83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
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* KiteLib ESP8266 MQTT Publish Example
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*
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* This example publishes MQTT messages using ESP8266 WiFi module.
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*
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* The messages are published to https://shiftr.io/try. You can use this namespace
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* for testing purposes, but remember that it is publicly accessible!
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*
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* IMPORTANT: Before uploading this example, make sure that the ESP8266 module is running
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* AT firmware (can be found in the /extras folder of the library)!
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*/
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// include the library
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#include <KiteLib.h>
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// ESP8266 module is in slot A on the shield
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ESP8266 wifi = Kite.ModuleA;
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// create MQTT client instance using the wifi module
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// the default port used for MQTT is 1883
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MQTTClient mqtt(&wifi, 1883);
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void setup() {
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Serial.begin(9600);
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// initialize ESP8266
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Serial.print(F("[ESP8266] Initializing ... "));
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// baudrate: 9600 baud
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byte state = wifi.begin(9600);
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if(state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code 0x"));
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Serial.println(state, HEX);
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while(true);
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}
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// join access point
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Serial.print(F("[ESP8266] Joining AP ... "));
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// name: SSID
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// password: password
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state = wifi.join("SSID", "password");
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if(state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code 0x"));
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Serial.println(state, HEX);
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while(true);
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}
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// connect to MQTT server
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Serial.print(F("[ESP8266] Connecting to MQTT server ... "));
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// server URL: broker.shiftr.io
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// client ID: arduino
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// username: try
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// password: try
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state = mqtt.connect("broker.shiftr.io", "arduino", "try", "try");
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if(state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code 0x"));
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Serial.println(state, HEX);
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while(true);
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}
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}
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void loop() {
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// publish MQTT message
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Serial.print(F("[ESP8266] Publishing MQTT message ... "));
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// topic name: hello
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// application message: world
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byte state = mqtt.publish("hello", "world");
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if(state == ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code 0x"));
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Serial.println(state, HEX);
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}
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// wait for a second before publishing again
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delay(1000);
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}
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