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User avatar
By barti5001
#51532 Hello,
I would like to send my data to databases with my esp8266. Firstly I create database with 3-column table with xampp in localhost, I want save date when the measurement was done,temperature and humidity. In other database I want save date when it was switched and state of device1,device2 etc.
How can I do that?
What should I add to my code?
I partly know MySQL and PHP, but I don't know how I can use them to this project.
It's my code, I can show temperature, humidity and switch on/switch off two leds.
Code: Select all#include <ESP8266WiFi.h>
#include "DHT.h"

#define DHTTYPE DHT22   // DHT 21 (AM2301)

// WiFi parameters
const char* ssid = "xxx";
const char* password = "xxx";

// Create an instance of the server
WiFiServer server(80);

// Pin
int device1pin = 5; //d1
int device2pin = 4; //d2
//DHT sensor
const int DHTPin = 14; //d5

// Initialize DHT sensor.
DHT dht(DHTPin, DHTTYPE);

void setup() {
 
  // Start Serial
  Serial.begin(115200);
  delay(10);
 
//DHT begin
  dht.begin();

  // Prepare GPIO5
  pinMode(device1pin, OUTPUT);
  pinMode(device2pin, OUTPUT);
  digitalWrite(device1pin, 0);
  digitalWrite(device2pin, 0);
 
  // 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.println(WiFi.localIP());
}

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);
  }

  float h = dht.readHumidity();
  float t = dht.readTemperature();
 
  // Read the first line of the request
  String req = client.readStringUntil('\r');
  Serial.println(req);
  client.flush();
 
  // Match the request
  if (req.indexOf("/on2") != -1) {
    digitalWrite(device2pin, 1);
  }
  else if (req.indexOf("/off2") != -1) {
    digitalWrite(device2pin, 0);
  }
  if (req.indexOf("/on1") != -1){
    digitalWrite(device1pin, 1);
  }
  else if (req.indexOf("/off1") != -1) {
    digitalWrite(device1pin, 0);
  }
 
    client.flush();

  // Prepare the response
  client.println( "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n");
  client.println( "<head>");
  client.println( "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
  client.println( "<script src=\"https://code.jquery.com/jquery-2.1.3.min.js\"></script>");
  client.println( "<link rel=\"stylesheet\" href=\"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css\">");
  client.println( "</head>");
  client.println( "<div class=\"container\">");
  client.println("<h1>Temperature: ");
  client.println(t);
  client.println( "</h1>");
  client.println( "<h1>Humidity: ");
  client.println(h);
  client.println("</h1>");

  String s = "<h1>Relay Control</h1>";
  s += "<div class=\"row\">";
  s += "<div class=\"col-md-2\"><input id=\"divinput1\" class=\"btn btn-block btn-lg btn-primary\" type=\"button\" value=\"On1\" onclick=\"on1()\"></div>";
  s += "<div class=\"col-md-2\"><input class=\"btn btn-block btn-lg btn-danger\" type=\"button\" value=\"Off1\" onclick=\"off1()\"></div>";
  s += "<div class='col-md-2'><div id='value1'>Brak inf</div></div>";
  s += "</div>";
  s += "<br />";
  s += "<div class=\"row\">";
  s += "<div class=\"col-md-2\"><input class=\"btn btn-block btn-lg btn-primary\" type=\"button\" value=\"On2\" onclick=\"on2()\"></div>";
  s += "<div class=\"col-md-2\"><input class=\"btn btn-block btn-lg btn-danger\" type=\"button\" value=\"Off2\" onclick=\"off2()\"></div>";
  s += "<div class=\"col-md-2\"><div id=\"value2\">Brak inf</div></div>";
  s += "</div></div>";
  s += "<script>function on1() {$.get('on1');$(\"#value1\").text(\"Device1 is on\");}</script>";
  s += "<script>function off1() {$.get(\"/off1\");$(\"#value1\").text(\"Device1 is off\");}</script>";
  s += "<script>function on2() {$.get('on2');$(\"#value2\").text(\"Device2 is on\");}</script>";
  s += "<script>function off2() {$.get(\"/off2\");$(\"#value2\").text(\"Device2 is off\");}</script>";
 
  client.print(s);

  delay(1);
 
  Serial.println("Client disconnected");

  // The client will actually be disconnected
  // when the function returns and 'client' object is detroyed
}


User avatar
By villTech
#51548 1. create php file that receive POST request and save it to mysql database.
2. have esp POST your variables to the php file you created
User avatar
By barti5001
#51581
villTech wrote:1. create php file that receive POST request and save it to mysql database.
2. have esp POST your variables to the php file you created


Thank you for your answer.
But how can I have post variables to the php file with esp8266 code? And where should I place this php file?
User avatar
By villTech
#51595 sample arduino esp POST request to server php file:
Code: Select all    h = dht.readHumidity();
    t = dht.readTemperature();

    String postStr = "humi=" + h + "&temp=" + t;
    client.print(String("POST ") + "/yourPHPfile.php HTTP/1.1\r\n" +
               "Host: <yorServerIP>\r\n" +
               "Content-Type: application/x-www-form-urlencoded\r\n" +
               "Connection: keep-alive\r\n" +
               "Content-Length: " + postStr.length() + "\r\n\r\n" + postStr);


barti5001 wrote: Firstly I create database with 3-column table with xampp in localhost.
i assumed you set up your xampp on a pc. then php should be and running in your pc.

you can use php date() function to get a timestamp every POST request