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// 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 | ||
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#include <SPI.h> | ||
#include <Ethernet.h> | ||
#include <ArduinoJson.h> | ||
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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; | ||
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JsonObject& buildJson(JsonBuffer& jsonBuffer) { | ||
JsonObject& root = jsonBuffer.createObject(); | ||
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JsonArray& analogValues = root.createNestedArray("analog"); | ||
for (int pin = 0; pin < 6; pin++) { | ||
int value = analogRead(pin); | ||
analogValues.add(value); | ||
} | ||
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JsonArray& digitalValues = root.createNestedArray("digital"); | ||
for (int pin = 0; pin < 14; pin++) { | ||
int value = digitalRead(pin); | ||
digitalValues.add(value); | ||
} | ||
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return root; | ||
} | ||
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void sendJson(JsonObject& json) { | ||
udp.beginPacket(remoteIp, remotePort); | ||
json.printTo(udp); | ||
udp.println(); | ||
udp.endPacket(); | ||
} | ||
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void setup() { | ||
Ethernet.begin(mac, localIp); | ||
udp.begin(localPort); | ||
} | ||
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void loop() { | ||
delay(1000); | ||
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StaticJsonBuffer<300> jsonBuffer; | ||
JsonObject& json = buildJson(jsonBuffer); | ||
sendJson(json); | ||
} |