SoftwareSerial dependency removed. Upgraded to support C++11

.gitignore

@@ -1 +1,2 @@
-.DS_Store
+.DS_Store
+.vscode

README.md

@@ -64,7 +64,8 @@ SoftwareSerial shieldSerial(7, 8);  //RX and TX
 
 void setup() {
   Serial.begin(9600);               // Initialize serial communication
-  SIM900 sim900(&shieldSerial);     // Initialize the SIM900 shield
+  shieldSerial.begin(9600) // Initialize shield communication
+  SIM900 sim900(shieldSerial);     // Initialize the SIM900 shield
 
   // Your code goes here...
 }

examples/apn_example/apn_example.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
 
   SIM900APN access;
   access.apn = F("");

examples/board_info/board_info.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
 
   Serial.println(F("Dumping board informations..."));
   Serial.println(F("-----------------------------------------"));

examples/card_info/card_info.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   uint8_t phonebookIndex = 1;
 
   SIM900CardAccount accountInfo;

examples/dial_up/dial_up.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
 
   sim900.dialUp("+XXxxxxxxxxxx");
   delay(20000);

examples/handshake/handshake.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
 
   Serial.println(
     sim900.handshake() ? "Handshaked!" : "Something went wrong."

examples/network_op/network_op.ino

@@ -6,7 +6,8 @@ SoftwareSerial shieldSerial(7, 8);
 void setup() {
   Serial.begin(9600);
 
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   SIM900Operator network = sim900.networkOperator();
 
   Serial.println(F("SIM900 Current Network Operator"));

examples/phonebook_capacity/phonebook_capacity.ino

@@ -6,7 +6,8 @@ SoftwareSerial shieldSerial(7, 8);
 void setup() {
   Serial.begin(9600);
 
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   SIM900PhonebookCapacity capacity = sim900.phonebookCapacity();
 
   Serial.println(F("Phonebook Capacity"));

examples/phonebook_example/phonebook_example.ino

@@ -5,7 +5,8 @@ SoftwareSerial shieldSerial(7, 8);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   uint8_t index = 1;
 
   SIM900CardAccount account;

examples/rtc_example/rtc_example.ino

@@ -7,7 +7,8 @@ void printRTC(SIM900RTC rtc);
 
 void setup() {
   Serial.begin(9600);
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
 
   SIM900RTC rtc;
   rtc.year = 2;

examples/signal_strength/signal_strength.ino

@@ -6,7 +6,8 @@ SoftwareSerial shieldSerial(7, 8);
 void setup() {
   Serial.begin(9600);
 
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   SIM900Signal signal = sim900.signal();
 
   Serial.println(F("Signal Strength"));

examples/sms_send_example/sms_send_example.ino

@@ -6,7 +6,8 @@ SoftwareSerial shieldSerial(7, 8);
 void setup() {
   Serial.begin(9600);
 
-  SIM900 sim900(&shieldSerial);
+  shieldSerial.begin(9600);
+  SIM900 sim900(shieldSerial);
   Serial.println(
     sim900.sendSMS("+XXxxxxxxxxxx", "Hello, world!!")
       ? "Sent!" : "Not sent."

src/sim900.cpp

@@ -21,18 +21,17 @@
  * THE SOFTWARE.
  */
 
-#include <sim900.h>
-#include <SoftwareSerial.h>
+#include "sim900.h"
 
 void SIM900::sendCommand(String message) {
-    this->sim900->println(message);
+    this->sim900.println(message);
 }
 
 String SIM900::getResponse() {
     delay(500);
 
-    if(this->sim900->available() > 0) {
-        String response = this->sim900->readString();
+    if(this->sim900.available() > 0) {
+        String response = this->sim900.readString();
         response.trim();
 
         return response;
@@ -82,10 +81,7 @@ String SIM900::queryResult() {
     return result;
 }
 
-SIM900::SIM900(SoftwareSerial *_sim900):
-    sim900(_sim900) {
-    this->sim900->begin(9600);
-}
+SIM900::SIM900(Stream& _sim900):sim900(_sim900){}
 
 bool SIM900::handshake() {
     this->sendCommand(F("AT"));
@@ -122,9 +118,9 @@ SIM900Signal SIM900::signal() {
     return signal;
 }
 
