Adafruit_MQTT_Library/examples/mqtt_cc3k/mqtt_cc3k.ino

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/***************************************************
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Adafruit MQTT Library CC3000 Example
Designed specifically to work with the Adafruit WiFi products:
----> https://www.adafruit.com/products/1469
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
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MIT license, all text above must be included in any redistribution
****************************************************/
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#include <Adafruit_SleepyDog.h>
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#include <Adafruit_CC3000.h>
#include <SPI.h>
#include "utility/debug.h"
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_CC3000.h"
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/*************************** CC3000 Pins ***********************************/
#define ADAFRUIT_CC3000_IRQ 3 // MUST be an interrupt pin!
#define ADAFRUIT_CC3000_VBAT 5 // VBAT & CS can be any digital pins.
#define ADAFRUIT_CC3000_CS 10
// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11
/************************* WiFi Access Point *********************************/
#define WLAN_SSID "...your SSID..." // can't be longer than 32 characters!
#define WLAN_PASS "...your password..."
#define WLAN_SECURITY WLAN_SEC_WPA2 // Can be: WLAN_SEC_UNSEC, WLAN_SEC_WEP,
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// WLAN_SEC_WPA or WLAN_SEC_WPA2
/************************* Adafruit.io Setup *********************************/
#define AIO_SERVER "io.adafruit.com"
#define AIO_SERVERPORT 1883
#define AIO_USERNAME "...your AIO username (see https://accounts.adafruit.com)..."
#define AIO_KEY "...your AIO key..."
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/************ Global State (you don't need to change this!) ******************/
// Setup the main CC3000 class, just like a normal CC3000 sketch.
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT);
// Store the MQTT server, username, and password in flash memory.
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// This is required for using the Adafruit MQTT library.
const char MQTT_SERVER[] PROGMEM = AIO_SERVER;
const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME;
const char MQTT_PASSWORD[] PROGMEM = AIO_KEY;
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// Setup the CC3000 MQTT class by passing in the CC3000 class and MQTT server and login details.
Adafruit_MQTT_CC3000 mqtt(&cc3000, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD);
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// You don't need to change anything below this line!
#define halt(s) { Serial.println(F( s )); while(1); }
// CC3000connect is a helper function that sets up the CC3000 and connects to
// the WiFi network. See the cc3000helper.cpp tab above for the source!
boolean CC3000connect(const char* wlan_ssid, const char* wlan_pass, uint8_t wlan_security);
/****************************** Feeds ***************************************/
// Setup a feed called 'photocell' for publishing.
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// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
const char PHOTOCELL_FEED[] PROGMEM = AIO_USERNAME "/feeds/photocell";
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Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, PHOTOCELL_FEED);
// Setup a feed called 'onoff' for subscribing to changes.
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const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff";
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Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED);
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/*************************** Sketch Code ************************************/
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void setup() {
Serial.begin(115200);
Serial.println(F("Adafruit MQTT demo"));
Serial.print(F("Free RAM: ")); Serial.println(getFreeRam(), DEC);
// Initialise the CC3000 module
Serial.print(F("\nInit the CC3000..."));
if (!cc3000.begin())
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halt("Failed");
mqtt.subscribe(&onoffbutton);
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while (! CC3000connect(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
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Serial.println(F("Retrying WiFi"));
delay(1000);
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}
}
uint32_t x=0;
void loop() {
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// Make sure to reset watchdog every loop iteration!
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Watchdog.reset();
// Ensure the connection to the MQTT server is alive (this will make the first
// connection and automatically reconnect when disconnected). See the MQTT_connect
// function definition further below.
MQTT_connect();
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// this is our 'wait for incoming subscription packets' busy subloop
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Adafruit_MQTT_Subscribe *subscription;
while ((subscription = mqtt.readSubscription(1000))) {
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if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
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Serial.println((char *)onoffbutton.lastread);
}
}
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// Now we can publish stuff!
Serial.print(F("\nSending photocell val "));
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Serial.print(x);
Serial.print("...");
if (! photocell.publish(x++)) {
Serial.println(F("Failed"));
} else {
Serial.println(F("OK!"));
}
// ping the server to keep the mqtt connection alive
if(! mqtt.ping()) {
Serial.println(F("MQTT Ping failed."));
}
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}
// Function to connect and reconnect as necessary to the MQTT server.
// Should be called in the loop function and it will take care if connecting.
void MQTT_connect() {
int8_t ret;
// Stop if already connected.
if (mqtt.connected()) {
return;
}
Serial.print("Connecting to MQTT... ");
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
Serial.println(mqtt.connectErrorString(ret));
if (ret < 0)
CC3000connect(WLAN_SSID, WLAN_PASS, WLAN_SECURITY); // y0w, lets connect to wifi again
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds
}
Serial.println("MQTT Connected!");
}