get status register Serial.print("status reg is "); Serial.println(DS3231_get_sreg(), DEC); } else { Serial.print("unknown command prefix "); Serial.println(cmd[0]); Serial.println(cmd[0], DEC); } } void printMonth(int month) { switch(month) { case 1: lcd.print(" January ");break; case 2: lcd.print(" February ");break; case 3: lcd.print(" March ");break; case 4: lcd.print(" April ");break; case 5: lcd.print(" May ");break; case 6: lcd.print(" June ");break; case 7: lcd.print(" July ");break; case 8: lcd.print(" August ");break; case 9: lcd.print(" September ");break; case 10: lcd.print(" October ");break; case 11: lcd.print(" November ");break; case 12: lcd.print(" December ");break; default: lcd.print(" Error ");break; } } 用到的库文件：https://github.com/rodan/ds3231 串口调时间代码： #include <DS3231test.h> #include <Wire.h> DS3231 Clock; bool Century=false; bool h12; bool PM; byte ADay, AHour, AMinute, ASecond, ABits; bool ADy, A12h, Apm; int year, month, date, DoW,week , hour, minute, second,temperature; String comdata = ""; int numdata[7] = {0}, mark = 0; void setup (void) { Serial.begin(9600); //Wire.begin(); Serial.println("set_time :"); Serial.println("year mouth day week hour minute second"); Serial.println(); Serial.println("week : 1 -> Sunday; 2 -> Monday; 3 -> Tuesday: ....7 -> Saturday"); Serial.println(); Serial.println("for example :2014-5-20 Tue 0:33:30 "); Serial.println("set_time :"); Serial.println("14 5 20 3 0 33 30"); Serial.println(); } void set_time() //DS3231设置时间 { Wire.begin(); Clock.setSecond(numdata[6]); //秒 Clock.setMinute(numdata[5]); //分 Clock.setHour(numdata[4]); //时 Clock.setDoW(numdata[3]); //周 Clock.setDate(numdata[2]); //日 Clock.setMonth(numdata[1]); //月 Clock.setYear(numdata[0]); //年 } void loop (void) { int j = 0; while (Serial.available() > 0) //检测串口是否有数据 { comdata += char(Serial.read()); delay(2); mark = 1; } if(mark == 1) { Serial.println(comdata); //串口打印检测到的数据 for(int i = 0; i < comdata.length() ; i++) { if(comdata[i] == ' ') { j++; } else { numdata[j] = numdata[j] * 10 + (comdata[i] - '0'); } } comdata = String(""); Serial.print("set_time... "); set_time(); Serial.println(" OK "); for(int i = 0; i < 7; i++) { numdata[i] = 0; } mark = 0; } } 用到的库文件：http://image.geek-workshop.com/forum/201405/20/131459ouvueuv08gph0uqh.rar?_upd=DS3231.rar（注意库文件的重命名，两个都是，.h和.cpp都要修改，.cpp里还要修改对应的.h名称）调时间说明：打开arduino 串口监视器输入要设定日期以及时间格式为（年+空格+月+空格+日+空格+星期+空格+时+空格+分+空格+秒）设置中星期：01对应星期天；02对应星期一；03对应星期二；……07对应星期六例如：现在是 2014年5月20日星期二 13：35：00 那么在串口数据发送栏中输入： 14 05 20 03 13 35 00 先烧录调时间的代码，完成后再烧录显示代码即可。效果图：参考链接： http://www.geek-workshop.com/thread-9841-1-1.html http://educ8s.tv/arduino-project-real-time-clock-with-ds3231-module/
如何批量更改文件扩展名？ 2017-11-24

每次从网页下图片都会遇到扩展名被更改的情况，下面就用批处理指令来完成这一工作。在文件夹下新建一个文本文档，输入 ren *.gif *.jpg *.gif为需要修改的扩展名。 *.jpg为目标扩展名。最后把.txt改为.bat运行即可。