-void SIM900::close() {
-    this->sim900->end();
-}
+// void SIM900::close() {
+//     this->sim900->end();
+// }
 
 SIM900DialResult SIM900::dialUp(String number) {
     this->sendCommand("ATD+ " + number + ";");
@@ -194,15 +190,15 @@ bool SIM900::sendSMS(String number, String message) {
     delay(500);
     this->sendCommand(message);
     delay(500);
-    this->sim900->write(0x1a);
+    this->sim900.write(0x1a);
 
     return this->getReturnedMode().startsWith(">");
 }
 
 SIM900Operator SIM900::networkOperator() {
     SIM900Operator simOperator;
-    simOperator.mode = 0;
-    simOperator.format = 0;
+    simOperator.mode = static_cast<SIM900OperatorMode>(0);
+    simOperator.format = static_cast<SIM900OperatorFormat>(0);
     simOperator.name = "";
 
     this->sendCommand(F("AT+COPS?"));
@@ -211,8 +207,8 @@ SIM900Operator SIM900::networkOperator() {
     uint8_t delim1 = response.indexOf(','),
         delim2 = response.indexOf(',', delim1 + 1);
 
-    simOperator.mode = (uint8_t) response.substring(0, delim1).toInt();
-    simOperator.format = (uint8_t) response.substring(delim1 + 1, delim2).toInt();
+    simOperator.mode = intToSIM900OperatorMode((uint8_t) response.substring(0, delim1).toInt());
+    simOperator.format = intToSIM900OperatorFormat((uint8_t) response.substring(delim1 + 1, delim2).toInt());
     simOperator.name = response.substring(delim2 + 2, response.length() - 2);
 
     return simOperator;
@@ -347,7 +343,7 @@ SIM900CardAccount SIM900::retrievePhonebook(uint8_t index) {
     this->sendCommand("AT+CPBR=" + String(index));
 
     SIM900CardAccount accountInfo;
-    accountInfo.numberType = 0;
+    accountInfo.numberType = static_cast<SIM900PhonebookType>(0);
 
     String response = this->queryResult();
     response = response.substring(response.indexOf(',') + 1);
@@ -359,8 +355,8 @@ SIM900CardAccount SIM900::retrievePhonebook(uint8_t index) {
 
     uint8_t type = (uint8_t) response.substring(delim1 + 1, delim2).toInt();
     if(type == 129 || type == 145)
-        accountInfo.numberType = type;
-    else accountInfo.numberType = 0;
+        accountInfo.numberType = static_cast<SIM900PhonebookType>(type);
+    else accountInfo.numberType = static_cast<SIM900PhonebookType>(0);
 
     accountInfo.name = response.substring(delim2 + 2, response.length() - 2);
     return accountInfo;
@@ -408,8 +404,8 @@ SIM900CardAccount SIM900::cardNumber() {
     account.number = response.substring(delim1 + 2, delim2 - 1);
     account.type = (uint8_t) response.substring(delim2 + 1, delim3).toInt();
     account.speed = (uint8_t) response.substring(delim3 + 1, delim4).toInt();
-    account.service = (uint8_t) response.substring(delim4 + 1).toInt();
-    account.numberType = 0;
+    account.service = intToSIM900CardService((uint8_t) response.substring(delim4 + 1).toInt());
+    account.numberType = static_cast<SIM900PhonebookType>(0);
 
     return account;
 }

src/sim900.h

@@ -25,9 +25,8 @@
 #define SIM900_H
 
 #include <Arduino.h>
-#include <SoftwareSerial.h>
 
-#include <sim900_defs.h>
+#include "sim900_defs.h"
 
 /**
  * 
@@ -42,7 +41,7 @@
 class SIM900 {
 private:
     /// The SoftwareSerial object used for communication with the SIM900 module.
-    SoftwareSerial *sim900;
+    Stream& sim900;
 
