Stap 3: Het uploaden van de Code - Kopieer en plak de code in je Arduino IDE
<p>#include "Adafruit_MQTT.h" // Adafruit MQTT library<br>#include "Adafruit_MQTT_Client.h" // Adafruit MQTT library</p><p>#include "ESP8266WiFi.h" // ESP8266 library #include <Adafruit_ssd1306syp.h>> // Adafruit Oled library for display</p><p>#include <TinyGPS++.h > // Tiny GPS Plus Library</p><p>#include <SoftwareSerial.h> // Software Serial Library so we can use Pins for communication with the GPS module</p><p>#define SDA_PIN 4 // uses GPIO pins 4(SDA) and 5(SCL) of the ESP8266 Adafruit Feather #define SCL_PIN 5 // also known as pins D1(SCL) and D2(SDA) of the NodeMCU ESP-12 Adafruit_ssd1306syp display(SDA_PIN,SCL_PIN); // Set OLED display pins</p><p>static const int RXPin = 12, TXPin = 13; // Ublox 6m GPS module to pins 12 and 13 static const uint32_t GPSBaud = 9600; // Ublox GPS default Baud Rate is 9600</p><p>TinyGPSPlus gps; // Create an Instance of the TinyGPS++ object called gps SoftwareSerial ss(RXPin, TXPin); // The serial connection to the GPS device</p><p>const double HOME_LAT = **.******; // Enter Your Latitude and Longitude here const double HOME_LNG = -**.******; // to track how far away the "Dog" is away from Home </p><p>/************************* WiFi Access Point *********************************/</p><p>#define WLAN_SSID "********" // Enter Your router SSID #define WLAN_PASS "**********" // Enter Your router Password</p><p>/************************* Adafruit.io Setup *********************************/</p><p>#define AIO_SERVER "io.adafruit.com" #define AIO_SERVERPORT 1883 // use 8883 for SSL #define AIO_USERNAME "********" // Enter Your Adafruit IO Username #define AIO_KEY "********************************" // Enter Your Adafruit IO Key</p><p>/************ Global State (you don't need to change this!) ******************/</p><p>WiFiClient client; // Create an ESP8266 WiFiClient class to connect to the MQTT server.</p><p>const char MQTT_SERVER[] PROGMEM = AIO_SERVER; // Store the MQTT server, username, and password in flash memory. const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME; const char MQTT_PASSWORD[] PROGMEM = AIO_KEY;</p><p>// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details. Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD);</p><p>/****************************** Feeds ***************************************</p><p>/ Setup a feed called 'gpslat' for publishing. // Notice MQTT paths for AIO follow the form: /feeds/ // This feed is not needed, only setup if you want to see it const char gpslat_FEED[] PROGMEM = AIO_USERNAME "/feeds/gpslat"; Adafruit_MQTT_Publish gpslat = Adafruit_MQTT_Publish(&mqtt, gpslat_FEED);</p><p>// Setup a feed called 'gpslng' for publishing. // Notice MQTT paths for AIO follow the form: /feeds/ // This feed is not needed, only setup if you want to see it const char gpslng_FEED[] PROGMEM = AIO_USERNAME "/feeds/gpslng"; Adafruit_MQTT_Publish gpslng = Adafruit_MQTT_Publish(&mqtt, gpslng_FEED);</p><p>// Setup a feed called 'gps' for publishing. // Notice MQTT paths for AIO follow the form: /feeds/ const char gps_FEED[] PROGMEM = AIO_USERNAME "/feeds/gpslatlng/csv"; // CSV = commas seperated values Adafruit_MQTT_Publish gpslatlng = Adafruit_MQTT_Publish(&mqtt, gps_FEED);</p><p>/****************************************************/</p><p>void setup() { Serial.begin(115200); // Setup Serial Comm for Serial Monitor @ 115200 baud WiFi.mode(WIFI_STA); // Setup ESP8266 as a wifi station WiFi.disconnect(); // Disconnect if needed delay(100); // short delay display.initialize(); // init OLED display display.clear(); // Clear OLED display display.setTextSize(1); // Set OLED text size to small display.setTextColor(WHITE); // Set OLED color to White display.setCursor(0,0); // Set cursor to 0,0 display.println(" Adafruit IO GPS"); display.println(" Tracker"); display.print("---------------------"); display.update(); // Update display delay(1000); // Pause X seconds ss.begin(GPSBaud); // Set Software Serial Comm Speed to 9600 display.print("Connecting to WiFi"); display.update();</p><p> WiFi.begin(WLAN_SSID, WLAN_PASS); // Start a WiFi