引脚
A0为adc采集端。
tcp连接
ip:192.168.4.1 端口:9999
代码
import network, socket
from machine import ADC, Pin
import time
ip = '192.168.4.1'
port = 9999 #端口号ap = network.WLAN(network.AP_IF)
# create access-point interface
ap.config(essid='ESP-AP',password='12345678') # set the ESSID of the access point
ap.active(True) # activate the interface
while True:if(ap.isconnected() == True):time.sleep(4);print("connected!")break
adc = ADC(0)listenSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
addr = (ip, port)
listenSocket.bind(addr)
listenSocket.listen(5) #监听套接字, 最多允许一个连接
while True:print("accepting.....")conn, addr = listenSocket.accept() #接收连接请求，返回收发数据的套接字对象和客户端地址print(addr, "connected")while True:time.sleep(1)if(ap.isconnected() == False): #判断客户端是否断开连接print("close socket")conn.close() #关闭套接字breakadcVal = str(3.3/1024*adc.read())print('voltage is '+ adcVal +'v')ret = conn.send(adcVal + '\r\n') #发送数据
连接wifi产生tcp服务器
""" ESP32 TCP Server """import socket
import network
from machine import Pin
import timeport = 10000 #端口号
listenSocket = None #套接字def do_connect():import networkwlan = network.WLAN(network.STA_IF)wlan.active(True)if not wlan.isconnected():print('connecting to network...')wlan.connect('CQUPT', '')while not wlan.isconnected():passprint('network config:', wlan.ifconfig())return(wlan.ifconfig())
p2 = Pin(2, Pin.IN)
wifiinfo = do_connect()
ip = wifiinfo[0] #获取IP地址
listenSocket = socket.socket() #创建套接字
listenSocket.bind((ip, port)) #绑定地址和端口号
listenSocket.listen(1) #监听套接字, 最多允许一个连接
listenSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) #设置套接字
print ('tcp waiting...')while True:print("accepting.....")conn, addr = listenSocket.accept() #接收连接请求，返回收发数据的套接字对象和客户端地址print(addr, "connected")while True:time.sleep(1)#if(ap.isconnected() == False): #判断客户端是否断开连接#print("close socket")#conn.close() #关闭套接字#breakinVal = p2.value()print(inVal)ret = conn.send(str(inVal) + '\r\n') #发送数据
tcp服务器通过接受值控制舵机(主动断开)
import network, socket
from machine import ADC, Pin
from machine import Pin, PWM
import time
ip = '192.168.4.1'
port = 9999 #端口号ap = network.WLAN(network.AP_IF)
# create access-point interface
ap.config(essid='ESP-AP',password='12345678') # set the ESSID of the access point
ap.active(True) # activate the interface
pwm0 = PWM(Pin(2)) # create PWM object from a pin
pwm0.freq(50) # set frequency
pwm0.duty(200) # set duty cycle
pwm0.duty(int((2.5)/20*1023))
listenSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
addr = (ip, port)
listenSocket.bind(addr)
listenSocket.listen(1) #监听套接字
while True:print("accepting.....")conn, addr = listenSocket.accept() #接收连接请求，返回收发数据的套接字对象和客户端地址print(addr, "connected") while True: data = conn.recv(1024) #接收数据（1024字节大小）if(len(data) == 0): #判断客户端是否断开连接print("close socket")conn.close() #关闭套接字breakif(str(data) == "b'1'"):print(data)ret = conn.send(data) #发送数据pwm0.duty(int((1.3)/20*1023))time.sleep(5)pwm0.duty(int((2.5)/20*1023))conn.close() #关闭套接字break