GSM shield

Development Tools IDE 1.x
1

hi guys im doing a project that recives sms's

I've bought GSM Sheild SM5100B-D

and wrote the following code, in oreder of reading SMS recived by the sim card

#include <GSM.h>
#define PINNUMBER ""

GSM gsmAccess;
GSM_SMS sms;
char sendingNumber [20]; //storing the number of the sender's sms

void setup(){
  
  Serial.begin(9600);
  Serial.println("sms reciving mode");
   boolean isConnected = false;
   
  while(isConnected){
    if(gsmAccess.begin(PINNUMBER)==GSM_READY){
      isConnected = true;
    }else{
      Serial.println("not connected");
      delay(1000);
    }
    Serial.println("GSM initialized.");
    Serial.println("Waiting for messages");
  }
}

void loop(){
   char tempSms;
   if(sms.available()){
     Serial.println("Message received from:");
     sms.remoteNumber(sendingNumber, 20); //gets the sender's number
     Serial.println(sendingNumber);
     while(tempSms=sms.read()){ // this loop reads the sms
       Serial.print(tempSms); // and print it char by char
     }
     Serial.println("\nEND OF MESSAGE");
   }
   delay(1000);
}

separately the SIM works fine

i get the following error:

avrdude: stk500_paged_write(): (a) protocol error, expect=0x14, resp=0x7e
avrdude: stk500_cmd(): programmer is out of sync

please help me out, what am i doing wrong

2

did you select the right board?
Similar errors are discussed every week in this section of the forum so you should find more elaborate answers there
Hope this helps,

PS, the title of your post does not match your question ....