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ESP8266 WiFi – HTTP GET request maken (ArduinoIDE)

Op deze pagina staat een voorbeeld om met de ESP module in Arduino code (c++) een GET request te maken naar een website.

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
 
// WiFi parameters to be configured
const char* ssid = "Pi_AP"; // Hoofdlettergevoelig
const char* password = "Raspberry"; // Hoofdlettergevoelig

const char* http_site = "http://jsonplaceholder.typicode.com/users";
const int http_port = 80;

void setup(void) { 
  Serial.begin(9600);
  Serial.print("Bezig met verbinden");
  WiFi.begin(ssid, password); // Connect to WiFi
 
  // while wifi not connected yet, print '.'
  // then after it connected, get out of the loop
  while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
  }
  
  // Verbonden.
  Serial.println("OK!");
  
  // Access Point (SSID).
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());
  
  // IP adres.
  Serial.print("IP: ");
  Serial.println(WiFi.localIP());

  // Signaalsterkte.
  long rssi = WiFi.RSSI();
  Serial.print("Signaal sterkte (RSSI): ");
  Serial.print(rssi);
  Serial.println(" dBm");
  Serial.println("");
}

void loop() {
 if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status
  
    HTTPClient http; //Declare an object of class HTTPClient
    http.begin("http://jsonplaceholder.typicode.com/users/1"); //Specify request destination
    int httpCode = http.GET(); //Send the request
    if (httpCode > 0) { //Check the returning code
      String payload = http.getString(); //Get the request response payload
      Serial.println(payload); //Print the response payload
    }
    http.end(); //Close connection
  } else {
    Serial.println("Error in WiFi connection");   
  }
  delay(30000); //Send a request every 30 seconds
}

#include <ESP8266WiFi.h>

#include <ESP8266HTTPClient.h>

// WiFi parameters to be configured

const char* ssid = "Pi_AP"; // Hoofdlettergevoelig

const char* password = "Raspberry"; // Hoofdlettergevoelig

const char* http_site = "http://jsonplaceholder.typicode.com/users";

const int http_port = 80;

void setup(void) {

Serial.begin(9600);

Serial.print("Bezig met verbinden");

WiFi.begin(ssid, password); // Connect to WiFi

// while wifi not connected yet, print '.'

// then after it connected, get out of the loop

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

// Verbonden.

Serial.println("OK!");

// Access Point (SSID).

Serial.print("SSID: ");

Serial.println(WiFi.SSID());

// IP adres.

Serial.print("IP: ");

Serial.println(WiFi.localIP());

// Signaalsterkte.

long rssi = WiFi.RSSI();

Serial.print("Signaal sterkte (RSSI): ");

Serial.print(rssi);

Serial.println(" dBm");

Serial.println("");

}

void loop() {

if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status

HTTPClient http; //Declare an object of class HTTPClient

http.begin("http://jsonplaceholder.typicode.com/users/1"); //Specify request destination

int httpCode = http.GET(); //Send the request

if (httpCode > 0) { //Check the returning code

String payload = http.getString(); //Get the request response payload

Serial.println(payload); //Print the response payload

}

http.end(); //Close connection

} else {

Serial.println("Error in WiFi connection");

}

delay(30000); //Send a request every 30 seconds

}

Output:

Bezig met verbinden........OK!
SSID: Swiebeltje
IP: 192.168.0.12
Signaal sterkte (RSSI): -44 dBm

{
 "id": 1,
 "name": "Leanne Graham",
 "username": "Bret",
 "email": "Sincere@april.biz",
 "address": {
 "street": "Kulas Light",
 "suite": "Apt. 556",
 "city": "Gwenborough",
 "zipcode": "92998-3874",
 "geo": {
 "lat": "-37.3159",
 "lng": "81.1496"
 }
 },
 "phone": "1-770-736-8031 x56442",
 "website": "hildegard.org",
 "company": {
 "name": "Romaguera-Crona",
 "catchPhrase": "Multi-layered client-server neural-net",
 "bs": "harness real-time e-markets"
 }
}

Bezig met verbinden........OK!

