4G 11: TCP client

This example shows how to open a TCP client socket to the specified server address and port. Besides, the functions for sending/receiving data are used.

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

Output

Last updated 4 years ago

/* --- 4G_11 - TCP client --- Explanation: This example shows how to open a TCP client socket to the specified server address and port. Besides, the functions for sending/receiving data are used. Copyright (C) 2018 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 . Version: 3.2 Design: David Gascón Implementation: Alejandro Gállego */ #include <Wasp4G.h> #include <WaspFrame.h> // APN settings /////////////////////////////////////// char apn[] = "movistar.es"; char login[] = "movistar"; char password[] = "movistar"; /////////////////////////////////////// // SERVER settings /////////////////////////////////////// char host[] = "test.libelium.com"; uint16_t remote_port = 80; /////////////////////////////////////// // define Socket ID (from 'CONNECTION_1' to 'CONNECTION_6') /////////////////////////////////////// uint8_t connId = Wasp4G::CONNECTION_1; /////////////////////////////////////// // define data to send through TCP socket /////////////////////////////////////// char http_format[] = "GET /getpost_frame_parser.php?frame=%s HTTP/1.1\r\n"\ "Host: test.libelium.com\r\n"\ "Content-Length: 0\r\n\r\n"; /////////////////////////////////////// // define variables uint8_t error; uint32_t previous; uint8_t socketIndex; char data[500]; void setup() { USB.ON(); USB.println(F("Start program")); ////////////////////////////////////////////////// // 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...")); //////////////////////////////////////////////// // Enter PIN code //////////////////////////////////////////////// /* USB.println(F("Enter PIN code...")); if (_4G.enterPIN("****") == 1) { USB.println(F("PIN code accepted")); } else { USB.println(F("PIN code incorrect")); } */ //////////////////////////////////////////////// // 2. TCP socket //////////////////////////////////////////////// error = _4G.openSocketClient(connId, Wasp4G::TCP, host, remote_port); if (error == 0) { USB.println(F("2.1. Opening a socket... done!")); USB.print(F("IP address:")); USB.println(_4G._ip); ////////////////////////////////////////////// // 2.2. Create a frame and data to send via HTTP request ////////////////////////////////////////////// RTC.ON(); RTC.getTime(); // set identifier frame.setID("Node01"); // Create new frame (ASCII) frame.createFrame(ASCII); // set frame fields (Time from RTC) frame.addSensor(SENSOR_TIME, RTC.hour, RTC.minute, RTC.second); // show frame contents frame.showFrame(); // define aux buffer char frame_string[frame.length*2 + 1]; memset(frame_string, 0x00, sizeof(frame_string)); // convert frame from bytes to ASCII representation Utils.hex2str((uint8_t*)frame.buffer, (char*)frame_string, frame.length); snprintf( data, sizeof(data), http_format, frame_string); USB.print(F("data to send:")); USB.println(data); ////////////////////////////////////////////// // 2.3. Send it through the connection ////////////////////////////////////////////// // send TCP packet error = _4G.send(connId, data); if (error == 0) { USB.println(F("2.3. Sending a frame... done!")); } else { USB.print(F("2.3. Error sending a frame. Code: ")); USB.println(error, DEC); } ////////////////////////////////////////////// // 2.4. Receive data ////////////////////////////////////////////// // Wait for incoming data from the socket (if the other side responds) USB.print(F("2.4. Waiting to receive data...")); error = _4G.receive(connId, 60000); if (error == 0) { if (_4G.socketInfo[connId].size > 0) { USB.println(F("\n-----------------------------------")); USB.print(F("Data received:")); USB.println(_4G._buffer, _4G._length); USB.println(F("-----------------------------------")); } else { USB.println(F("NO data received")); } } else { USB.println(F("No data received.")); USB.println(error, DEC); } } else { USB.print(F("2.1. Error opening socket. Error code: ")); USB.println(error, DEC); } ////////////////////////////////////////////// // 2.5. Close socket ////////////////////////////////////////////// error = _4G.closeSocketClient(connId); if (error == 0) { USB.println(F("2.5. Socket closed OK")); } else { USB.print(F("2.5. Error closing socket. Error code: ")); USB.println(error, DEC); } } else { // Problem with the communication with the 4G module USB.println(F("1. 4G module not started")); } //////////////////////////////////////////////// // 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")); }