NB-IoT 15: SSL sockets
This example shows how to open a SSL 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 NB-IoT / Cat-M module 2 x NB-IoT / Cat-M antenna 1 x SIM card
Notes
- The battery has to be connected. - This example can be executed in Waspmote v15
Code
/*
* ------ NB_IoT 15 - SSL sockets --------
*
* Explanation: This example shows how to open a SSL client socket
* to the specified server address and port. Besides, the functions
* for sending/receiving data are used.
*
* Copyright (C) 2019 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: 3.1
* Design: David Gascón
* Implementation: P.Moreno, J.Siscart
*/
#include <WaspBG96.h>
#include <WaspFrame.h>
uint8_t error;
uint32_t previous;
char data[500];
// APN settings
char apn[] = "";
char login[] = "";
char password[] = "";
///////////////////////////////////////
// Operator selection
///////////////////////////////////////
char network_operator[] = "";
///////////////////////////////////////
// options:
// LALPHANUMERIC_OPERATOR Long format alphanumeric which can be up to 16 characters long.
// SALPHANUMERIC_OPERATOR Short format alphanumeric .
// NUMERIC_OPERATOR Numeric . GSM location area identification number.
///////////////////////////////////////
uint8_t operator_type = LALPHANUMERIC_OPERATOR;
///////////////////////////////////////
// Band configuration
///////////////////////////////////////
// NB-IoT & LTE-M1 bands:
// B1
// B2
// B3
// B4
// B5
// B8
// B12
// B13
// B18
// B19
// B20
// B26
// B28
// B39
// ------------------------------------
// GSM bands:
// GSM900
// GSM1800
// GSM850
// GSM1900
// GSM_ANYBAND
// NB_ANYBAND
// M1_ANYBAND
/////////////////////////////////////
char band[] = B20;
/////////////////////////////////////
// SERVER settings
///////////////////////////////////////
char host[] = "test.libelium.com";
uint16_t remote_port = 443;
///////////////////////////////////////
// define data to send through TCP socket
///////////////////////////////////////
char http_format[] =
"GET /getpost_frame_parser.php?frame=%s HTTP/1.1\r\n"\
"Host: %s\r\n"\
"Content-Length: 0\r\n\r\n";
///////////////////////////////////////
// define Socket ID (from 'CONNECTION_1' to 'CONNECTION_6')
///////////////////////////////////////
uint8_t socketId = WaspBG96::CONNECTION_1;
///////////////////////////////////////
// define certificate for SSL
////////////////////////////////////////////////////////////////////////
char certificate[] =//
"-----BEGIN CERTIFICATE-----\r\n"\
"MIICNjCCAZ+gAwIBAgIJAL5/5O7w2Cm5MA0GCSqGSIb3DQEBCwUAMFMxLTArBgNV\r\n"\
"BAoMJExpYmVsaXVtIENvbXVuaWNhY2lvbmVzIERpc3RyaWJ1aWRhczELMAkGA1UE\r\n"\
"BhMCRVMxFTATBgNVBAMMDGxpYmVsaXVtLmNvbTAgFw0xNzAxMjQwOTU1MDJaGA8y\r\n"\
"MTE2MTIzMTA5NTUwMlowUzEtMCsGA1UECgwkTGliZWxpdW0gQ29tdW5pY2FjaW9u\r\n"\
"ZXMgRGlzdHJpYnVpZGFzMQswCQYDVQQGEwJFUzEVMBMGA1UEAwwMbGliZWxpdW0u\r\n"\
"Y29tMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCfI9j2DbbuK1fUrH1RKmnU\r\n"\
"EQ22r7FAT+R7uxOhSBnx61qlLjtZT9zuA7eMuq9k3tUBSkMxJjai6ebqmvPUpgrU\r\n"\
"0EoCZg+PrAglcvqAkzv8QDRueEi0hLCa8iTUsuora3viKMefbFR8ROH5uQrFnZK1\r\n"\
"1aUQxeV0HBL9zIH8ghaLmwIDAQABoxAwDjAMBgNVHRMEBTADAQH/MA0GCSqGSIb3\r\n"\
"DQEBCwUAA4GBAG2bWPWsfHzSqwlzY+5kJDeAgJ7GfQo51+QXqMq5nnjcPhgkIkvz\r\n"\
"IVOO2WM01Pnm3LuEQ3YS8eHS1blOL8i7GsxxIMR6aQ8E0XYbcizPvcyL+NAdIodd\r\n"\
"bSa087amkPIVcwETuGf2JdpbJLEjWayfcE1Ll+DA7UfX9korLzZzfDxX\r\n"\
"-----END CERTIFICATE-----";
////////////////////////////////////////////////////////////////////////
void setup()
{
USB.ON();
USB.println(F("Start program\n"));
//////////////////////////////////////////////////
// 1. sets operator parameters
//////////////////////////////////////////////////
BG96.set_APN(apn, login, password);
//////////////////////////////////////////////////
// 2. Show APN settings via USB port
//////////////////////////////////////////////////
BG96.show_APN();
}
void loop()
{
//////////////////////////////////////////////
// 1. Create a frame and data to send via HTTP request
//////////////////////////////////////////////
RTC.ON();
RTC.getTime();
RTC.OFF();
// set identifier
frame.setID("NB_IOT_TCP");
// 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, host);
USB.print(F("1. Data to send: "));
USB.println(data);
//////////////////////////////////////////////////
// 2. Switch ON the NB-IoT module
//////////////////////////////////////////////////
error = BG96.ON();
if (error == 0)
{
USB.println(F("2. NB-IoT module ready"));
////////////////////////////////////////////////
// 2.1. Check connection to network and continue
////////////////////////////////////////////////
error = BG96.nbiotConnection(apn, band, network_operator, operator_type);
if (error == 0)
{
