Added battery status, SMS are sent/received in Text format instead of PDU

examples/example1.cpp

@@ -0,0 +1,71 @@
+/**
+ * ThreadedGSM Example: Read SMS, Network Time and Signal level
+ * Reads SMS messages in PDU mode and prints them to debug serial
+ */
+#include <Arduino.h>
+#define SerialDebug Serial1
+#define SerialModem Serial
+#define THREADEDGSM_DEBUG SerialDebug
+#include <ThreadedGSM.h>
+
+ThreadedGSM SIM900(SerialModem);
+
+void clock(ThreadedGSM& modem, ThreadedGSM::NetworkTime& Time)
+{
+	SerialDebug.print("Modem Time: ");
+	SerialDebug.print(Time.day);
+	SerialDebug.print("/");
+	SerialDebug.print(Time.month);
+	SerialDebug.print("/");
+	SerialDebug.print(Time.year);
+	SerialDebug.print(" ");
+	SerialDebug.print(Time.hour);
+	SerialDebug.print(":");
+	SerialDebug.print(Time.minute);
+	SerialDebug.print(":");
+	SerialDebug.println(Time.second);
+}
+
+void signal(ThreadedGSM& modem, ThreadedGSM::SignalLevel& Signal)
+{
+	SerialDebug.print("Modem signal: Dbm:");
+	SerialDebug.print(Signal.Dbm);
+	SerialDebug.print(" value: ");
+	SerialDebug.println(Signal.Value);
+}
+
+void sms(ThreadedGSM& modem, String& Msg)
+{
+	SerialDebug.print("Received SMS: ");
+	SerialDebug.println(Msg);
+}
+
+void startup(ThreadedGSM& modem)
+{
+	SerialDebug.print("Ready");
+}
+
+void setup()
+{
+	SerialDebug.begin(115200);
+	SerialModem.begin(115200);
+	SerialDebug.println("STARTUP\r\n");
+
+	SIM900.begin();
+	SIM900.setInterval(ThreadedGSM::INTERVAL_CLOCK, 60000);
+	SIM900.setInterval(ThreadedGSM::INTERVAL_SIGNAL, 60000);
+	SIM900.setInterval(ThreadedGSM::INTERVAL_INBOX, 30000);
+	SIM900.setHandlers({
+		.signal = signal,
+		.clock = clock,
+		.incoming = sms,
+		.ready = startup,
+		.outgoing = NULL,
+		.power = NULL
+	});
+}
+
+void loop()
+{
+	SIM900.loop();
+}