     /// A flag indicating whether Access Point Name (APN) configuration is set.
     bool hasAPN = false;
@@ -73,7 +72,7 @@ class SIM900 {
      * @param _sim900 A pointer to the SoftwareSerial object for communication with the SIM900 module.
      * 
      */
-    SIM900(SoftwareSerial *_sim900);
+    SIM900(Stream& _sim900);
 
     /**
      * 

src/sim900_defs.h

@@ -87,6 +87,23 @@ typedef enum _SIM900OperatorFormat {
     SIM900_OPERATOR_FORMAT_MANUAL_AUTO
 } SIM900OperatorFormat;
 
+/**
+ * @param i Integer input to be casted.
+ * @return A valid SIM900OperatorFormat value.
+ * 
+ * @brief A function to safely cast from integer value to SIM900OperatorFormat. Invalid inputs are casted to default value of SIM900_OPERATOR_FORMAT_AUTO.
+ * 
+ * From C++11 up to newer versions of C++, enumerators are considered as a specific type rather than integer 
+ * values. The same is true for newer Arduino compilers, too. So impilicit cast of integer value to an enum type is no longer allowed. For the sake of the safety of an explicit
+ * cast is better to first check the range of the input. 
+*/
+SIM900OperatorFormat intToSIM900OperatorFormat(int i){
+    if (i < SIM900OperatorFormat::SIM900_OPERATOR_FORMAT_AUTO || i > SIM900OperatorFormat::SIM900_OPERATOR_FORMAT_MANUAL_AUTO)
+        return SIM900OperatorFormat::SIM900_OPERATOR_FORMAT_AUTO;
+    else
+        return static_cast<SIM900OperatorFormat>(i);
+}
+
 /**
  * 
  * @enum SIM900OperatorMode
@@ -122,6 +139,23 @@ typedef enum _SIM900OperatorMode {
     SIM900_OPERATOR_MODE_E_UTRAN
 } SIM900OperatorMode;
 
+/**
+ * @param i Integer input to be casted.
+ * @return A valid SIM900OperatorMode value.
+ * 
+ * @brief A function to safely cast from integer value to SIM900OperatorMode. Invalid inputs are casted to default value of SIM900_OPERATOR_MODE_GSM.
+ * 
+ * From C++11 up to newer versions of C++, enumerators are considered as a specific type rather than integer 
+ * values. The same is true for newer Arduino compilers, too. So impilicit cast of integer value to an enum type is no longer allowed. For the sake of the safety of an explicit
+ * cast is better to first check the range of the input. 
+*/
+SIM900OperatorMode intToSIM900OperatorMode(int i){
+    if (i < SIM900OperatorMode::SIM900_OPERATOR_MODE_GSM || i > SIM900OperatorMode::SIM900_OPERATOR_MODE_E_UTRAN)
+        return SIM900OperatorMode::SIM900_OPERATOR_MODE_GSM;
+    else
+        return static_cast<SIM900OperatorMode>(i);
+}
+
 /**
  * 
  * @enum SIM900CardService
@@ -150,6 +184,23 @@ typedef enum _SIM900CardService {
     SIM900_CARD_SERVICE_FAX
 } SIM900CardService;
 
+/**
+ * @param i Integer input to be casted.
+ * @return A valid SIM900CardService value.
+ * 
+ * @brief A function to safely cast from integer value to SIM900CardService. Invalid inputs are casted to default value of SIM900_CARD_SERVICE_ASYNC.
+ * 
+ * From C++11 up to newer versions of C++, enumerators are considered as a specific type rather than integer 
+ * values. The same is true for newer Arduino compilers, too. So impilicit cast of integer value to an enum type is no longer allowed. For the sake of the safety of an explicit
+ * cast is better to first check the range of the input. 
+*/
+SIM900CardService intToSIM900CardService(int i){
+    if (i < SIM900CardService::SIM900_CARD_SERVICE_ASYNC || i > SIM900CardService::SIM900_CARD_SERVICE_FAX)
+        return SIM900CardService::SIM900_CARD_SERVICE_ASYNC;
+    else
+        return static_cast<SIM900CardService>(i);
+}
+
 /**
  * 
  * @enum SIM900PhonebookType