Many sub templates to inherit from!

src/TinyGsmCalling.tpp

@@ -0,0 +1,90 @@
+/**
+ * @file       TinyGsmCalling.tpp
+ * @author     Volodymyr Shymanskyy
+ * @license    LGPL-3.0
+ * @copyright  Copyright (c) 2016 Volodymyr Shymanskyy
+ * @date       Nov 2016
+ */
+
+#ifndef SRC_TINYGSMCALLING_H_
+#define SRC_TINYGSMCALLING_H_
+
+#include "TinyGsmCommon.h"
+
+#define TINY_GSM_MODEM_HAS_CALLING
+
+template <class modemType>
+class TinyGsmCalling {
+ public:
+  /*
+   * Phone Call functions
+   */
+  bool callAnswer() {
+    return thisModem().callAnswerImpl();
+  }
+  bool callNumber(const String& number) {
+    return thisModem().callNumberImpl(number);
+  }
+  bool callHangup() {
+    return thisModem().callHangupImpl();
+  }
+  bool dtmfSend(char cmd, int duration_ms = 100) {
+    return thisModem().dtmfSendImpl(cmd, duration_ms);
+  }
+
+  /*
+   * CRTP Helper
+   */
+ protected:
+  inline const modemType& thisModem() const {
+    return static_cast<const modemType&>(*this);
+  }
+  inline modemType& thisModem() {
+    return static_cast<modemType&>(*this);
+  }
+
+  /*
+   * Phone Call functions
+   */
+ protected:
+  bool callAnswerImpl() {
+    thisModem().sendAT(GF("A"));
+    return thisModem().waitResponse() == 1;
+  }
+
+  // Returns true on pick-up, false on error/busy
+  bool callNumberImpl(const String& number) {
+    if (number == GF("last")) {
+      thisModem().sendAT(GF("DL"));
+    } else {
+      thisModem().sendAT(GF("D"), number, ";");
+    }
+    int status = thisModem().waitResponse(60000L, GF("OK"), GF("BUSY"),
+                                          GF("NO ANSWER"), GF("NO CARRIER"));
+    switch (status) {
+      case 1: return true;
+      case 2:
+      case 3: return false;
+      default: return false;
+    }
+  }
+
+  bool callHangupImpl() {
+    thisModem().sendAT(GF("H"));
+    return thisModem().waitResponse() == 1;
+  }
+
+  // 0-9,*,#,A,B,C,D
+  bool dtmfSendImpl(char cmd, int duration_ms = 100) {
+    duration_ms = constrain(duration_ms, 100, 1000);
+
+    thisModem().sendAT(GF("+VTD="),
+                       duration_ms / 100);  // VTD accepts in 1/10 of a second
+    thisModem().waitResponse();
+
+    thisModem().sendAT(GF("+VTS="), cmd);
+    return thisModem().waitResponse(10000L) == 1;
+  }
+};
+
+#endif  // SRC_TINYGSMCALLING_H_