diff --git a/index.html b/index.html
index 8c002c3..bacb027 100644
--- a/index.html
+++ b/index.html
@@ -1,38 +1,46 @@
 <!doctype html>
 <html>
+
 <head>
-<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
-<title>vTools 简约、极客的工具站导航</title>
+    <meta charset='UTF-8'>
+    <meta name='viewport' content='width=device-width initial-scale=1'>
+    <title>vTools 简约、极客的工具站导航</title>
 </head>
 
 <body>
 
-<h1>vTools 简约、极客的工具站</h1>
+    <h1>vTools 简约、极客的工具站</h1>
 
-<h2>编码转换</h2>
-<ul>
-<li>Base64: <a href='https://www.base64decode.org/' target='_blank'>https://www.base64decode.org/</a></li>
-<li>UUID: <a href='https://www.uuidgenerator.net/' target='_blank'>https://www.uuidgenerator.net/</a></li>
-<li>图片转 SVG: <a href='https://www.pngtosvg.com/' target='_blank'>https://www.pngtosvg.com/</a></li>
-<li>随机十六进制数生成: <a href='https://www.browserling.com/tools/random-hex' target='_blank'>https://www.browserling.com/tools/random-hex</a></li>
-<li>图片隐形水印删除工具: <a href='https://tools.vvzero.com/dewatermark/' target='_blank'>https://tools.vvzero.com/dewatermark/</a></li>
-</ul>
+    <h2>编码转换</h2>
+    <ul>
+        <li>Base64: <a href='https://www.base64decode.org/' target='_blank'>https://www.base64decode.org/</a></li>
+        <li>UUID: <a href='https://www.uuidgenerator.net/' target='_blank'>https://www.uuidgenerator.net/</a></li>
+        <li>图片转 SVG: <a href='https://www.pngtosvg.com/' target='_blank'>https://www.pngtosvg.com/</a></li>
+        <li>随机十六进制数生成: <a href='https://www.browserling.com/tools/random-hex' target='_blank'>https://www.browserling.com/tools/random-hex</a></li>
+        <li>图片隐形水印删除工具: <a href='https://tools.vvzero.com/dewatermark/' target='_blank'>https://tools.vvzero.com/dewatermark/</a></li>
+        <li>位图转换为二进制数据: <a href='http://javl.github.io/image2cpp/' target='_blank'>http://javl.github.io/image2cpp/</a>
+        </li>
+        <li>Markdown 转 HTML: <a href='https://markdowntohtml.com/' target='_blank'>https://markdowntohtml.com/</a></li>
+    </ul>
 
-<h2>硬件检测</h2>
-<ul>
-<li>鼠标双击检测: <a href='https://cps-check.com/cn/double-click-test' target='_blank'>https://cps-check.com/cn/double-click-test</a></li>
-</ul>
+    <h2>硬件检测</h2>
+    <ul>
+        <li>鼠标双击检测: <a href='https://cps-check.com/cn/double-click-test' target='_blank'>https://cps-check.com/cn/double-click-test</a></li>
+    </ul>
 
-<h2>资料下载</h2>
-<ul>
-<li>IP Blocks: <a href='https://www.ipdeny.com/ipblocks/' target='_blank'>https://www.ipdeny.com/ipblocks/</a></li>
-</ul>
+    <h2>参考资料</h2>
+    <ul>
+        <li>IP Blocks: <a href='https://www.ipdeny.com/ipblocks/' target='_blank'>https://www.ipdeny.com/ipblocks/</a>
+        </li>
+        <li>树莓派引脚定义: <a href='https://pinout.vvzero.com' target='_blank'>https://pinout.vvzero.com/</a></li>
+        <li>ESP8266 引脚对照表: <a href='pinout/esp8266.html' target='_blank'>pinout/esp8266.html</a></li>
+    </ul>
 
