掌控WIFI--AP模式下遥控小车
之前有写过掌控下连接已有的wifi，分配到一个ip地址，制作网页控制灯的点亮。这次尝试利用掌控的WIFI--AP模式（“接入点”或“热点”），摆脱局域网的束缚。外加另一个帖子提到的控制舵机，结合喵家的360舵机，iobit扩展板，能量模块的18650电池仓，搭了个小车，手机连接掌控的AP热点，浏览器登录分配的ip，通过设置好的网页按钮控制小车运动。
代码如下：
import socket
import network
from mpython import *
ap = network.WLAN(network.AP_IF)
ap.config(essid = 'ZK_demo')
ap.active(True)
CONTENT = """<!DOCTYPE HTML>
<html>
<head><meta charset = "utf-8">
<title>ZK-CAR</title>
</head>
<body>
<h1>掌控小车控制</h1>
<p><a href="/?car=go"><button class="button">GO</button></a></p>
<p><a href="/?car=stop"><button class="button button2">STOP</button></a></p>
<p><a href="/?car=back"><button class="button">BACK</button></a></p>
</body>
</html>
"""
addr = socket.getaddrinfo(ap.ifconfig(), 80)[-1]
s = socket.socket()
s.bind(addr)
s.listen(1)
oled.fill(0)
oled.DispChar('Connect on', 0, 0)
oled.DispChar(str(addr), 0, 16)
oled.show()
while True:
conn, addr = s.accept()
print('Connection from %s' %str(addr))
request = conn.recv(1024)
request = str(request)
print('Content = %s' %request)
car_go = request.find('/?car=go')
car_stop = request.find('/?car=stop')
car_back = request.find('/?car=back')
servo_1 = PWM(Pin(Pin.P1), freq=50)
servo_2 = PWM(Pin(Pin.P8), freq=50)
if car_go == 6:
print('GO')
servo_1.duty(int(0.5/20*1023))
servo_2.duty(int(2.5/20*1023))
if car_stop == 6:
print('STOP')
servo_1.duty(int(1.5/20*1023))
servo_2.duty(int(1.5/20*1023))
if car_back == 6:
print('BACK')
servo_1.duty(int(2.5/20*1023))
servo_2.duty(int(0.5/20*1023))
conn.send(CONTENT)
conn.close()
效果如下：
手机WIFI连接掌控板提供的名为"ZK_demo"的无线。浏览器登录"192.168.4.1"，就会出来如上图所示的掌控小车控制界面。通过三个按钮来实现小车的前进、停止、后退
手指甲要剪了{:5_121:} 优秀啊。{:5_128:}
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