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电脑开启tcp server

端口5678

小程序代码

handleTcp() {
    const tcp = wx.createTCPSocket()
    tcp.connect({
      address: '127.0.0.1',
      port: 5678
    })
    tcp.onConnect(() => {
      console.log("onConnect")
      tcp.write('hello, how are you')
    })
    tcp.onMessage((message, remoteInfo, localInfo) => {
      console.log("onMessage")
      console.log(message)
      console.log(remoteInfo)
      console.log(localInfo)
    })
    tcp.onError((res) => {
      console.log(res)
    })

    setTimeout(function () {
     // 3s后，关闭socket
      tcp.close(() => {
        console.log("close")
      })
    }, 3000)
  }

运行结果

服务端运行日志