Remove 32767 limit in example and add SdFat example

Author: siara-cc

examples/Uno_and_above/Uno_and_above.ino

@@ -95,7 +95,7 @@ int input_string(char *str, int max_len) {
   return ctr;
 }
 
-int input_num() {
+int32_t input_num() {
   char in[20];
   int ctr = 0;
   in[ctr] = 0;
@@ -109,7 +109,7 @@ int input_num() {
     }
   }
   in[ctr] = 0;
-  int ret = atoi(in);
+  int32_t ret = atol(in);
   Serial.print(ret);
   Serial.print(F("\n"));
   return ret;
@@ -257,7 +257,7 @@ int input_ts(char *datetime) {
 }
 
 void log_analog_data() {
-  int num_entries;
+  int32_t num_entries;
   int dly;
   input_db_name();
   Serial.print(F("\nRecord count (1 to 32767 on UNO): "));