嵌入式实训day6

1、

from machine import Pin
from neopixel import NeoPixel
import timeif __name__=="__main__"#创建RBG灯带控制对象，包含5个像素(5个RGB LED)rgb_led = NeoPixel(Pin(4,Pin.OUT)，5)#定义RGB颜色RED=(255，0，0)GREEN(0,255,0)BLUE =(0，0，255)YELLOW=(255，150，0)WHITE=(255，255，255)# 白色BLACK=(0，0，0)#黑色(不亮)COLORS =(RED,GREEN,BLUE,YELLOW,WHITE,BLACK)for color in COLORS:#逐一点亮每个RGB LEDfor i in range(5):rgb_led[i]=(color[0], color[1], color[2])rgb_led.write()time.sleep_ms(200)time.sleep_ms(300)

2、

from machine import Pin
import time
import tm1637
if __name__=="__main__":# 定义数码管控制对象display =tm1637.TM1637(clk=Pin(16),dio=Pin(17))# 显示小数display.numbers(13,14)# 13.14time.sleep(2)#显示十六进制display.hex(100)#0x64time.sleep(2)#亮度调节display.brightness(0)time.sleep(2)display.brightness(7)time.sleep(2)#显示温度值display.temperature(26)time.sleep(2)display.temperature(-10)#低温报警:Lotime.sleep(2)display.temperature(100)#高温报警:Hitime.sleep(2)#显示字符串display.show("ABCD")time.sleep(2)#字符串滚动显示display.scroll("18712345678",500)#倒计时10秒num = 10while num >=0:display.number(num)num -= 1time.sleep(1)

3、

import ds18x20
import onewire
from machine import Pin
from machine import Timer
import sys#创建单总线驱动对象
ow= onewire.OneWire(Pin(4))
#定义DS18B20控制对象
ds18b20=ds18x20.DS18X20(ow)
#扫描设备，获取64位序列码，返回结果保存列表中
roms =ds18b20.scan()
if not roms:print("没有扫描到DS18B20设备,请检查硬件连接!")sys.exit()
else:print("扫描到DS18B20设备，序列码是:",roms)#定时器回调函数#
def get_temp(timer0):ds18b20.convert_temp()for rom in roms:temp= ds18b20.read_temp(rom)print("Ds18B20的温度是:%.2f℃"% temp)if __name__=="__main__":timer0 =Timer(0)timer0.init(mode=Timer.PERIODIC, period=1000,callback=get_temp)while True:pass

4、

from machine import Pin
import network
import timeled1=Pin(15,Pin.OUT,value=1)#准备手机热点
ssid="yishen"
password="20020618"def wifi_connect():#创建WLAN对象，STA模式wlan=network.WLAN(network.STA_IF)#激活WIFI模块wlan.active(True)#记录当前的时间用于WIFI连接的超时判定start_time=time.time()if not wlan.isconnected():#准备建立连接print(wlan.scan())wlan.connect(ssid,password)#等待连接让LED闪烁while not wlan.isconnected():led1.value(not led1.value())time.sleep_ms(300)#判定超时if time.time()-start_time>30:print("WIFI连接超时")return Falseelse:#已经连接成功led1.value(0)print("网络配置信息",wlan.ifconfig())return Trueif __name__=="__main__":wifi_connect()

