finally i did it : two esp8266 communication
Posted: Mon Oct 17, 2016 4:38 pmi want to thank every member who guided me to solve my problem
here is the result:
i wanted to make two esp8266 communication
each one can send data to the other at any time
each esp acts as a client and a server at the same time
here is the code for the first esp:
here is the code for the second esp:
here is the result:
i wanted to make two esp8266 communication
each one can send data to the other at any time
each esp acts as a client and a server at the same time
here is the code for the first esp:
Code: Select all
#include <ESP8266WiFi.h>
const char *ssid = "ESPap";
boolean toggle_pin5=0;
boolean toggle_pin4=0;
IPAddress host(192,168,4,2);
const int httpPort = 81;
unsigned long currentMillis;
unsigned long previousMillis=0;
boolean ledstate=0;
WiFiServer server(80);
WiFiClient client1;
String req="";
void setup() {
pinMode(5, OUTPUT);
pinMode(4, OUTPUT);
pinMode(14, INPUT_PULLUP);
pinMode(12, INPUT_PULLUP);
Serial.begin(115200);
delay(10);
Serial.print("Configuring access point...");
WiFi.mode(WIFI_AP);
boolean result = WiFi.softAP(ssid);
if(result == true) Serial.println("Ready");
else Serial.println("Failed!");
IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);
server.begin();
Serial.println("HTTP server started");
}
//========================================================================================================
void loop() {
WiFiClient client2 = server.available(); // Check if a client has connected
currentMillis= millis();
if((currentMillis-previousMillis)>50) { ledstate ^=1; previousMillis=currentMillis; }
if(digitalRead(14)==LOW){
digitalWrite(5,LOW);
digitalWrite(4,LOW);
toggle_pin5=0;
toggle_pin4=0;
}
if(digitalRead(12)==LOW){
client1.connect(host, httpPort);
client1.print("pilotc\r\n");
Serial.println("pilotc");
delay(250);
}
// Read the first line of HTTP request
if(client2.connected()){
req = client2.readStringUntil('\r');
Serial.println(req);
}
if(req=="pin5") {
client2.print("ok pin5\r\n");
client2.stop();
toggle_pin5=1;
req="";
}
if(toggle_pin5){digitalWrite(5, ledstate);}
if(req=="pin4") {
client2.print("ok pin4\r\n");
client2.stop();
toggle_pin4=1;
req="";
}
if(toggle_pin4) {digitalWrite(4, ledstate);}
}here is the code for the second esp:
Code: Select all
#include <ESP8266WiFi.h>
const char* ssid = "ESPap";
IPAddress host(192,168,4,1);
const int httpPort = 80;
String req="";
WiFiServer server(81);
WiFiClient client1;
void setup() {
pinMode(5,INPUT_PULLUP);
pinMode(4,INPUT_PULLUP);
pinMode(12, OUTPUT);
digitalWrite(12,HIGH);
Serial.begin(115200);
delay(10);
Serial.println("");
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
Serial.println("HTTP server started");
while(!client1.connect(host, httpPort)){
Serial.println("coonection failed");
delay(50);
}
Serial.println("connection successed");
}
//===========================================================================================================
void loop() {
WiFiClient client2 = server.available(); // Check if a client has connected
if(WiFi.status() != WL_CONNECTED){
Serial.println("reconnecting");
WiFi.begin(ssid);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
}
if(digitalRead(5)==LOW){
client1.connect(host, httpPort);
client1.print("pin5\r\n");
Serial.println("pin5 is on");
delay(250);
}
if(digitalRead(4)==LOW){
client1.connect(host, httpPort);
client1.print("pin4\r\n");
Serial.println("pin4 is on");
delay(250);
}
if(client1.available()){
String line = client2.readStringUntil('\r');
Serial.println(line);
if(line=="ok pin5"||line=="ok pin4") {Serial.println("order done");}
}
//here is the code as a server
if(client2.connected()){
req = client2.readStringUntil('\r');
Serial.println(req);
if(req=="pin12")digitalWrite(12,LOW);
}
}