add UDPClient example

Author: chavee

BC95.cpp

@@ -6,7 +6,6 @@ E-mail: [email protected]
 This software is released under the MIT License.
 */
 
-
 #include "BC95.h"
 
 char buffer[BC95_MAX_BUFFER_SIZE];
@@ -61,7 +60,7 @@ char* BC95Class::getSerialResponse(char *prefix, uint32_t timeout) {
                 socketpool[sno].bc95_msglen = plen;
 
             // if +NSONMI is unexpectly found, read serial again
-            if (readUntilDone(buffer, timeout, BC95_MAX_BUFFER_SIZE) >= 0) {   // 0
+            if (readUntilDone(buffer, timeout, BC95_MAX_BUFFER_SIZE) >= 0) {
                 return parseResponse(buffer, prefix);
             }
             else {
@@ -89,7 +88,7 @@ char* BC95Class::parseResponse(char *rawstr, char* pref) {
     if (pref==NULL || *pref=='\0') {
         return rawstr;
     }
-	p = strstr((const char *)rawstr, (const char *)pref);
+    p = strstr((const char *)rawstr, (const char *)pref);
     if (p != NULL) {
 		p += strlen(pref);
         // skip STOPPER[0]

Examples/UDPClient/UDPClient.ino

@@ -0,0 +1,71 @@
+#include <Arduino.h>
+#include <AltSoftSerial.h>
+#include "BC95Udp.h"
+
+AltSoftSerial bc95serial;
+
+// 8.8.8.8 is the Google's public DNS server.
+#define SERVER_IP     IPAddress(8, 8, 8, 8)
+#define SERVER_PORT   53
+
+// This binary string represents a UDP paylaod of the DNS query for the domain name nexpie.com
+uint8_t udpdata[] = "\xC0\x5B\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x06\x6E\x65\x78\x70\x69\x65\x03\x63\x6F\x6D\x00\x00\x01\x00\x01";
+
+
+BC95UDP udpclient;
+uint8_t buff[64];
+
+void printHEX(uint8_t *buff, size_t len) {
+    for (int i=0; i<len; i++) {
+        if (buff[i]<16) Serial.print(" 0");
+        else Serial.print(" ");
+        Serial.print(buff[i], HEX);
+    }
+}
+
+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.."));
+
+    Serial.print(F("NB-IOT module IP address : "));
+    Serial.println(BC95.getIPAddress());
+
+    udpclient.begin(8053);
+    udpclient.beginPacket(SERVER_IP, SERVER_PORT);
+
+    Serial.println("\n\nSending UDP payload : ");
+    Serial.println(F("                                         n  e  x  p  i  e     c  o  m        A    IN"));
+    printHEX(udpdata, 28);
+    
+    udpclient.write(udpdata, 28);
+    udpclient.endPacket();
+
+    while (udpclient.parsePacket() == 0) {
+        delay(500);
+    }
+
+    size_t len = udpclient.read(buff, 64);
+
+    Serial.println(F("\n\nReceive UDP payload : "));
+    printHEX(buff, len);
+
+    Serial.print(F("\n\nThe last 4 bytes encodes IP address of the requested domain : "));
+
+    IPAddress hostip = IPAddress(buff[len-4], buff[len-3], buff[len-2], buff[len-1]);
+    Serial.print(hostip);
+}
+
+void loop() {
+  
+}
+