也许这很容易解决，也许我搞砸了。我搞不清楚了。提前感谢您能给我的任何帮助！
所以，我有一个必须安装在漫游车（RC 爬虫）上的树莓派 2 b+。我决定使用 WebIOPi，但找不到任何有用的东西。
我的项目应该是这样工作的：HTML/JS -> PYTHON -> SERIAL TX -> ARDUINO 我已经拥有了我需要的一切，而且树莓派的 PWM 屏蔽在这里非常昂贵。
我设法在我的 HTML 上显示了两个滑块，并且 arduino 已准备好接收命令字符串。但介于两者之间的某个地方不起作用。
完整的代码在底部，这里只是一些片段：
<div class="slidecontainer">
<input type="range" min="1" max="179" value="90" class="slider" id="myRange" width="500"></div>
在这里，我有两个滑块之一。
<script>
var slider = document.getElementById("myRange");
var output = document.getElementById("steering");
var slider2 = document.getElementById("myRange2");
var output2 = document.getElementById("throttle");
var vs = slider.value;
var vt = slider2.value;
output.innerHTML = slider.value;
output2.innerHTML = slider2.value;
slider.oninput = function() {
steering.innerHTML = slider.value - 90;
webiopi().callMacro("new_steering",vs);
}
slider2.oninput = function() {
throttle.innerHTML = slider2.value - 90;
webiopi().callMacro("new_throttle",vt);
}
</script>
在这里，我运行一个脚本，该脚本将值写入 HTML 页面，格式为 -89 到 89 范围。我调用了一个名为 new_steering 的 WebIOPi 宏，传递值 vs（vs 应该是滑块的值，从 1 到 179）。
@webiopi.macro
def new_steering(nsv):
f = open("slog.txt", "a+")
f.write(nsv)
news_string = "S{}".format(nsv)
f.write(news_string)
serial.writeString(news_string)
f.close()
在 python 代码中，我有读取传入值的宏，将其写入文本文档（不工作也不需要，只是为了检查它是否接收到变量），它创建一个以 S 作为前导字符的字符串并尝试发送它槽串口
出了点问题。我不知道什么和有多糟糕。请帮忙！我的小脑袋正在沸腾。
我已经像这样设置了 WebIOPi：
[GPIO]
[~GPIO]
[SCRIPTS]
botler1 = /home/pi/botler1/python/interface.py
[HTTP]
enabled = true
port = 8786
passwd-file = /etc/webiopi/passwd
prompt = "BOTLER1_hello"
doc-root = /home/pi/botler1
welcome-file = index.html
#------------------------------------------------------------------------#
[COAP]
enabled = true
port = 5683
multicast = true
[DEVICES]
usb1 = Serial device:ttyACM0 baudrate:9600
[REST]
gpio-export = 17
gpio-post-value = true
gpio-post-function = false
[ROUTES]
这是 HTML-Web 界面
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>WebIOPi | Light Control</title>
<script type="text/javascript" src="/webiopi.js"></script>
<script type="text/javascript">
webiopi().ready(function() {
// Create a "Light" labeled button for GPIO 17
var button = webiopi().createGPIOButton(17, "Light");
// Append button to HTML element with ID="controls" using jQuery
$("#controls").append(button);
// Refresh GPIO buttons
// pass true to refresh repeatedly of false to refresh once
webiopi().refreshGPIO(true);
});
</script>
<style type="text/css">
button {
display: block;
margin: 5px 5px 5px 5px;
width: 160px;
height: 45px;
font-size: 24pt;
font-weight: bold;
color: white;
}
#gpio17.LOW {
background-color: Black;
}
#gpio17.HIGH {
background-color: Blue;
}
.slidecontainer {
width: 100%; /* Width of the outside container */
}
/* The slider itself */
.slider {
-webkit-appearance: none; /* Override default CSS styles */
appearance: none;
width: 100%; /* Full-width */
height: 25px; /* Specified height */
background: #d3d3d3; /* Grey background */
outline: none; /* Remove outline */
opacity: 0.7; /* Set transparency (for mouse-over effects on hover) */
-webkit-transition: .2s; /* 0.2 seconds transition on hover */
transition: opacity .2s;
}
</style>
</head>
<body>
<div class="slidecontainer">
<input type="range" min="1" max="179" value="90" class="slider" id="myRange" width="500"></div>
<div align="center"><p>Steering: <span id="steering"></span></p></div>
<div class="slidecontainer">
<input type="range" min="1" max="179" value="90" class="slider"
id="myRange2" width="500"></div>
<div align="center"><p>Throttle: <span id="throttle"></span></p></div>
</div>
<script>
var slider = document.getElementById("myRange");
var output = document.getElementById("steering");
var slider2 = document.getElementById("myRange2");
var output2 = document.getElementById("throttle");
var vs = slider.value;
var vt = slider2.value;
output.innerHTML = slider.value;
output2.innerHTML = slider2.value;
slider.oninput = function() {
steering.innerHTML = slider.value - 90;
webiopi().callMacro("new_steering",vs);
}
slider2.oninput = function() {
throttle.innerHTML = slider2.value - 90;
webiopi().callMacro("new_throttle",vt);
}
</script>
</body>
</html>
这是python文件
import webiopi
import datetime
GPIO = webiopi.GPIO
# setup function is automatically called at WebIOPi startup
def setup():
nosense = 1
# loop function is repeatedly called by WebIOPi
def loop():
# retrieve device named "serial" in the config
serial = webiopi.deviceInstance("usb1")
# write a string
#serial.writeString("some text")
webiopi.sleep(1)
@webiopi.macro
def new_steering(nsv):
f = open("slog.txt", "a+")
f.write(nsv)
news_string = "S{}".format(nsv)
f.write(news_string)
serial.writeString(news_string)
f.close()
@webiopi.macro
def new_throttle(ntv):
d = open("tlog.txt", "a+")
d.write(ntv)
newt_string = "T{}".format(ntv)
d.write(newt_string)
serial.writeString(newt_string)
d.close
def destroy():
nosense = 1