USB.println(F("2.1. NB-IoT connection: OK "));
////////////////////////////////////////////////
// 2.2.1 NB-IoT Context Activation
////////////////////////////////////////////////
error = BG96.contextActivation(1,5);
if (error == 0)
{
USB.println(F("2.1. NB-IoT context connection: OK "));
USB.print(F("IP: ")); USB.println(BG96._ip);
////////////////////////////////////////////////
// 3. Setting DNS server
////////////////////////////////////////////////
error = BG96.setDNSServer("8.8.8.8","8.8.4.4");
if (error == 0)
{
USB.println(F("3. Setting DNS server: OK "));
}
else
{
USB.println(F("3. DNS error: ")); USB.println(error,DEC);
USB.println(BG96._buffer, BG96._length);
}
////////////////////////////////////////////////
// 3. Set CA certificate
////////////////////////////////////////////////
error = BG96.manageSSL(socketId, WaspBG96::SSL_ACTION_STORE, WaspBG96::SSL_TYPE_CA_CERT, certificate);
if (error == 0)
{
USB.println(F("3. Set CA certificate OK"));
}
else
{
USB.print(F("3. Error setting CA certificate. Error="));
USB.println(error, DEC);
}
////////////////////////////////////////////////
// 4. TCP socket
////////////////////////////////////////////////
error = BG96.openSocketSSL(socketId, host, remote_port);
if (error == 0)
{
USB.println(F("4. Opening a socket... done!"));
}
else
{
USB.print(F("4. Error opening socket. Error="));
USB.println(error, DEC);
}
//////////////////////////////////////////////
// 4.1. Send it through the connection
//////////////////////////////////////////////
// send TCP packet
error = BG96.sendSSL(socketId, data);
if (error == 0)
{
USB.println(F("4.1. Sending a frame... done!"));
}
else
{
USB.print(F("4.1. Error sending a frame. Code: "));
USB.println(error, DEC);
}
//////////////////////////////////////////////
// 4.2. Receive data
//////////////////////////////////////////////
// Wait for incoming data from the socket (if the other side responds)
USB.print(F("4.2. Waiting to receive data..."));
error = BG96.receiveSSL(socketId, 60000);
if (error == 0)
{
if (BG96.socketStatusSSL[socketId].received > 0)
{
USB.println(F("\n-----------------------------------"));
USB.print(F("Data received:"));
USB.println(BG96._buffer, BG96._length);
USB.println(F("-----------------------------------"));
}
else
{
USB.println(F("NO data received"));
}
}
else
{
USB.println(F("No data received."));
USB.println(error, DEC);
}
//////////////////////////////////////////////
// 4.3. Close socket
//////////////////////////////////////////////
error = BG96.closeSocketSSL(socketId);
if (error == 0)
{
USB.println(F("4.3. Socket closed OK"));
}
else
{
USB.print(F("4.3. Error closing socket. Error code: "));
USB.println(error, DEC);
}
}
}
}
else
{
// Problem with the communication with the NB-IoT module
USB.println(F("NB-IoT module not started"));
USB.print(F("Error code: "));
USB.println(error, DEC);
}
//////////////////////////////////////////////////
// 5. Switch OFF the NB-IoT module
//////////////////////////////////////////////////
error = BG96.OFF();
if (error == 0)
{
USB.println(F("5. Module is power off"));
}
else
{
USB.println(F("5. Power off ERROR"));
}
//////////////////////////////////////////////////
// 6. Sleep
//////////////////////////////////////////////////
USB.println(F("6. Enter deep sleep..."));
PWR.deepSleep("00:00:00:10", RTC_OFFSET, RTC_ALM1_MODE1, ALL_OFF);
USB.ON();
USB.println(F("7. Wake up!!\n\n"));
}Output
J#
Start program
*****************************
APN:
LOGIN:
PASSWORD:
*****************************
===============================
Current ASCII Frame:
Length: 48
Frame Type: 134
frame (HEX): 3C3D3E86012335303234333730353743313035343539234E425F494F545F54435023302354494D453A322D332D313123
frame (STR): <=>�#502437057C105459#NB_IOT_TCP#0#TIME:2-3-11#
===============================
1. Data to send: GET /getpost_frame_parser.php?frame=3C3D3E86012335303234333730353743313035343539234E425F494F545F54435023302354494D453A322D332D313123 HTTP/1.1
Host: test.libelium.com
Content-Length: 0
2. NB-IoT module ready
2.1. NB-IoT connection: OK
2.1. NB-IoT context connection: OK
IP: 10.175.33.117
3. Setting DNS server: OK
3. Set CA certificate OK
4. Opening a socket... done!
4.1. Sending a frame... done!
4.2. Waiting to receive data...
-----------------------------------
Data received:
+QSSLRECV: 331
HTTP/1.1 200 OK
Date: Tue, 19 Feb 2019 09:52:09 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.21
Vary: Accept-Encoding
Content-Length: 138
Content-Type: text/html
method::GET;
frame::3C3D3E86012335303234333730353743313035343539234E425F494F545F54435023302354494D453A322D332D313123;
TIME:2-3-11 ,
OK
-----------------------------------
4.3. Socket closed OK
5. Module is power off
6. Enter deep sleep...Last updated