Hello,
I am building a system that reads once a day new parameters from a web server, using HTTP, and SIM800 library by Olivier Staquet.
The library uses a destructor, with this code:
/**
* Destructor; cleanup the memory allocated by the driver
*/
SIM800L::~SIM800L() {
free(internalBuffer);
free(recvBuffer);
}
After reading the web server parameters, I want to make sure all resources generated by the "new" created object are destroyed, and memory released.
How to make sure this happens ?
My calling code (that is only the part that reads from server):
#include <SIM800L.h>
/********************************************************************************
* Example of HTTPS GET with SoftwareSerial and Arduino-SIM800L-driver *
* *
* Author: Olivier Staquet *
* Last version available on https://github.com/ostaquet/Arduino-SIM800L-driver *
********************************************************************************
*******************************************************************************/
/* Stripped down version GET removed
Using library SIM800L in folder: D:\AsusCloud\Electronica\Arduino\Development\libraries\SIM800L (legacy)
Using library SoftwareSerial at version 1.0 in folder: C:\Users\horac\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\libraries\SoftwareSerial
"C:\\Users\\horac\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-size" -A "C:\\Users\\horac\\AppData\\Local\\Temp\\arduino\\sketches\\B24C07207DABA7577980D9D52EF9430B/HTTPS_GET_SoftSerial_testHbb_1_StrippedDown.ino.elf"
Sketch uses 12378 bytes (38%) of program storage space. Maximum is 32256 bytes.
Global variables use 530 bytes (25%) of dynamic memory, leaving 1518 bytes for local variables. Maximum is 2048 bytes.
*/
//HBB DELETE SEEMS TO DO NOTHING
// att remove delete and pointer study
#include <SoftwareSerial.h>
#define SIM800_RX_PIN 8
#define SIM800_TX_PIN 9
#define SIM800_RST_PIN 6
//const char APN[] = "datos.personal.com";
const char APN[] = "em";
const char URL[] = "http://nutritronix.com/selectV201W.php";
const char CONTENT_TYPE[] = "application/x-www-form-urlencoded";
const char PAYLOAD[] = "api_key=tPmAT5Ab3j7F9&device#=BC94";
SIM800L *sim800l;
void setup() {
Serial.begin(9600); // Initialize Serial Monitor for debugging
Serial.println(F("Start setup POST testHbb_1_strippedDown-01.ino")); // while(!Serial); hbb what for ?
//A-> just to wait in some AvrS serial init before executing
SoftwareSerial* serial = new SoftwareSerial(SIM800_RX_PIN, SIM800_TX_PIN);// Initialize a SoftwareSerial
serial->begin(9600);
delay(1000);
// Initialize SIM800L driver with an internal buffer of 200 bytes and a reception buffer of 512 bytes, debug disabled
sim800l = new SIM800L((Stream *)serial, SIM800_RST_PIN, 200, 512);
int hbb;
hbb = (unsigned int)sim800l;
Serial.print("sim800l (before): ");
Serial.println(hbb, HEX);
//delete sim800l;
hbb = (unsigned int)sim800l;
Serial.print("sim800l (after): ");
Serial.println(hbb, HEX);
// Equivalent line with the debug enabled on the Serial
// sim800l = new SIM800L((Stream *)serial, SIM800_RST_PIN, 200, 512, (Stream *)&Serial);
setupModule(); // Setup module for GPRS communication
}
void loop() {
// Establish GPRS connectivity (5 trials)
bool connected = false;
for(uint8_t i = 0; i < 5 && !connected; i++) {
delay(1000);
connected = sim800l->connectGPRS();
}
// Check if connected, if not reset the module and setup the config again
if(connected) {
Serial.print(F("GPRS connected with IP "));
Serial.println(sim800l->getIP());
Serial.println(sim800l->getDES());
} else {
Serial.println(F("GPRS not connected !"));
Serial.println(F("Reset the module."));
sim800l->reset();
setupModule();
return;
}
Serial.println(F("Start HTTP POST..."));
// Do HTTP POST communication with 10s for the timeout (read and write)
uint16_t rc = sim800l->doPost(URL, CONTENT_TYPE, PAYLOAD, 10000, 10000);
if(rc == 200) {
// Success, output the data received on the serial
Serial.print(F("HTTP POST successful ("));
Serial.print(sim800l->getDataSizeReceived());
Serial.println(F(" bytes)"));
Serial.print(F("Received : "));
Serial.println(sim800l->getDataReceived());
} else {
// Failed...
Serial.print(F("HTTP POST error "));
Serial.println(rc);
}
delay(1000);
// Close GPRS connectivity (5 trials)
bool disconnected = sim800l->disconnectGPRS();
for(uint8_t i = 0; i < 5 && !connected; i++) {
delay(1000);
disconnected = sim800l->disconnectGPRS();
}
if(disconnected) {
Serial.println(F("GPRS disconnected !"));
} else {
Serial.println(F("GPRS still connected !"));
}
// Go into low power mode
bool lowPowerMode = sim800l->setPowerMode(MINIMUM);
if(lowPowerMode) {
Serial.println(F("Module in low power mode"));
sim800l='0';
} else {
Serial.println(F("Failed to switch module to low power mode"));
}
}
void setupModule() {
// Wait until the module is ready to accept AT commands
//HBB
Serial.print(F("Reseting SIM800L..."));
sim800l->reset();
delay(10000);
Serial.print(F("End Reset SIM800L..."));
while(!sim800l->isReady()) {
Serial.println(F("Problem to initialize AT command, retry in 1 sec"));
delay(1000);
}
Serial.println(F("Setup Complete!"));
// Wait for the GSM signal
uint8_t signal = sim800l->getSignal();
while(signal <= 0) {
delay(1000);
signal = sim800l->getSignal();
}
Serial.print(F("Signal OK (strenght: "));
Serial.print(signal);
Serial.println(F(")"));
delay(1000);
// Wait for operator network registration (national or roaming network)
NetworkRegistration network = sim800l->getRegistrationStatus();
while(network != REGISTERED_HOME && network != REGISTERED_ROAMING) {
delay(1000);
network = sim800l->getRegistrationStatus();
}
Serial.println(F("Network registration OK"));
delay(1000);
// Setup APN for GPRS configuration
bool success = sim800l->setupGPRS(APN);
while(!success) {
success = sim800l->setupGPRS(APN);
delay(5000);
}
Serial.println(F("GPRS config OK"));
}
Thanks a lot !
Regards,
Horacio
