Development

Communication / 4G:

» 4G 07: http POST

This example shows how to send HTTP POST requests

Required Materials

1 x Waspmote
1 x Battery
1 x 4G module
1 x 4G antenna
1 x SIM card

Notes

- The battery has to be connected.
- This example can be executed in Waspmote v15

Code

/*
    --------------- 4G_07 - HTTP POST  ---------------

    Explanation: This example shows how to send HTTP POST requests

    Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L.
    http://www.libelium.com

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

    Version:           3.0
    Design:            David Gascón
    Implementation:    Alejandro Gállego
*/

#include <Wasp4G.h>

// APN settings
///////////////////////////////////////
char apn[] = "";
char login[] = "";
char password[] = "";
///////////////////////////////////////

// SERVER settings
///////////////////////////////////////
char host[] = "test.libelium.com";
uint16_t port = 80;
char resource[] = "/test-get-post.php";
char data[] = "varA=1&varB=2&varC=3&varD=4&varE=5";
///////////////////////////////////////

// variables
int error;


void setup()
{
  USB.ON();
  USB.println(F("Start program"));

  USB.println(F("********************************************************************"));
  USB.println(F("POST method to the Libelium's test url"));
  USB.println(F("You can use this php to test the HTTP connection of the module."));
  USB.println(F("The php returns the parameters that the user sends with the URL."));
  USB.println(F("********************************************************************"));


  //////////////////////////////////////////////////
  // 1. sets operator parameters
  //////////////////////////////////////////////////
  _4G.set_APN(apn, login, password);


  //////////////////////////////////////////////////
  // 2. Show APN settings via USB port
  //////////////////////////////////////////////////
  _4G.show_APN();
}


void loop()
{

  //////////////////////////////////////////////////
  // 1. Switch ON
  //////////////////////////////////////////////////
  error = _4G.ON();

  if (error == 0)
  {
    USB.println(F("1. 4G module ready..."));


    ////////////////////////////////////////////////
    // 2. HTTP POST
    ////////////////////////////////////////////////

    USB.print(F("2. HTTP POST request..."));

    // send the request
    error = _4G.http( Wasp4G::HTTP_POST, host, port, resource, data);

    // check the answer
    if (error == 0)
    {
      USB.print(F("Done. HTTP code: "));
      USB.println(_4G._httpCode);
      USB.print("Server response: ");
      USB.println(_4G._buffer, _4G._length);
    }
    else
    {
      USB.print(F("Failed. Error code: "));
      USB.println(error, DEC);
    }
  }
  else
  {
    // Problem with the communication with the 4G module
    USB.println(F("4G module not started"));
    USB.print(F("Error code: "));
    USB.println(error, DEC);
  }

  ////////////////////////////////////////////////
  // 3. Powers off the 4G module
  ////////////////////////////////////////////////
  USB.println(F("3. Switch OFF 4G module"));
  _4G.OFF();


  ////////////////////////////////////////////////
  // 4. Sleep
  ////////////////////////////////////////////////
  USB.println(F("4. Enter deep sleep..."));
  PWR.deepSleep("00:00:00:10", RTC_OFFSET, RTC_ALM1_MODE1, ALL_OFF);

  USB.ON();
  USB.println(F("5. Wake up!!\n\n"));

}

Output

H#
Start program
********************************************************************
POST method to the Libelium's test url
You can use this php to test the HTTP connection of the module.
The php returns the parameters that the user sends with the URL.
********************************************************************
*****************************
APN:
LOGIN:
PASSWORD:
*****************************
1. 4G module ready...
2. HTTP POST request...Done. HTTP code: 200
Server response: method::post;varA::1;varB::2;varC::3;varD::4;varE::5;

3. Switch OFF 4G module
4. Enter deep sleep...
5. Wake up!!


1. 4G module ready...
2. HTTP POST request...Done. HTTP code: 200
Server response: method::post;varA::1;varB::2;varC::3;varD::4;varE::5;

3. Switch OFF 4G module
4. Enter deep sleep...

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