【Banana PI Leaf S3开发板试用体验】DAYU200——TCP控制三色灯

前面用webSocket控制灯，今天用tcp建立server来接收大DAYU200发送的TCP命令来控制LED灯的开关：
1、DAYU200的开发详见：【新提醒】【润和软件DAYU200开发板体验】TCP控制Hi3861 - OpenHarmony论坛 - 电子威廉希尔官方网站 论坛 - 广受欢迎的专业电子论坛! (elecfans.com)
2、Banana PI开发，用micropython建立tcpserver。接收到数据后判断命令是否为开关三色灯，然后做出相应的动作：

if data == 'LEDON':
      np[0] = (25,25,25) #三色相同即亮白光
      np.write() #输出显示
elif data == 'LEDOFF':
      np[0] = (0,0,0) #关灯
      np.write() #输出显示

整体代码如下：

#ESP32运行相关代码
import network
import socket
import time
from machine import Pin
from neopixel import NeoPixel
pin_48 = Pin(48) #BPI-Leaf-S3 板载的一颗 NeoPixel LED 在 GPIO48 上
np = NeoPixel(pin_48, 1,bpp=3, timing=1)# 初始化NeoPixel

SSID="SSID" #这里选择需要连的wifi名称
PASSWORD="pwd" #密码
port=3861
wlan=None
listenSocket=None

def connectWifi(ssid,passwd):
  global wlan
  wlan=network.WLAN(network.STA_IF)         #create a wlan object
  wlan.active(True)                         #Activate the network interface
  wlan.disconnect()                         #Disconnect the last connected WiFi
  wlan.connect(ssid,passwd)                 #connect wifi
  while(wlan.ifconfig()[0]=='0.0.0.0'):
    time.sleep(1)
  return True

#Catch exceptions,stop program if interrupted accidentally in the 'try'
try:
  connectWifi(SSID,PASSWORD)
  ip=wlan.ifconfig()[0]                     #get ip addr
  listenSocket = socket.socket()            #create socket
  listenSocket.bind((ip,port))              #bind ip and port
  listenSocket.listen(1)                    #listen message
  listenSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)    #Set the value of the given socket option
  print ('tcp waiting...')

  while True:
    print("accepting.....")
    conn,addr = listenSocket.accept()       #Accept a connection,conn is a new socket object
    print(addr,"connected")

    while True:
      data = conn.recv(1024)               #Receive 1024 byte of data from the socket
      if(len(data) == 0):
        print("close socket")
        conn.close()                        #if there is no data,close
        break
      print(data)
      data = data.decode()
      print(type(data))
      print(data)
      if data == 'LEDON':
          
          np[0] = (25,25,25) #三色相同即亮白光
          np.write() #输出显示
      elif data == 'LEDOFF':
          np[0] = (0,0,0) #三色相同即亮白光
          np.write() #输出显示
      ret = conn.send(data)                 #send data
except:
  if(listenSocket):
    listenSocket.close()
  wlan.disconnect()
  wlan.active(False)

下载后运行。详见底部视频。