connection and enter SSID and Password while (WiFi.status() != WL_CONNECTED) { // While waiting on wifi connection, display "..." delay(500); display.print("."); display.update(); } display.println("Connected"); display.update(); } // End Setup</p><p>void loop() {</p><p> smartDelay(500); // Update GPS data TinyGPS needs to be fed often MQTT_connect(); // Run Procedure to connect to Adafruit IO MQTT </p><p> float Distance_To_Home; // variable to store Distance to Home float GPSlat = (gps.location.lat()); // variable to store latitude float GPSlng = (gps.location.lng()); // variable to store longitude float GPSalt = (gps.altitude.feet()); // variable to store altitude Distance_To_Home = (unsigned long)TinyGPSPlus::distanceBetween(gps.location.lat(),gps.location.lng(),HOME_LAT, HOME_LNG); //Query Tiny GPS to Calculate Distance to Home display.clear(); display.setCursor(0,0); display.println(F(" GPS Tracking")); display.print("---------------------"); display.update(); </p><p> display.print("GPS Lat: "); display.println(gps.location.lat(), 6); // Display latitude to 6 decimal points display.print("GPS Lon: "); display.println(gps.location.lng(), 6); // Display longitude to 6 decimal points display.print("Distance: "); display.println(Distance_To_Home); // Distance to Home measured in Meters display.update(); </p><p> // ********************** Combine Data to send to Adafruit IO ********************************* // Here we need to combine Speed, Latitude, Longitude, Altitude into a string variable buffer to send to Adafruit char gpsbuffer[30]; // Combine Latitude, Longitude, Altitude into a buffer of size X char *p = gpsbuffer; // Create a buffer to store GPS information to upload to Adafruit IO </p><p> dtostrf(Distance_To_Home, 3, 4, p); // Convert Distance to Home to a String Variable and add it to the buffer p += strlen(p); p[0] = ','; p++; dtostrf(GPSlat, 3, 6, p); // Convert GPSlat(latitude) to a String variable and add it to the buffer p += strlen(p); p[0] = ','; p++; dtostrf(GPSlng, 3, 6, p); // Convert GPSlng(longitude) to a String variable and add it to the buffer p += strlen(p); p[0] = ','; p++; dtostrf(GPSalt, 2, 1, p); // Convert GPSalt(altimeter) to a String variable and add it to the buffer p += strlen(p); p[0] = 0; // null terminate, end of buffer array</p><p> if ((GPSlng != 0) && (GPSlat != 0)) // If GPS longitude or latitude do not equal zero then Publish { display.println("Sending GPS Data "); display.update(); gpslatlng.publish(gpsbuffer); // publish Combined Data to Adafruit IO Serial.println(gpsbuffer); } gpslng.publish(GPSlng,6); // Publish the GPS longitude to Adafruit IO if (! gpslat.publish(GPSlat,6)) // Publish the GPS latitude to Adafruit IO { display.println(F("Failed")); // If it failed to publish, print Failed } else { //display.println(gpsbuffer); display.println(F("Data Sent!")); } display.update(); delay(1000); if (millis() > 5000 && gps.charsProcessed() < 10) display.println(F("No GPS data received: check wiring")); // Wait a bit before scanning again display.print("Pausing..."); display.update(); smartDelay(500); // Feed TinyGPS constantly delay(1000); }</p><p>// **************** Smart delay - used to feed TinyGPS ****************</p><p>static void smartDelay(unsigned long ms) { unsigned long start = millis(); do { while (ss.available()) gps.encode(ss.read()); } while (millis() - start < ms); }</p><p>// **************** MQTT Connect - connects with Adafruit IO ***************** void MQTT_connect() { int8_t ret; if (mqtt.connected()) { return; } // Stop and return to Main Loop if already connected to Adafruit IO display.print("Connecting to MQTT... "); display.update();</p><p> uint8_t retries = 3; while ((ret = mqtt.connect()) != 0) { // Connect to Adafruit, Adafruit will return 0 if connected display.println(mqtt.connectErrorString(ret)); // Display Adafruits response display.println("Retrying MQTT..."); mqtt.disconnect(); display.update(); delay(5000); // wait X seconds retries--; if (retries == 0) { // basically die and wait for WatchDogTimer to reset me while (1); } } display.println("MQTT Connected!"); display.update(); delay(1000); }</p>
