I have made a batch of wifi controlled switches called MakerSwitch Tail kit built-in with a high quality transformer HLK-PM01 from Hi-Link, a relay circuit, an ESP8266 D1 mini module and a plastic enclosure inspired from PowerSwitch Tail and Sonoff. It use GPIO16 to control the 10A relay in it, so the rated power is 1100W for 110VAC or 2200W for 220VAC. I have run the codes using both dynamic IP and static IP without fail.
Be careful, when re-entering the web page, the status may be wrong. Modify the example code to fit your need.
I have also developed the sketch built-in the kit for sale in Taiwan acting as MQTT client integrating MQTT protocol and ESP8266 SmartConfig.
Photos
Sketch for Dynamic IP
#include <ESP8266WiFi.h>
const char* ssid = "your-ssid"; // use ssid of your router
const char* password = "your-password"; // use password for your router
int ledPin = 16; // GPIO16
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Match the request
int value = LOW;
if (request.indexOf("/LED=ON") != -1) {
digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1) {
digitalWrite(ledPin, LOW);
value = LOW;
}
// Set ledPin according to the request
//digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Led pin is now: ");
if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("<br><br>");
// use text to control led or switch
// client.println("Click <a href=\"/LED=ON\">here</a> turn the LED on GPIO16 ON<br>");
// client.println("Click <a href=\"/LED=OFF\">here</a> turn the LED on GPIO16 OFF<br>");
// use button to control led or switch
client.println("<a href=\"/LED=ON\"><button>ON</button></a> <a href=\"/LED=OFF\"><button>OFF</button></a></p>");
client.println("</html>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
Sketch for Static IP
#include <ESP8266WiFi.h>
const char* ssid = "your-ssid"; // use ssid of your router
const char* password = "your-password"; // use password for your router
int ledPin = 16; // GPIO16
WiFiServer server(80);
IPAddress ip(192, 168, 1, 99); // the desired IP address
IPAddress gateway(192, 168, 1, 1); // set gateway to match your network
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
Serial.print(F("Setting static ip to : "));
Serial.println(ip);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
IPAddress subnet(255, 255, 255, 0); // set subnet mask to match your network
WiFi.config(ip, gateway, subnet);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
// Read the first line of the request
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
// Match the request
int value = LOW;
if (request.indexOf("/LED=ON") != -1) {
digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1) {
digitalWrite(ledPin, LOW);
value = LOW;
}
// Set ledPin according to the request
//digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.print("Led pin is now: ");
if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("<br><br>");
// use text to control led or switch
client.println("Click <a href=\"/LED=ON\">here</a> turn the LED on GPIO16 ON<br>");
client.println("Click <a href=\"/LED=OFF\">here</a> turn the LED on GPIO16 OFF<br>");
// use button to control led or switch
// client.println("<a href=\"/LED=ON\"><button>ON</button></a> <a href=\"/LED=OFF\"><button>OFF</button></a></p>");
client.println("</html>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
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