micropython(esp8266)adc采集通过tcp发送采集的数据

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
            break
        adcVal = 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 time

port = 10000  #端口号
listenSocket = None  #套接字

def do_connect():
    import network
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        wlan.connect('CQUPT', '')
        while not wlan.isconnected():
            pass
    print('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
            #break
        inVal = 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
            break
        if(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

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