-<h2>通用教程</h2>
-<ul>
-<li>成为 CA，并签发自己的证书: <a href='https://blog.vvzero.com/2021/01/24/Become-a-CA-and-generate-self-signed-certificate/' target='_blank'>https://blog.vvzero.com/2021/01/24/Become-a-CA-and-generate-self-signed-certificate/</a></li>
-<li>How to check if port is in use on Linux or Unix: <a href='https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/' target='_blank'>https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/</a></li>
-</ul>
+    <h2>通用教程</h2>
+    <ul>
+        <li>成为 CA，并签发自己的证书: <a href='https://blog.vvzero.com/2021/01/24/Become-a-CA-and-generate-self-signed-certificate/' target='_blank'>https://blog.vvzero.com/2021/01/24/Become-a-CA-and-generate-self-signed-certificate/</a></li>
+        <li>How to check if port is in use on Linux or Unix: <a href='https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/' target='_blank'>https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/</a></li>
+    </ul>
 
 </body>
 
diff --git a/pinout/esp8266.html b/pinout/esp8266.html
new file mode 100644
index 0000000..4b59665
--- /dev/null
+++ b/pinout/esp8266.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<html>
+<head>
+<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
+<title>esp8266</title>
+</head>
+<body><h1 id='esp8266-引脚对照表'>ESP8266 引脚对照表</h1>
+<h2 id='esp-12fe-nodemcu'>ESP-12F(E) NodeMCU</h2>
+<figure><table>
+<thead>
+<tr><th>IO</th><th>Arduino</th><th>芯片引脚号</th><th>备注</th></tr></thead>
+<tbody><tr><td>IO16</td><td>D0</td><td>8</td><td>&nbsp;</td></tr><tr><td>IO5</td><td>D1</td><td>24</td><td>&nbsp;</td></tr><tr><td>IO4</td><td>D2</td><td>16</td><td>&nbsp;</td></tr><tr><td>IO0</td><td>D3</td><td>15</td><td>&nbsp;</td></tr><tr><td>IO2</td><td>D4</td><td>14</td><td>&nbsp;</td></tr><tr><td>IO14</td><td>D5</td><td>9</td><td>&nbsp;</td></tr><tr><td>IO12</td><td>D6</td><td>10</td><td>&nbsp;</td></tr><tr><td>IO13</td><td>D7</td><td>12</td><td>&nbsp;</td></tr><tr><td>IO15</td><td>D8</td><td>13</td><td>&nbsp;</td></tr><tr><td>IO3</td><td>RX</td><td>25</td><td>&nbsp;</td></tr><tr><td>IO1</td><td>TX</td><td>26</td><td>&nbsp;</td></tr><tr><td>ADC0</td><td>A0</td><td>6</td><td>&nbsp;</td></tr></tbody>
+</table></figure>
+<p>&nbsp;</p>
+</body>
+</html>
\ No newline at end of file
diff --git a/pinout/esp8266.md b/pinout/esp8266.md
new file mode 100644
index 0000000..1ea70a2
--- /dev/null
+++ b/pinout/esp8266.md
@@ -0,0 +1,18 @@
+# ESP8266 引脚对照表
+
+## ESP-12F(E) NodeMCU
+
+| IO | Arduino | 芯片引脚号 | 备注 |
+|---|---|---|---|
+| IO16 | D0 | 8 |  |
+| IO5 | D1 | 24 |  |
+| IO4 | D2 | 16 |  |
+| IO0 | D3 | 15 |  |
+| IO2 | D4 | 14 |  |
+| IO14 | D5 | 9 |  |
+| IO12 | D6 | 10 |  |
+| IO13 | D7 | 12 |  |
+| IO15 | D8 | 13 |  |
+| IO3 | RX | 25 |  |
+| IO1 | TX | 26 |  |
+| ADC0 | A0 | 6 |  |

IO	Arduino	芯片引脚号
IO16	D0	8
IO5	D1	24
IO4	D2	16
IO0	D3	15
IO2	D4	14
IO14	D5	9
IO12	D6	10
IO13	D7	12
IO15	D8	13
IO3	RX	25
IO1	TX	26
ADC0	A0	6