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mirror of https://github.com/adafruit/Adafruit_MQTT_Library.git synced 2025-07-29 02:02:00 +03:00

Add connected() function to MQTT class. Update examples with robust reconnect logic.

This commit is contained in:
Tony DiCola
2015-07-05 14:29:13 -07:00
parent 207bcd44dd
commit 643c906aa6
7 changed files with 148 additions and 93 deletions

View File

@ -1,14 +1,14 @@
/***************************************************
/***************************************************
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
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
#include <Adafruit_SleepyDog.h>
@ -30,7 +30,7 @@
#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,
#define WLAN_SECURITY WLAN_SEC_WPA2 // Can be: WLAN_SEC_UNSEC, WLAN_SEC_WEP,
// WLAN_SEC_WPA or WLAN_SEC_WPA2
/************************* Adafruit.io Setup *********************************/
@ -64,12 +64,12 @@ boolean CC3000connect(const char* wlan_ssid, const char* wlan_pass, uint8_t wlan
/****************************** Feeds ***************************************/
// Setup a feed called 'photocell' for publishing.
// Setup a feed called 'photocell' for publishing.
// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
const char PHOTOCELL_FEED[] PROGMEM = AIO_USERNAME "/feeds/photocell";
Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, PHOTOCELL_FEED);
// Setup a feed called 'onoff' for subscribing to changes.
// Setup a feed called 'onoff' for subscribing to changes.
const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff";
Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED);
@ -84,7 +84,7 @@ void setup() {
// Initialise the CC3000 module
Serial.print(F("\nInit the CC3000..."));
if (!cc3000.begin())
if (!cc3000.begin())
halt("Failed");
mqtt.subscribe(&onoffbutton);
@ -93,31 +93,6 @@ void setup() {
Serial.println(F("Retrying WiFi"));
while(1);
}
Serial.println(F("Connected to WiFi!"));
//////////////////////////////
Serial.println(F("Connecting to MQTT..."));
int8_t ret;
while ((ret = mqtt.connect()) != 0) {
switch (ret) {
case 1: Serial.println(F("Wrong protocol")); break;
case 2: Serial.println(F("ID rejected")); break;
case 3: Serial.println(F("Server unavail")); break;
case 4: Serial.println(F("Bad user/pass")); break;
case 5: Serial.println(F("Not authed")); break;
case 6: Serial.println(F("Failed to subscribe")); break;
default: {
Serial.println(F("Connection failed"));
CC3000connect(WLAN_SSID, WLAN_PASS, WLAN_SECURITY); // y0w, lets connect to wifi again
return; // restart the loop
}
}
Serial.println(F("Retrying MQTT connection"));
delay(5000);
}
//////////////////////////////
Serial.println(F("MQTT Connected!"));
}
uint32_t x=0;
@ -125,6 +100,11 @@ uint32_t x=0;
void loop() {
// Make sure to reset watchdog every loop iteration!
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();
// Try to ping the MQTT server
/*
@ -140,13 +120,13 @@ void loop() {
Adafruit_MQTT_Subscribe *subscription;
while (subscription = mqtt.readSubscription(1000)) {
if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
Serial.print(F("Got: "));
Serial.println((char *)onoffbutton.lastread);
}
}
// Now we can publish stuff!
Serial.print(F("\nSending photocell val "));
Serial.print(F("\nSending photocell val "));
Serial.print(x);
Serial.print("...");
if (! photocell.publish(x++)) {
@ -155,3 +135,35 @@ void loop() {
Serial.println(F("OK!"));
}
}
// 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
switch (ret) {
case 1: Serial.println("Wrong protocol"); break;
case 2: Serial.println("ID rejected"); break;
case 3: Serial.println("Server unavailable"); break;
case 4: Serial.println("Bad user/password"); break;
case 5: Serial.println("Not authenticated"); break;
case 6: Serial.println("Failed to subscribe"); break;
default:
Serial.println(F("Connection failed"));
CC3000connect(WLAN_SSID, WLAN_PASS, WLAN_SECURITY); // y0w, lets connect to wifi again
break;
}
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds
}
Serial.println("MQTT Connected!");
}