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/*************************************************************************
* SIM800 GPRS/HTTP Library
* Distributed under GPL v2.0
* Written by Stanley Huang <stanleyhuangyc@gmail.com>
* For more information, please visit http://arduinodev.com
*************************************************************************/
#include <Arduino.h>
// change this to the pin connect with SIM800 reset pin
#define SIM800_RESET_PIN 7
// change this to the serial UART which SIM800 is attached to
#define simser Serial1
// change this to the serial UART used for console
#define con Serial
// change this to 1 to enable debug information output
#define DEBUG 0
typedef enum {
HTTP_DISABLED = 0,
HTTP_READY,
HTTP_CONNECTING,
HTTP_READING,
HTTP_ERROR,
} HTTP_STATES;
typedef struct {
float lat;
float lon;
uint8_t year; /* year past 2000, e.g. 15 for 2015 */
uint8_t month;
uint8_t day;
uint8_t hour;
uint8_t minute;
uint8_t second;
} GSM_LOCATION;
class CGPRS_SIM800 {
public:
CGPRS_SIM800():httpState(HTTP_DISABLED) {}
bool init();
byte setup(const char* apn);
bool getOperatorName();
bool checkSMS();
int getSignalQuality();
bool getLocation(GSM_LOCATION* loc);
// initialize HTTP connection
bool httpInit();
// terminate HTTP connection
void httpUninit();
// connect to HTTP server
bool httpConnect(const char* url, const char* args = 0);
// check if HTTP connection is established
// return 0 for in progress, 1 for success, 2 for error
byte httpIsConnected();
// read data from HTTP connection
void httpRead();
// check if HTTP connection is established
// return 0 for in progress, -1 for error, number of http payload bytes on success
int httpIsRead();
// send AT command and check for expected response
byte sendCommand(const char* cmd, unsigned int timeout = 2000, const char* expected = 0);
// send AT command and check for two possible responses
byte sendCommand(const char* cmd, const char* expected1, const char* expected2, unsigned int timeout = 2000);
// toggle low-power mode
bool sleep(bool enabled)
{
return sendCommand(enabled ? "AT+CFUN=0" : "AT+CFUN=1");
}
// check if there is available serial data
bool available()
{
return simser.available();
}
char buffer[256];
byte httpState;
private:
byte checkbuffer(const char* expected1, const char* expected2 = 0, unsigned int timeout = 2000);
void purgeSerial();
byte m_bytesRecv;
uint32_t m_checkTimer;
};
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