5、

"""
通过socket编程实现一个简易的HTTP服务器
使用手机可以连接到服务器帮控制LED开关
测试：在手机的浏览器输入开发板的IP地址
"""
from machine import Pin
import network
import time
import socket
import sys# 定义LED控制对象，作为连接WIFI指示灯
led1 = Pin(15, Pin.OUT, value=1)# 准备手机热点
ssid = "yishen"
password = "20020618"def wifi_connect():# 创建WLAN对象，STA模式(ESP32开发板连接手机热点-AP)wlan = network.WLAN(network.STA_IF)# 激活WIFI模块wlan.active(True)# 记录当前时间，用于WIFI连接的超时判定start_time = time.time()if not wlan.isconnected():# 准备建立连接# print(wlan.scan())print("开始连接WIFI...")wlan.connect(ssid, password)# 等待连接让LED1闪烁while not wlan.isconnected():led1.value(not led1.value())time.sleep_ms(300)# 超时判定if time.time() - start_time > 30:print("WIFI连接超时!")return Falseelse:# 已经连接成功(如果之前连接过WIFI，上电后会自动连接)led1.value(0)print("网络配置信息", wlan.ifconfig()) # 重点关注IP地址return True# 网页数据
def web_page():# 获取开关灯的状态if led1.value() == 0:led_state = " "else:led_state = "checked"html = \
"""
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>HTTP</title><meta name="viewport" content="width=device-width, initial-scale=1"><style>body {font-family: Arial;text-align: center;margin: 0px auto;padding-top: 30px;}.switch {position: relative;display: inline-block;width: 120px;height: 68px}.switch input {display: none}.slider {position: absolute;top: 0;left: 0;right: 0;bottom: 0;background-color: #ccc;border-radius: 34px}.slider:before {position: absolute;content: "";height: 52px;width: 52px;left: 8px;bottom: 8px;background-color: #fff;-webkit-transition: .4s;transition: .4s;border-radius: 68px}input:checked+.slider {background-color: #2196F3}input:checked+.slider:before {-webkit-transform: translateX(52px);-ms-transform: translateX(52px);transform: translateX(52px)}</style><script>function toggleCheckbox(element) {var xhr = new XMLHttpRequest();if (element.checked) {xhr.open("GET", "/?led1=on", true);}else {xhr.open("GET", "/?led1=off", true);}xhr.send();}</script>
</head><body><h1>ESP32 LED</h1><label class="switch"><input type="checkbox" onchange="toggleCheckbox(this)" %s><span class="slider"></span></label>
</body></html>
""" % (led_state)return html    if __name__ == "__main__":# 连接WiFiwhile True:try:if wifi_connect():breakexcept Exception as ex:print("WIFI连接异常:", ex)time.sleep_ms(1000)print("WIFI连接成功!")try:# 创建HTTP通信的套接字（本质就是TCP通信）http_socket = socket.socket()# 设置地址重用选项http_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)# 绑定地址http_socket.bind(("0.0.0.0", 80))# 设置监听http_socket.listen()print("创建HTTP服务器成功")except Exception as ex:print("创建HTTP服务器失败:", ex)sys.exit()# 服务器一直运行while True:try:# 等待客户端连接,返回两个数据，分别是和客户端通信的套接字、客户端地址client, addr = http_socket.accept()print("客户端%s建立了连接" % str(addr))# 接收客户端请求数据request = client.recv(1024)request = str(request)print("收到客户端请求=%s" % request)# GET /?led1=off HTTP/1.1......# GET /?led1=on HTTP/1.1......if request.find("/?led1=on") == 6:led1.value(1)elif request.find("/?led1=off") == 6:led1.value(0)# 发送响应：给客户端返回数据client.send("HTTP/1.1 200 OK\n")  # 状态行client.send("Content-Type: text/html\n")  # 响应头client.send("Connection: close\n\n") # 响应头response = web_page() # 响应消息体client.write(response)  # 发送响应消息client.close() # 关闭本次通信except Exception as ex:print("HTTP通信异常:", ex)

6、

from machine import Pin
import network
import time
import socket
import onewire
import ds18x20#创建单总线驱动对象
ow= onewire.OneWire(Pin(4))
#定义DS18B20控制对象
ds18b20=ds18x20.DS18X20(ow)
#扫描设备，获取64位序列码，返回结果保存列表中# 初始化LED对象
led1 = Pin(15, Pin.OUT, value=1)roms =ds18b20.scan()#定时器回调函数#
def get_temp(timer0):ds18b20.convert_temp()for rom in roms:temp= ds18b20.read_temp(rom)print("Ds18B20的温度是:%.2f℃"% temp)# 准备手机热点
ssid = "yishen"
password = "20020618"def wifi_connect(ssid, password):wlan = network.WLAN(network.STA_IF)wlan.active(True)start_time = time.time()if not wlan.isconnected():print("连接到WiFi...")wlan.connect(ssid, password)while not wlan.isconnected():passprint("网络配置信息:", wlan.ifconfig())return wlan# 准备网页数据
def web_page(temp):html = """
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>DS18B20</title><style>html {font-family: Arial;display: inline-block;margin: 0px auto;text-align: center;}h2 {font-size: 3.0rem;}p {font-size: 3.0rem;}.units {font-size: 1.2rem;}.ds-labels {font-size: 1.5rem;vertical-align: middle;padding-bottom: 15px;}</style>
</head>
<body><h2>ESP32</h2><p><i class="fas fa-thermometer-half" style="color:#059e8a;"></i><span class="ds-labels">Temperature</span><span id="temperature">""" + "%0.1f" % temp + """</span><sup class="units">&deg;C</sup></p><p><i class="fas fa-thermometer-half" style="color:#059e8a;"></i><span class="ds-labels">Temperature</span><span id="temperature">""" + str(round(temp * (9 / 5) + 32.0, 1)) + """</span><sup class="units">&deg;F</sup></p>
</body>
</html>
"""return htmlif __name__ == '__main__':# 初始化WiFi连接wlan = wifi_connect(ssid, password)try:# 创建TCP套接字并绑定地址s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)s.bind(('0.0.0.0', 80))s.listen(5)print('HTTP服务器已启动.')while True:conn, addr = s.accept()print('客户端地址:', addr)request_data = conn.recv(1024)request_data = str(request_data)print('收到请求:', request_data)# 获取DS18B20传感器数据get_temp(None)  # 此处传入None，因为定时器回调函数不需要参数# 读取最新得到的温度数据temp = ds18b20.read_temp(roms[0])  # 假定只有一个DS18B20设备# 准备并发送网页响应response = web_page(temp)conn.send(b'HTTP/1.1 200 OK\n')conn.send(b'Content-Type: text/html\n')conn.send(b'Connection: close\n\n')conn.sendall(response)conn.close()except Exception as ex:print("HTTP服务器异常:", ex)