From ca9d606e72fac237f204e27f5ddb4ad10f000ae4 Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <github@benoitblanchon.fr>
Date: Wed, 25 Feb 2015 22:27:30 +0100
Subject: [PATCH] Added example JsonUdpBeacon

---
 examples/JsonUdpBeacon/JsonUdpBeacon.ino | 55 ++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 examples/JsonUdpBeacon/JsonUdpBeacon.ino

diff --git a/examples/JsonUdpBeacon/JsonUdpBeacon.ino b/examples/JsonUdpBeacon/JsonUdpBeacon.ino
new file mode 100644
index 00000000..e1f54e88
--- /dev/null
+++ b/examples/JsonUdpBeacon/JsonUdpBeacon.ino
@@ -0,0 +1,55 @@
+// Send a JSON object on UDP at regular interval
+//
+// You can easily test this program with netcat:
+// $ nc -ulp 8888
+//
+// by Benoit Blanchon, MIT License 2015
+
+#include <SPI.h>
+#include <Ethernet.h>
+#include <ArduinoJson.h>
+
+byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
+IPAddress localIp(192, 168, 0, 177);
+IPAddress remoteIp(192, 168, 0, 109);
+unsigned int remotePort = 8888;
+unsigned localPort = 8888;
+EthernetUDP udp;
+
+JsonObject& buildJson(JsonBuffer& jsonBuffer) {
+  JsonObject& root = jsonBuffer.createObject();
+
+  JsonArray& analogValues = root.createNestedArray("analog");
+  for (int pin = 0; pin < 6; pin++) {
+    int value = analogRead(pin);
+    analogValues.add(value);
+  }
+
+  JsonArray& digitalValues = root.createNestedArray("digital");
+  for (int pin = 0; pin < 14; pin++) {
+    int value = digitalRead(pin);
+    digitalValues.add(value);
+  }
+
+  return root;
+}
+
+void sendJson(JsonObject& json) {
+  udp.beginPacket(remoteIp, remotePort);
+  json.printTo(udp);
+  udp.println();
+  udp.endPacket();
+}
+
+void setup() {
+  Ethernet.begin(mac, localIp);
+  udp.begin(localPort);
+}
+
+void loop() {
+  delay(1000);
+
+  StaticJsonBuffer<300> jsonBuffer;
+  JsonObject& json = buildJson(jsonBuffer);
+  sendJson(json);
+}