我正在尝试将Wemos D1迷你ESP8266开发板连接到一体，以便将按钮状态发送到一体。
首先，我开发了Wemos D1 mini的代码，并使用UDP终端进行了检查，并且工作正常，我将消息从终端发送到Wemos板，并在串行监视器上显示该消息。
我正在发回带有按钮状态的消息，并且该消息显示在UDP终端上。
然后我在Unity上编写了此代码，并将其附加到主摄像头，我收到了Wemos D1 mini上unity发送的消息，但我看不到Wemos正在发送的消息。我注意到Socket.Available始终为0。
除了我不阅读返回消息的事实之外，有时Unity也会崩溃（运行时有时实际上并不经常发生）。这是来自Arduino IDE的代码：
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
//SSID of your network
char ssid[] = "TUI"; //SSID of your Wi-Fi router
char pass[] = "password"; //Password of your Wi-Fi router
int keyIndex = 0;
unsigned int localPort = 4000;
char packetBuffer[255]; //buffer to hold incoming packet
char ReplyBuffer[] = ""; // a string to send back
WiFiUDP Udp;
//input
const int buttonPin = 4;
const int ledpin = 5;
int buttonState = LOW;
void setup()
{
pinMode(buttonPin, INPUT);
pinMode(ledpin, OUTPUT);
IPAddress ip(192, 175, 0, 20);
IPAddress gateway(192, 175, 0, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress DNS(192, 175, 0, 1);
Serial.begin(115200);
WiFi.config(ip, gateway, subnet, DNS);
delay(100);
//WiFi.mode(WIFI_STA);
WiFi.begin(ssid, pass);
Serial.print("Connecting");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(200);
}
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println();
Serial.println("Fail connecting");
delay(5000);
ESP.restart();
}
Serial.print(" OK ");
Serial.print("Module IP: ");
Serial.println(WiFi.localIP());
printWifiStatus();
// if you get a connection, report back via serial:
Udp.begin(localPort);
}
void loop () {// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if (packetSize) {
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remoteIp = Udp.remoteIP();
Serial.print(remoteIp);
Serial.print(", port ");
Serial.println(Udp.remotePort());
// read the packet into packetBufffer
int len = Udp.read(packetBuffer, 255);
if (len > 0) {
packetBuffer[len] = 0;
}
Serial.println("Contents:");
Serial.println(packetBuffer);
String str(packetBuffer);
if(str == "hello from unity"){
digitalWrite(ledpin, HIGH);
}
buttonState = digitalRead(buttonPin);
if(buttonState == HIGH){
String str1 = "Button1 pressed";
str1.toCharArray(ReplyBuffer, 50);
}
else{
String str1 = "Button1 off";
str1.toCharArray(ReplyBuffer, 50);
}
Serial.println(ReplyBuffer);
Serial.println(Udp.remoteIP());
Serial.println(Udp.remotePort());
// send a reply, to the IP address and port that sent the packet
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
}
else{
digitalWrite(ledpin, LOW);
}
delay(10);
}
这是Unity上的脚本：
using UnityEngine;
using System.Net.Sockets;
using System.Text;
using System.Net;
using System;
public class ArduinoConnectUDP : MonoBehaviour
{
private void Update()
{
udpSend();
}
//Port and IP Data for Socket Client
void udpSend()
{
var IP = IPAddress.Parse("192.175.0.20");
int port = 4000;
var udpClient1 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
var sendEndPoint = new IPEndPoint(IP, port);
var receiveEndPoint = new IPEndPoint(IPAddress.Any, port);
var clientReturn = new UdpClient(4000);
try
{
//Sends a message to the host to which you have connected.
byte[] sendBytes = Encoding.ASCII.GetBytes("hello from unity");
udpClient1.SendTo(sendBytes, sendEndPoint);
Debug.Log(udpClient1.Available);
if (udpClient1.Available > 0)
{
// Blocks until a message returns on this socket from a remote host.
