Unable to receive message from GSM using Arduino uno to phone but able to send message from phone to gsm .
shows an error like in the attached snapshot of the serial monitor.
CODE:
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10,11);
void setup() {
mySerial.begin(9600); // Setting the baud rate of GSM Module
Serial.begin(9600); // Setting the baud rate of Serial Monitor (Arduino)
delay(100);
}
void loop()
{
if (Serial.available()>0)
switch(Serial.read())
{
case 's':
mySerial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
delay(1000); // Delay of 1 second
mySerial.println("AT+CMGS=\"+919490854138\"\r");
delay(1000);
mySerial.println("hey!!!!!!!!");// The SMS text you want to send
delay(100);
mySerial.println((char)26);// ASCII code of CTRL+Z for saying the end of sms to the module
delay(1000);
break;
case 'r':
mySerial.println("AT+CNMI=2,2,0,0,0"); // AT Command to receive a live SMS
delay(1000);
break;
}
if (mySerial.available()>0)
Serial.write(mySerial.read());
}
