普通2.4g遥控车改4g遥控车资料-8266
背景：传统遥控器都是航模为代表的2.4G遥控器，它们在室外且无障碍物时遥控距离很长，可达几千米，但是有障碍物时，遥控距离可能仅有10多米。市面上也有一些2.4g遥控改装4G的，是读取2.4g遥控信号，并转发至服务器，但是价格昂贵，几百到几千块！而且也没有开源的一体4g遥控器。
本次设计的这款遥控为4G遥控，只要有4G网络的地方，就能完美控制，延迟100ms左右。拥有它以后，你就能在家开着小车出去探险、出去买菜、取快递……本期从车架到遥控，都能白嫖立创！成本不过百元！
2.4g接收器所连8266
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
// 设置wifi接入信息(要连接的wifi)
const char* ssid = "WIFI";
const char* password = "密码";
String topicString = "lmwmm_car";//输入自己的通信暗号，能保证别人不和你重复就行
const char* mqttServer = "43.136.64.172";//test.ranye-iot.net(MQTT服务器域名或地址)
int port=1883;//MQTT服务器端口
int LeTest=0;//改成1则可观察串口数据，方便调试（平时不建议开启，会占用运行性能）
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);
void setup() {
Serial.begin(115200);
Serial.println("初始化成功!");
pinMode(D1, INPUT);
pinMode(D2, INPUT);
pinMode(D3, INPUT);
pinMode(D4, INPUT);
pinMode(D5, INPUT);
pinMode(D6, INPUT);
pinMode(D7, INPUT);
pinMode(D8, INPUT);
WiFi.mode(WIFI_STA); //设置ESP8266工作模式为无线终端模式
connectWifi();// 连接WiFi
mqttClient.setServer(mqttServer, port); // 设置MQTT服务器和端口号
connectMQTTServer(); // 连接MQTT服务器
}
void loop() {
if (mqttClient.connected()) { // 如果开发板成功连接服务器
pubMQTTmsg();
mqttClient.loop(); // 保持客户端心跳
} else { // 如果开发板未能成功连接服务器
connectMQTTServer(); // 则尝试连接服务器
}
delay(10);
}
void connectMQTTServer(){
// 根据ESP32的MAC地址生成客户端ID（避免与其它ESP32的客户端ID重名）
String clientId = "esp32-" + WiFi.macAddress();
// 连接MQTT服务器
if (mqttClient.connect(clientId.c_str())) {
Serial.println("MQTT Server Connected.");
Serial.println("Server Address: ");
Serial.println(mqttServer);
Serial.println("ClientId:");
Serial.println(clientId);
} else {
Serial.print("MQTT Server Connect Failed. Client State:");
Serial.println(mqttClient.state());
delay(3000);
}
}
int CH1,CH2,CH3,CH4,CH5,CH6,CH7,CH8;
void pubMQTTmsg(){
static int value; // 客户端发布信息用数字
char publishTopic[topicString.length() + 1]; // 这么做是为确保不同用户进行MQTT信息发布时，ESP8266客户端名称各不相同，
strcpy(publishTopic, topicString.c_str());
CH1 = pulseIn(D1,HIGH);
CH2 = pulseIn(D2,HIGH);
CH3 = pulseIn(D3,HIGH);
CH4 = pulseIn(D4,HIGH);
CH5 = pulseIn(D5,HIGH);
CH6 = pulseIn(D6,HIGH);
CH7 = pulseIn(D7,HIGH);
CH8 = pulseIn(D8,HIGH);//读取通道信息
// 建立发布信息。信息内容以Hello World为起始，后面添加发布次数。
String messageString = "A"+String(CH1)+"B"+String(CH2)+"C"+String(CH3)+"D"+String(CH4)+"E"+String(CH5)+"F"+String(CH6)+"G"+String(CH7)+"H"+String(CH8)+"I";
char publishMsg[messageString.length() + 1];
strcpy(publishMsg, messageString.c_str());
// 实现ESP32向主题发布信息
if(mqttClient.publish(publishTopic, publishMsg)){
if(LeTest==1)
{Serial.println(publishMsg);}
} else {
Serial.println("Message Publish Failed.");
}
}
void connectWifi(){
WiFi.begin(ssid, password);
//等待WiFi连接,成功连接后输出成功信息
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi Connected!");
Serial.println("");
}电调、舵机所连8266
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <Servo.h>
#include <Ticker.h>
Ticker ticker;
Servo CH1,CH2,CH3,CH4,CH5,CH6,CH7,CH8;
//双摇杆舵机+L298N+8266开发板
// 设置wifi接入信息(根据小车要连接的WiFi信息进行修改)
const char* ssid = "WIFI热点";
const char* password = "密码";
String topicString = "lmwmm_car";//与另一份代码中的该部分相同
const char* mqttServer = "43.136.64.172";//test.ranye-iot.net(MQTT服务器域名或地址)
int port=1883;//MQTT服务器端口
int LeTest=0;//改成1则可观察串口数据，方便调试（平时不建议开启，会占用运行性能）
int Ym,Fx,LeCar,Ym1,Fx1;
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);
void setup() {
Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT); //设置内置LED引脚为输出模式以便控制LED// 启动串口通讯（波特率为9600，波特率可以理解为串口传输数据的速度）
digitalWrite(LED_BUILTIN,LOW);
CH1.attach(D1,1000,2000);
CH2.attach(D2,1000,2000);
CH3.attach(D3,1000,2000);
CH4.attach(D4,1000,2000);
CH5.attach(D5,1000,2000);
CH6.attach(D6,1000,2000);
CH7.attach(D7,1000,2000);
CH8.attach(D8,1000,2000);