byte[] receiveBytes = clientReturn.Receive(ref receiveEndPoint);
string returnData = Encoding.ASCII.GetString(receiveBytes);
Debug.Log("Message Received: " +
returnData.ToString());
if (receiveBytes == null || receiveBytes.Length == 0)
{
Debug.Log("No Answer from Wemos");
}
}
udpClient1.Close();
clientReturn.Close();
}
catch (Exception e)
{
Debug.Log(e.ToString());
}
}
}
答案 0 :(得分：0)
解决了！必须更改c＃中的接收代码并更新arduino代码才能发送到端口4001（因为我是在接收随机端口上发送的，所以是静态端口）。
Unity代码：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using UnityEngine;
public class esp8266Connection : MonoBehaviour {
Thread m_Thread;
UdpClient m_Client;
void Start()
{
m_Thread = new Thread(new ThreadStart(ReceiveData));
m_Thread.IsBackground = true;
m_Thread.Start();
}
private void Update()
{
udpSend();
}
void ReceiveData()
{
try
{
m_Client = new UdpClient(4001);
m_Client.EnableBroadcast = true;
while (true)
{
IPEndPoint hostIP = new IPEndPoint(IPAddress.Any, 0);
byte[] data = m_Client.Receive(ref hostIP);
string returnData = Encoding.ASCII.GetString(data);
Debug.Log(returnData);
}
}
catch (Exception e)
{
Debug.Log(e);
OnApplicationQuit();
}
}
private void OnApplicationQuit()
{
if (m_Thread != null)
{
m_Thread.Abort();
}
if (m_Client != null)
{
m_Client.Close();
}
}
void udpSend()
{
var IP = IPAddress.Parse("192.175.0.20");
int port = 4000;
var udpClient1 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
var sendEndPoint = new IPEndPoint(IP, port);
try
{
//Sends a message to the host to which you have connected.
byte[] sendBytes = Encoding.ASCII.GetBytes("hello from unity");
udpClient1.SendTo(sendBytes, sendEndPoint);
}
catch (Exception e)
{
Debug.Log(e.ToString());
}
}
}
arduino的代码：
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
//SSID of your network
char ssid[] = "TUI"; //SSID of your Wi-Fi router
char pass[] = "password"; //Password of your Wi-Fi router
int keyIndex = 0;
unsigned int localPort = 4000;
char packetBuffer[255]; //buffer to hold incoming packet
char ReplyBuffer[] = ""; // a string to send back
WiFiUDP Udp;
//input
const int buttonPin = 4;
const int ledpin = D1;
int buttonState = LOW;
void setup()
{
pinMode(buttonPin, INPUT);
pinMode(ledpin, OUTPUT);
IPAddress ip(192, 175, 0, 20);
IPAddress gateway(192, 175, 0, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress DNS(192, 175, 0, 1);
Serial.begin(115200);
WiFi.config(ip, gateway, subnet, DNS);
delay(100);
//WiFi.mode(WIFI_STA);
WiFi.begin(ssid, pass);
Serial.print("Connecting");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(200);
}
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println();
Serial.println("Fail connecting");
delay(5000);
ESP.restart();
}
Serial.print(" OK ");
Serial.print("Module IP: ");
Serial.println(WiFi.localIP());
printWifiStatus();
// if you get a connection, report back via serial:
Udp.begin(localPort);
}
void loop () {// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if (packetSize) {
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remoteIp = Udp.remoteIP();
Serial.print(remoteIp);
Serial.print(", port ");
Serial.println(Udp.remotePort());
// read the packet into packetBufffer
int len = Udp.read(packetBuffer, 255);
if (len > 0) {
packetBuffer[len] = 0;
}
Serial.println("Contents:");
Serial.println(packetBuffer);
String str(packetBuffer);
if(str == "hello from unity"){
digitalWrite(ledpin, HIGH);
}
buttonState = digitalRead(buttonPin);
if(buttonState == HIGH){
String str1 = "Button1 pressed";
str1.toCharArray(ReplyBuffer, 50);
}
else{
String str1 = "Button1 off";
str1.toCharArray(ReplyBuffer, 50);
}
Serial.println(ReplyBuffer);
Serial.println(Udp.remoteIP());
Serial.println(Udp.remotePort());
// send a reply, to the IP address and port that sent the packet
Udp.beginPacket(Udp.remoteIP(), 4001);
Udp.write(ReplyBuffer);
Udp.endPacket();
}
else{
digitalWrite(ledpin, LOW);
}
delay(10);
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}