Hello everyone,
I have a problem with my GSM A6 Module, the program runs well but when I reset the module or unplug and plug the power supply, it does not work again !!!! until I upload a sketch which use serial monitor to communicate with the module by AT command, and then I upload again my program to work again ! is it problem of synchronization between arduino and the module at the beginning when powered up ?? what would make the module works only one time until it is powered off ? please can you help me guys !
thankx !
this is the program based on a youtube channel :
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX-Pin10, TX-Pin11
unsigned char Buff[250];
unsigned char BuffIndex;
boolean Act = false;
void setup()
{
//Serial.begin(4800);
mySerial.begin(9600);
pinMode(9, OUTPUT);
digitalWrite(9,HIGH);
delay(3000);
mySerial.println("AT+CMGF=1");
delay(3000);
mySerial.println("AT+CNMI=2,2,0,0,0");
memset(Buff, '\0', 250); // Initialize the string
BuffIndex=5;
}
void SMS_On() {
mySerial.println("AT+CMGF=1");
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
delay(1000);
mySerial.print("AT+CMGS="mynumber");
mySerial.print(char(34)); // "
mySerial.print(char(13)); // CR
mySerial.print('\r'); // hex equivalent of newline
delay(1000);
mySerial.println("Motor On");
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
delay(500);
mySerial.println(char(26)); //ctrl_z
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
}
void SMS_Off() {
mySerial.println("AT+CMGF=1");
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
delay(1000);
mySerial.print("AT+CMGS="mynumber");
mySerial.print(char(34)); // "
mySerial.print(char(13)); // CR
mySerial.print('\r'); // hex equivalent of newline
delay(1000);
mySerial.println("Motor Off);
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
delay(500);
mySerial.println(char(26)); //ctrl_z
//mySerial.write(0x0D); // hex equivalent of Carraige return
//mySerial.write(0x0A); // hex equivalent of newline
}
void loop()
{
while(1)
{
if(mySerial.available()>0)
{
Buff[BuffIndex] = mySerial.read();
if((Buff[BuffIndex-1] == 'O') && (Buff[BuffIndex] == 'n'))
{
//Serial.print('\n');
//Serial.write(Buff[BuffIndex-1]);
//Serial.write(Buff[BuffIndex]);
Act=true;
if(Act==true)
{
SMS_On();
digitalWrite(9,LOW);
Act=false;
}
}
if( (Buff[BuffIndex-2] == 'O') && (Buff[BuffIndex-1] == 'f') && (Buff[BuffIndex] == 'f'))
{
//Serial.print('\n');
//Serial.write(Buff[BuffIndex-2]);
//Serial.write(Buff[BuffIndex-1]);
//Serial.write(Buff[BuffIndex]);
Act=false;
if(Act==false)
{
SMS_Off();
digitalWrite(9,HIGH);
Act=true;
}
}
BuffIndex++;
if(BuffIndex>250)
{
BuffIndex=5;
}
}
}
delay(10);
}