Communication between three node MCUs
Posted: Thu Sep 19, 2019 6:27 amI want to communicate between three node MCUs by using IPs. I was able to communicate between two nodemcus (one was in AP mode and the other in STA) using the same IP address without the web page.
Now, I'm having 3 nodemcus where the first one is in AP mode, second one in AP+STA mode and third in STA mode. I am able to establish a connection between the second and third nodemcu but not between the first and second.
I have attached a code for second nodemcu which is functioning in AP+STA mode. There may be errors in the code. Someone please help.
Thanks in advance.
Now, I'm having 3 nodemcus where the first one is in AP mode, second one in AP+STA mode and third in STA mode. I am able to establish a connection between the second and third nodemcu but not between the first and second.
I have attached a code for second nodemcu which is functioning in AP+STA mode. There may be errors in the code. Someone please help.
Thanks in advance.
Code: Select all
#include <ESP8266WiFi.h>
byte ledPin = 2;
char ssid[] = "Wemos_AP"; // SSID of your AP
char pass[] = "Wemos_comm"; // password of your AP
IPAddress server(192,168,4,15); // IP address of the AP
WiFiClient client;
void setup() {
Serial.begin(9600);
WiFi.mode(WIFI_AP_STA);
WiFi.begin(ssid, pass); // connects to the WiFi AP
Serial.println();
Serial.println("Connection to the AP");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println();
Serial.println("Connected");
Serial.println("station_bare_01.ino");
Serial.print("LocalIP:"); Serial.println(WiFi.localIP());
Serial.println("MAC:" + WiFi.macAddress());
Serial.print("Gateway:"); Serial.println(WiFi.gatewayIP());
Serial.print("AP MAC:"); Serial.println(WiFi.BSSIDstr());
pinMode(ledPin, OUTPUT);
}
void loop() {
client.connect(server, 80);
digitalWrite(ledPin, LOW);
Serial.println("********************************");
Serial.print("Byte sent to the AP: ");
Serial.println(client.print("From sta_ap\r"));
String answer = client.readStringUntil('\r');
Serial.println("From the AP: " + answer);
client.flush();
digitalWrite(ledPin, HIGH);
client.stop();
// delay(2000);
WiFiClient client1 = server.available();
if (!client1) {return;}
digitalWrite(ledPin, LOW);
String request = client1.readStringUntil('\r');
Serial.println("********************************");
Serial.println("From the station: " + request);
client1.flush();
Serial.print("Byte sent to the station: ");
Serial.println(client1.println(request + "ca" + "\r"));
digitalWrite(ledPin, HIGH);
}