add NTP and DNS examples

Author: chavee

.gitignore

@@ -0,0 +1 @@
+.DS_Store

Examples/.DS_Store

@@ -0,0 +1,34 @@
+#include <Arduino.h>
+#include <AltSoftSerial.h>
+#include "Dns.h"
+
+AltSoftSerial bc95serial;
+
+DNSClient dns;
+IPAddress remoteip;
+
+void setup() {
+    bc95serial.begin(9600);
+    BC95.begin(bc95serial);
+    BC95.reset();
+
+    Serial.begin(9600);
+    Serial.println(F("Starting..."));
+
+    while (!BC95.attachNetwork()) {
+        Serial.println("...");
+        delay(1000);
+    }
+    Serial.println(F("NB-IOT attached.."));
+
+    dns.begin();
+    dns.getHostByName("gogole.com", remoteip);
+
+    Serial.print("The resolved IP address is : ");
+    Serial.println(remoteip);
+}
+
+void loop() {
+  
+}
+

Examples/DNSResolve/DNSResolve.ino

@@ -0,0 +1,33 @@
+#include <Arduino.h>
+#include <AltSoftSerial.h>
+#include "NTPClient.h"
+
+AltSoftSerial bc95serial;
+
+BC95UDP udp;
+NTPClient ntpclient(udp);
+
+void setup() {
+    bc95serial.begin(9600);
+    BC95.begin(bc95serial);
+    BC95.reset();
+
+    Serial.begin(9600);
+    Serial.println(F("Starting..."));
+
+    while (!BC95.attachNetwork()) {
+        Serial.println("...");
+        delay(1000);
+    }
+    Serial.println(F("NB-IOT attached.."));
+
+    ntpclient.begin();
+    ntpclient.update();
+    Serial.print("The current GMT time is : ");
+    Serial.println(ntpclient.getFormattedTime());
+}
+
+void loop() {
+  
+}
+

Examples/NTPClient/NTPClient.ino

@@ -12,7 +12,7 @@ class NTPClient {
     BC95UDP*          _udp;
     bool          _udpSetup       = false;
 
-    const char*   _poolServerName = "pool.ntp.org";
+    const char*   _poolServerName = NTP_DEFAULT_SERVER;
     int           _port           = NTP_DEFAULT_LOCAL_PORT;
     long          _timeOffset     = 0;
 

NTPClient.h

@@ -3,7 +3,7 @@ version=0.8.0
 author=Chavee Issariyapat <[email protected]>
 maintainer=Chavee Issariyapat <[email protected]>
 sentence=A network library for BC95 NB-IOT module on Arduino platform.
-paragraph=This library transforms AT-commands on BC95 NB-IOT module into a familiar arduino UDP functions. The UDP protocols like CoAP, DNS and NTP are also included.
+paragraph=This library transforms AT-commands on BC95 NB-IOT module into a familiar arduino UDP functions. Application protocols based on UDP like CoAP, DNS and NTP are also included.
 category=Communication
 url=https://github.com/nexpie/bc95-arduino
-architectures=arduino
+architectures=avr

library.properties

@@ -20,6 +20,8 @@ This software is released under the MIT License.
 #define DNS_MAX_RETRY                   5
 #define DNS_DEFAULT_SERVER              IPAddress(8,8,8,8)
 
+#define NTP_DEFAULT_SERVER              "time.nist.gov"
+
 #define COAP_ENABLE_ACK_CALLBACK        0
 
 #endif