WiFi.mode(WIFI_STA); //设置ESP8266工作模式为无线终端模式(8266像手机一样连接到wifi的模式)
connectWifi(); // 连接WiFi
mqttClient.setServer(mqttServer, port);// 设置MQTT服务器和端口号
mqttClient.setCallback(receiveCallback);// 设置MQTT订阅回调函数
connectMQTTserver();// 连接MQTT服务器
ticker.attach(0.1, touch);//0.1秒数据延迟
}
void connectMQTTserver() {
String clientId = "esp8266-" + WiFi.macAddress();
if (mqttClient.connect(clientId.c_str())) {
Serial.println("MQTT Server Connected.");
Serial.println("Server Address:");
Serial.println(mqttServer);
Serial.println("ClientId: ");
Serial.println(clientId);
subscribeTopic(); // 订阅指定主题
} else {
Serial.print("MQTT Server Connect Failed. Client State:");
Serial.println(mqttClient.state());
delay(3000);
}
}
// 收到信息后的回调函数
int CH11,CH22,CH33,CH44,CH55,CH66,CH77,CH88;
char CH01[5],CH02[5],CH03[5],CH04[5],CH05[5],CH06[5],CH07[5],CH08[5];//储存接受到的通道数据
int Alocation,Blocation,Clocation,Dlocation,Elocation,Flocation,Glocation,Hlocation,Ilocation;
void receiveCallback(char* topic, byte* payload, unsigned int length) {
if(LeTest==1)
{for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
if(i==length-1)
{Serial.println("");}
}
}
else
{ if((char)payload[0]=='A')//检测8266②号是否联网
{
LeCar=1;
int j=0;
for ( int i = 1; i < 6; i++)
{if ((char)payload[i]!='B')
{CH01[j]=(char)payload[i];
j+=1;}
else
{Blocation=i,j=0;
break;}}//寻找CH1数据
for (int i = Blocation+1; i < length; i++)
{if ((char)payload[i]!='C')
{CH02[j]=(char)payload[i];
j+=1;}
else
{Clocation=i,j=0;
break;}}//寻找CH2数据
for (int i = Clocation+1; i < length; i++)
{if ((char)payload[i]!='D')
{CH03[j]=(char)payload[i];
j+=1;}
else
{Dlocation=i,j=0;
break;}}//寻找CH3数据
for (int i = Dlocation+1; i < length; i++)
{if ((char)payload[i]!='E')
{CH04[j]=(char)payload[i];
j+=1;}
else
{Elocation=i,j=0;
break;}}//寻找CH4数据
for (int i = Elocation+1; i < length; i++)
{if ((char)payload[i]!='F')
{CH05[j]=(char)payload[i];
j+=1;}
else
{Flocation=i,j=0;
break;}}//寻找CH5数据
for (int i = Flocation+1; i < length; i++)
{if ((char)payload[i]!='G')
{CH06[j]=(char)payload[i];
j+=1;}
else
{Glocation=i,j=0;
break;}}//寻找CH6数据
for (int i = Glocation+1; i < length; i++)
{if ((char)payload[i]!='H')
{CH07[j]=(char)payload[i];
j+=1;}
else
{Hlocation=i,j=0;
break;}}//寻找CH7数据
for (int i = Hlocation+1; i < length; i++)
{if ((char)payload[i]!='I')
{CH08[j]=(char)payload[i];
j+=1;}
else
{Ilocation=i,j=0;
break;}}//寻找CH8数据
CH11=String(CH01).toInt();
CH22=String(CH02).toInt();
CH33=String(CH03).toInt();
CH44=String(CH04).toInt();
CH55=String(CH05).toInt();
CH66=String(CH06).toInt();
CH77=String(CH07).toInt();
CH88=String(CH08).toInt();
for (int i = 0; i < 5; i++)
{CH01[i]='\0';CH02[i]='\0';CH03[i]='\0';CH04[i]='\0';
CH05[i]='\0';CH06[i]='\0';CH07[i]='\0';CH08[i]='\0';}//重置通道临时数据
}
else LeCar=0;}
}
void touch(){
if(LeCar==1)
{
CH1.write(CH11);CH2.write(CH22);CH3.write(CH33);CH4.write(CH44);
CH5.write(CH55);CH6.write(CH66);CH7.write(CH77);CH8.write(CH88);
}
}
void subscribeTopic() {
char subTopic[topicString.length() + 1];
strcpy(subTopic, topicString.c_str());
if (mqttClient.subscribe(subTopic)) {
Serial.println("Subscrib Topic:");
Serial.println(subTopic);
} else {
Serial.print("Subscribe Fail...");
}
}
void connectWifi() {
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
digitalWrite(LED_BUILTIN,LOW);
delay(500);
digitalWrite(LED_BUILTIN,HIGH);
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi Connected!");
Serial.println("");
digitalWrite(LED_BUILTIN,HIGH);
}
void loop() {
if (mqttClient.connected()) { // 如果开发板成功连接服务器
mqttClient.loop(); // 处理信息以及心跳
} else { // 如果开发板未能成功连接服务器
connectMQTTserver(); // 则尝试连接服务器
}
}
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