SSID: Swiebeltje

IP: 192.168.0.12

Signaal sterkte (RSSI): -44 dBm

{

"id": 1,

"name": "Leanne Graham",

"username": "Bret",

"email": "Sincere@april.biz",

"address": {

"street": "Kulas Light",

"suite": "Apt. 556",

"city": "Gwenborough",

"zipcode": "92998-3874",

"geo": {

"lat": "-37.3159",

"lng": "81.1496"

}

"phone": "1-770-736-8031 x56442",

"website": "hildegard.org",

"company": {

"name": "Romaguera-Crona",

"catchPhrase": "Multi-layered client-server neural-net",

"bs": "harness real-time e-markets"

}

Bronnen: techtutorialsx.com Een ander voorbeeld te gebruiken voor een GET commando met een PHP script, …

ESP8266 WiFi – HTTP GET request maken (ArduinoIDE) Read more »

ESP8266 WiFi – HTTP POST request maken (ArduinoIDE)

Op deze pagina staat een voorbeeld om met de ESP module in Arduino code (c++) een POST request te maken naar een website.

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
 
// WiFi parameters to be configured
const char* ssid = "ssid"; // Hoofdlettergevoelig
const char* password = "wachtwoord"; // Hoofdlettergevoelig
 
void setup(void) { 
  Serial.begin(9600);
  Serial.print("Bezig met verbinden");
  WiFi.begin(ssid, password); // Connect to WiFi
 
  // while wifi not connected yet, print '.'
  // then after it connected, get out of the loop
  while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
  }
  
  // Verbonden.
  Serial.println("OK!");
  
  // Access Point (SSID).
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());
  
  // IP adres.
  Serial.print("IP: ");
  Serial.println(WiFi.localIP());

  // Signaalsterkte.
  long rssi = WiFi.RSSI();
  Serial.print("Signaal sterkte (RSSI): ");
  Serial.print(rssi);
  Serial.println(" dBm");
  Serial.println("");

}

void loop() {
 if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status
   HTTPClient http; //Declare object of class HTTPClient
   
   http.begin("http://jsonplaceholder.typicode.com/users"); //Specify request destination
   http.addHeader("Content-Type", "text/plain"); //Specify content-type header
   int httpCode = http.POST("Hallo Wereld!"); //Send the request
   String payload = http.getString();  //Get the response payload
 
   Serial.println(httpCode); //Print HTTP return code
   Serial.println(payload); //Print request response payload
 
   http.end();  //Close connection
  } else {
    Serial.println("Error in WiFi connection");   
  }
  delay(30000);  //Send a request every 30 seconds
}

#include <ESP8266WiFi.h>

#include <ESP8266HTTPClient.h>

// WiFi parameters to be configured

const char* ssid = "ssid"; // Hoofdlettergevoelig

const char* password = "wachtwoord"; // Hoofdlettergevoelig

void setup(void) {

Serial.begin(9600);

Serial.print("Bezig met verbinden");

WiFi.begin(ssid, password); // Connect to WiFi

// while wifi not connected yet, print '.'

// then after it connected, get out of the loop

while (WiFi.status() != WL_CONNECTED) {

delay(500);

Serial.print(".");

}

// Verbonden.

Serial.println("OK!");

// Access Point (SSID).

Serial.print("SSID: ");

Serial.println(WiFi.SSID());

// IP adres.

Serial.print("IP: ");

Serial.println(WiFi.localIP());

// Signaalsterkte.

long rssi = WiFi.RSSI();

Serial.print("Signaal sterkte (RSSI): ");

Serial.print(rssi);

Serial.println(" dBm");

Serial.println("");

}

void loop() {

if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status

HTTPClient http; //Declare object of class HTTPClient

http.begin("http://jsonplaceholder.typicode.com/users"); //Specify request destination

http.addHeader("Content-Type", "text/plain"); //Specify content-type header

int httpCode = http.POST("Hallo Wereld!"); //Send the request

String payload = http.getString(); //Get the response payload

Serial.println(httpCode); //Print HTTP return code

Serial.println(payload); //Print request response payload

http.end(); //Close connection

} else {

Serial.println("Error in WiFi connection");

}

delay(30000); //Send a request every 30 seconds

}

Output:

Bezig met verbinden........OK!
SSID: Swiebeltje
IP: 192.168.0.12
Signaal sterkte (RSSI): -38 dBm

201
{
  "id": 11
}

Bezig met verbinden........OK!

SSID: Swiebeltje

IP: 192.168.0.12

Signaal sterkte (RSSI): -38 dBm

201

{

"id": 11

}

Bronnen: techtutorialsx.com

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ESP8266 WiFi – HTTP GET request maken (ArduinoIDE)

ESP8266 WiFi – HTTP POST request maken (ArduinoIDE)