mirror of https://github.com/arendst/Tasmota.git
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/*
|
|
Basic MQTT example
|
|
|
|
This sketch demonstrates the basic capabilities of the library.
|
|
It connects to an MQTT server then:
|
|
- publishes "hello world" to the topic "outTopic"
|
|
- subscribes to the topic "inTopic", printing out any messages
|
|
it receives. NB - it assumes the received payloads are strings not binary
|
|
|
|
It will reconnect to the server if the connection is lost using a blocking
|
|
reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to
|
|
achieve the same result without blocking the main loop.
|
|
|
|
*/
|
|
|
|
#include <SPI.h>
|
|
#include <Ethernet.h>
|
|
#include <PubSubClient.h>
|
|
|
|
// Update these with values suitable for your network.
|
|
byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };
|
|
IPAddress ip(172, 16, 0, 100);
|
|
IPAddress server(172, 16, 0, 2);
|
|
|
|
void callback(char* topic, byte* payload, unsigned int length) {
|
|
Serial.print("Message arrived [");
|
|
Serial.print(topic);
|
|
Serial.print("] ");
|
|
for (int i=0;i<length;i++) {
|
|
Serial.print((char)payload[i]);
|
|
}
|
|
Serial.println();
|
|
}
|
|
|
|
EthernetClient ethClient;
|
|
PubSubClient client(ethClient);
|
|
|
|
void reconnect() {
|
|
// Loop until we're reconnected
|
|
while (!client.connected()) {
|
|
Serial.print("Attempting MQTT connection...");
|
|
// Attempt to connect
|
|
if (client.connect("arduinoClient")) {
|
|
Serial.println("connected");
|
|
// Once connected, publish an announcement...
|
|
client.publish("outTopic","hello world");
|
|
// ... and resubscribe
|
|
client.subscribe("inTopic");
|
|
} else {
|
|
Serial.print("failed, rc=");
|
|
Serial.print(client.state());
|
|
Serial.println(" try again in 5 seconds");
|
|
// Wait 5 seconds before retrying
|
|
delay(5000);
|
|
}
|
|
}
|
|
}
|
|
|
|
void setup()
|
|
{
|
|
Serial.begin(57600);
|
|
|
|
client.setServer(server, 1883);
|
|
client.setCallback(callback);
|
|
|
|
Ethernet.begin(mac, ip);
|
|
// Allow the hardware to sort itself out
|
|
delay(1500);
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
if (!client.connected()) {
|
|
reconnect();
|
|
}
|
|
client.loop();
|
|
}
|