Moved modem functions to pre-processor macros

src/TinyGsmClientESP8266.h

@@ -173,18 +173,9 @@ public:
     sendAT(GF("+UART_CUR="), baud, "8,1,0,0");
   }
 
-  bool testAT(unsigned long timeout = 10000L) {
-    for (unsigned long start = millis(); millis() - start < timeout; ) {
-      sendAT(GF(""));
-      if (waitResponse(200) == 1) return true;
-      delay(100);
-    }
-    return false;
-  }
+TINY_GSM_MODEM_TEST_AT()
 
-  void maintain() {
-    waitResponse(10, NULL, NULL);
-  }
+TINY_GSM_MODEM_MAINTAIN_LISTEN()
 
   bool factoryDefault() {
     sendAT(GF("+RESTORE"));
@@ -378,37 +369,7 @@ public:
    Utilities
    */
 
-  template<typename T>
-  void streamWrite(T last) {
-    stream.print(last);
-  }
-
-  template<typename T, typename... Args>
-  void streamWrite(T head, Args... tail) {
-    stream.print(head);
-    streamWrite(tail...);
-  }
-
-  template<typename... Args>
-  void sendAT(Args... cmd) {
-    streamWrite("AT", cmd..., GSM_NL);
-    stream.flush();
-    TINY_GSM_YIELD();
-    //DBG("### AT:", cmd...);
-  }
-
-  bool streamSkipUntil(const char c, const unsigned long timeout = 1000L) {
-    unsigned long startMillis = millis();
-    while (millis() - startMillis < timeout) {
-      while (millis() - startMillis < timeout && !stream.available()) {
-        TINY_GSM_YIELD();
-      }
-      if (stream.read() == c) {
-        return true;
-      }
-    }
-    return false;
-  }
+TINY_GSP_MODEM_STREAM_UTILITIES()
 
   // TODO: Optimize this!
   uint8_t waitResponse(uint32_t timeout, String& data,