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/***************************************************
Adafruit MQTT Library ESP8266 Example
Must use ESP8266 Arduino from:
https://github.com/esp8266/Arduino
Works great with Adafruit's Huzzah ESP board & Feather
----> https://www.adafruit.com/product/2471
----> https://www.adafruit.com/products/2821
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Tony DiCola for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
#include <Wire.h>
#include "SSD1306.h"
SSD1306 display(0x3C, D2, D5); //Address set here 0x3C that I found in the scanner, and pins defined as D2 (SDA/Serial Data), and D5 (SCK/Serial Clock).
/************************* WiFi Access Point *********************************/
#define WLAN_SSID "secret"
#define WLAN_PASS "secret"
/************************* Adafruit.io Setup *********************************/
#define AIO_SERVER "io.adafruit.com"
#define AIO_SERVERPORT 1883 // use 8883 for SSL
#define AIO_USERNAME "secret"
#define AIO_KEY "secret"
/************ Global State (you don't need to change this!) ******************/
// Create an ESP8266 WiFiClient class to connect to the MQTT server.
WiFiClient client;
// or... use WiFiClientSecure for SSL
//WiFiClientSecure client;
// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
/****************************** Feeds ***************************************/
// Setup a feed called 'photocell' for publishing.
// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
Adafruit_MQTT_Subscribe ShortText = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/ShortText");
/*************************** Sketch Code ************************************/
// Bug workaround for Arduino 1.6.6, it seems to need a function declaration
// for some reason (only affects ESP8266, likely an arduino-builder bug).
void MQTT_connect();
void setup() {
Serial.begin(115200);
delay(10);
Serial.println(F("Adafruit MQTT demo"));
// Connect to WiFi access point.
Serial.println(); Serial.println();
Serial.print("Connecting to ");
Serial.println(WLAN_SSID);
WiFi.begin(WLAN_SSID, WLAN_PASS);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println();
Serial.println("WiFi connected");
Serial.println("IP address: "); Serial.println(WiFi.localIP());
// Setup MQTT subscription for onoff feed.
mqtt.subscribe(&ShortText);
}
uint32_t x = 0;
void loop() {
// 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();
// this is our 'wait for incoming subscription packets' busy subloop
// try to spend your time here
Adafruit_MQTT_Subscribe *subscription;
while ((subscription = mqtt.readSubscription(5000))) {
if (subscription == &ShortText) {
String lastread = (char *)ShortText.lastread;
display.clear();
display.drawString(0, 0, "Hello world " + String(lastread));
display.display();
}
}
// ping the server to keep the mqtt connection alive
// NOT required if you are publishing once every KEEPALIVE seconds
/*
if(! mqtt.ping()) {
mqtt.disconnect();
}
*/
}
// 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... ");
uint8_t retries = 3;
while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
Serial.println(mqtt.connectErrorString(ret));
Serial.println("Retrying MQTT connection in 5 seconds...");
mqtt.disconnect();
delay(5000); // wait 5 seconds
retries--;
if (retries == 0) {
// basically die and wait for WDT to reset me
while (1);
}
}
Serial.println("MQTT Connected!");
}
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//Here we show the LongText instead of the ShortText
//Clear display
display.clearDisplay();
//Displaying the "Danni Alert" message on the screen
display.drawBitmap(0, 17, myBitmap, 128, 64, BLACK, WHITE);
//"verify" the screen
display.display();
delay(2000);
//Clear display
display.clearDisplay();
//Set text size
display.setTextSize(1);
//Set text color
display.setTextColor(WHITE);
//Set text location
display.setCursor(0, 0);
//Show found text from MQTT
display.print(F(""));
//Show found text from MQTT
display.println((char *)LongText.lastread);
//"verify" the screen
display.display();
//Clear display
display.clearDisplay();
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0x40204466: String::String(char const*) at C:\Users\ikdan\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\WString.cpp line 36
0x4020144b: loop() at C:\Users\ikdan\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266/WString.h line 330
0x4020406c: Print::println(Printable const&) at C:\Users\ikdan\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\Print.cpp line 246
0x40100154: ets_post(uint8, ETSSignal, ETSParam) at C:\Users\ikdan\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_main.cpp line 177
0x402048ac: loop_wrapper() at C:\Users\ikdan\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\cores\esp8266\core_esp8266_main.cpp line 197