How to send "PIN IS HIGH" from one ESP8266 to another?
Posted: Sun Dec 17, 2017 8:46 pmHI-
I've followed a great tutorial here:https://www.instructables.com/id/WiFi-Communication-Between-Two-ESP8266-Based-MCU-T/ to make 2 ESPs talk to each other through my home router. That code works.
ESP1 (client) is connected to 4 switches, I'd like for when the switches are on for ESP1, for that information to be sent to ESP2 (server).
When a switch is on on ESP1, it should turn on a motor on ESP2.
How can I do this? The switches are called val12, val13, val14, val16 on ESP1.
My code is below.
Thanks in advance!
I've followed a great tutorial here:https://www.instructables.com/id/WiFi-Communication-Between-Two-ESP8266-Based-MCU-T/ to make 2 ESPs talk to each other through my home router. That code works.
ESP1 (client) is connected to 4 switches, I'd like for when the switches are on for ESP1, for that information to be sent to ESP2 (server).
When a switch is on on ESP1, it should turn on a motor on ESP2.
How can I do this? The switches are called val12, val13, val14, val16 on ESP1.
My code is below.
Thanks in advance!
Code: Select all
#This is the client code for ESP1 which is connected to 4 switches
#include <SPI.h>
#include <ESP8266WiFi.h>
int val12;
int val13;
int val14;
int val15;
int val16;
byte ledPin = 2;
char ssid[] = "xxx"; // SSID of your home WiFi
char pass[] = "xxx"; // password of your home WiFi
unsigned long askTimer = 0;
IPAddress server(192,168,1,23); // the fix IP address of the server
WiFiClient client;
void setup() {
Serial.begin(115200); // only for debug
WiFi.begin(ssid, pass); // connects to the WiFi router
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
pinMode(0, OUTPUT);
pinMode(2, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(12, INPUT);
pinMode(13, INPUT);
pinMode(14, INPUT);
pinMode(16, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop () {
client.connect(server, 80); // Connection to the server
digitalWrite(2, LOW); // to show the communication only (inverted logic)
val12 = digitalRead(12); // read the input pin
val13 = digitalRead(13); // read the input pin
val14 = digitalRead(14); // read the input pin
val16 = digitalRead(16); // read the input pin
digitalWrite(0, val16);
Serial.println(".");
client.println("Hello server! Are you sleeping?\r"); // sends the message to the server
client.println(val16);
String answer = client.readStringUntil('\r'); // receives the answer from the server
Serial.println("from server: " + answer);
client.flush();
digitalWrite(ledPin, HIGH);
delay(2000); // client will trigger the communication after two seconds
}Code: Select all
#This is the server code which is connected to another ESP
#include <SPI.h>
#include <ESP8266WiFi.h>
int ledPin = 2;
char ssid[] = "xxx"; // SSID of your home WiFi
char pass[] = "xxx"; // password of your home WiFi
WiFiServer server(80);
IPAddress ip(192, 168, 1, 23); // IP address of the server
IPAddress gateway(192,168,1,1); // gateway of your network
IPAddress subnet(255,255,255,0); // subnet mask of your network
void setup() {
Serial.begin(115200); // only for debug
WiFi.config(ip, gateway, subnet); // forces to use the fix IP
WiFi.begin(ssid, pass); // connects to the WiFi router
Serial.println();
Serial.print("MAC: ");
Serial.println(WiFi.macAddress());
digitalWrite(ledPin, HIGH);
delay(1500);
digitalWrite(ledPin, LOW);
delay(1500);
digitalWrite(ledPin, HIGH);
delay(1500);
digitalWrite(ledPin, LOW);
delay(1500);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
server.begin(); // starts the server
pinMode(ledPin, OUTPUT);
}
void loop () {
WiFiClient client = server.available();
if (client) {
if (client.connected()) {
digitalWrite(ledPin, LOW); // to show the communication only (inverted logic)
Serial.println(".");
String request = client.readStringUntil('\r'); // receives the message from the client
Serial.print("From client: "); Serial.println(request);
client.flush();
client.println("Hi client! No, I am listening.\r"); // sends the answer to the client
digitalWrite(ledPin, HIGH);
}
client.stop(); // tarminates the connection with the client
}
}