hi please someone check what is wrong with the coding. Push button not pressed yet but sim900a keep sending me sms non stop.
#include "Adafruit_FONA.h"
#define FONA_RX 2
#define FONA_TX 3
#define FONA_RST 4
char replybuffer[255];
#include <SoftwareSerial.h>
SoftwareSerial fonaSS = SoftwareSerial(FONA_TX, FONA_RX);
SoftwareSerial *fonaSerial = &fonaSS;
Adafruit_FONA fona = Adafruit_FONA(FONA_RST);
uint8_t readline(char *buff, uint8_t maxbuff, uint16_t timeout = 0);
//#define FONA_RI_INTERRUPT 1
#define RELAY_PIN 9
#define BUTTON_PIN 8
short sButton_Read = 0;
String smsString = "";
unsigned short gusIsSend_Bef = 0;
char szPhoneNum[] = "+60xxxxxxx"; //fill in your phone number
void setup()
{
pinMode(RELAY_PIN, OUTPUT);
digitalWrite(RELAY_PIN, HIGH);
pinMode(BUTTON_PIN, INPUT);
Serial.begin(115200);
Serial.println(F("FONA SMS caller ID test"));
Serial.println(F("Initializing....(May take 3 seconds)"));
// make it slow so its easy to read!
fonaSerial->begin(4800);
if (! fona.begin(*fonaSerial))
{
Serial.println(F("Couldn't find FONA"));
while(1);
}
Serial.println(F("FONA is OK"));
// Print SIM card IMEI number.
char imei[16] = {0}; // MUST use a 16 character buffer for IMEI!
uint8_t imeiLen = fona.getIMEI(imei);
if (imeiLen > 0)
{
Serial.print("SIM card IMEI: "); Serial.println(imei);
}
/* // Enable incoming call notification.
if(fona.callerIdNotification(true, FONA_RI_INTERRUPT)) {
Serial.println(F("Caller id notification enabled."));
}
else {
Serial.println(F("Caller id notification disabled"));
}*/
fonaSerial->print("AT+CNMI=2,1\r\n"); //set up the FONA to send a +CMTI notification when an SMS is received
Serial.println("FONA Ready");
}
char fonaNotificationBuffer[64]; //for notifications from the FONA
char smsBuffer[250];
void loop()
{
char number, message;
char* bufPtr = fonaNotificationBuffer; //handy buffer pointer
sButton_Read = sRead_Button();
if(sButton_Read == 1)
{
if(gusIsSend_Bef == 0)
{
if(!fona.sendSMS(szPhoneNum, "button is pressed!"))
{
Serial.println(F("Failed"));
}
else
{
Serial.println(F("Sent!"));
}
gusIsSend_Bef = 1;
}
}
else
{
gusIsSend_Bef = 0;
}
if(fona.available()) //any data available from the FONA?
{
int slot = 0; //this will be the slot number of the SMS
int charCount = 0;
//Read the notification into fonaInBuffer
do
{
*bufPtr = fona.read();
Serial.write(*bufPtr);
delay(1);
} while ((*bufPtr++ != '\n') && (fona.available()) && (++charCount < (sizeof(fonaNotificationBuffer)-1)));
//Add a terminal NULL to the notification string
*bufPtr = 0;
//Scan the notification string for an SMS received notification.
// If it's an SMS message, we'll get the slot number in 'slot'
if (1 == sscanf(fonaNotificationBuffer, "+CMTI: " FONA_PREF_SMS_STORAGE ",%d", &slot))
{
Serial.print("slot: "); Serial.println(slot);
char callerIDbuffer[32]; //we'll store the SMS sender number in here
// Retrieve SMS sender address/phone number.
if (! fona.getSMSSender(slot, callerIDbuffer, 31))
{
Serial.println("Didn't find SMS message in slot!");
}
Serial.print(F("FROM: ")); Serial.println(callerIDbuffer);
// Retrieve SMS value.
uint16_t smslen;
if (fona.readSMS(slot, smsBuffer, 250, &smslen)) // pass in buffer and max len!
{
smsString = String(smsBuffer);
Serial.println(smsString);
}
if (smsString == "open")
{
Serial.println("opened.");
digitalWrite(RELAY_PIN, LOW);
delay(100);
digitalWrite(RELAY_PIN, HIGH);
delay(100);
if(!fona.sendSMS(callerIDbuffer,"door opened." ))
{
Serial.println(F("Failed"));
}
else
{
Serial.println(F("Sent!"));
}
}
else if(smsString == "close")
{
Serial.println("close");
digitalWrite(RELAY_PIN, HIGH);
delay(100);
if(!fona.sendSMS(callerIDbuffer, "door closed."))
{
Serial.println(F("Failed"));
}
else
{
Serial.println(F("Sent!"));
}
}
while(1)
{
if(fona.deleteSMS(slot))
{
Serial.println(F("OK!"));
break;
}
else
{
Serial.print(F("Couldn't delete SMS in slot ")); Serial.println(slot);
fona.print(F("AT+CMGD=?\r\n"));
}
}
}
}
}
short sRead_Button(void)
{
short sButton_Value = 0;
sButton_Value = digitalRead(BUTTON_PIN);
return sButton_Value;
}
