timeFunc

Author: Blend3rman

simplestesp8266clock/simplestesp8266clock.ino

@@ -0,0 +1,148 @@
+
+#include <SSD1306.h>
+
+// simplestesp8266clock.ino
+//
+// Libraries needed:
+//  Time.h & TimeLib.h:  https://github.com/PaulStoffregen/Time
+//  Timezone.h: https://github.com/JChristensen/Timezone
+//  SSD1306.h & SSD1306Wire.h:  https://github.com/squix78/esp8266-oled-ssd1306
+//  NTPClient.h: https://github.com/arduino-libraries/NTPClient
+//  ESP8266WiFi.h & WifiUDP.h: https://github.com/ekstrand/ESP8266wifi
+//
+// 128x64 OLED pinout:
+// GND goes to ground
+// Vin goes to 3.3V
+// Data to I2C SDA (GPIO 0)
+// Clk to I2C SCL (GPIO 2)
+
+#include <ESP8266WiFi.h>
+
+#include <WifiUDP.h>
+#include <String.h>
+#include <Wire.h>
+#include <NTPClient.h>
+#include <Time.h>
+#include <TimeLib.h>
+#include <Timezone.h>
+
+// Define NTP properties
+#define NTP_OFFSET   60 * 60      // In seconds
+#define NTP_INTERVAL 60 * 1000    // In miliseconds
+#define NTP_ADDRESS  "in.pool.ntp.org"  // change this to whatever pool is closest (see ntp.org)
+
+// Set up the NTP UDP client
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP, NTP_ADDRESS, NTP_OFFSET, NTP_INTERVAL);
+
+// Create a display object
+SSD1306  display(0x3c, 5, 4); //0x3d for the Adafruit 1.3" OLED, 0x3C being the usual address of the OLED
+ 
+const char* ssid = "";   // insert your own ssid 
+const char* password = "";              // and password
+String date;
+String t;
+const char * days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"} ;
+const char * months[] = {"Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sep", "Oct", "Nov", "Dec"} ;
+const char * ampm[] = {"AM", "PM"} ;
+ 
+void setup () 
+{
+  Serial.begin(115200); // most ESP-01's use 115200 but this could vary
+  timeClient.begin();   // Start the NTP UDP client
+
+  Wire.pins(5, 4);  // Start the OLED with GPIO 0 and 2 on ESP-01
+  Wire.begin(5, 4); // 0=sda, 2=scl
+  display.init();
+  display.flipScreenVertically();   
+
+  // Connect to wifi
+  Serial.println("");
+  Serial.print("Connecting to ");
+  Serial.print(ssid);
+  display.drawString(0, 10, "Connecting to Wifi...");
+  display.display();
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) 
+  {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.print("Connected to WiFi at ");
+  Serial.print(WiFi.localIP());
+  Serial.println("");
+  display.drawString(0, 24, "Connected.");
+  display.display();
+  delay(1000);
+}
+
+void loop() 
+{
+  if (WiFi.status() == WL_CONNECTED) //Check WiFi connection status
+  {   
+    date = "";  // clear the variables
+    t = "";
+    
+    // update the NTP client and get the UNIX UTC timestamp 
+    timeClient.update();
+    unsigned long epochTime =  timeClient.getEpochTime();
+
+    // convert received time stamp to time_t object
+    time_t local, utc;
+    utc = epochTime;
+
+    // Then convert the UTC UNIX timestamp to local time
+    
+    TimeChangeRule IST = {"IST", First, Mon, Jan, 0, 270};   //UTC - 6 hours - change this as needed
+    Timezone inST(IST, IST);
+    local = inST.toLocal(utc);
+
+    // now format the Time variables into strings with proper names for month, day etc
+    date += days[weekday(local)-1];
+    date += ", ";
+    date += months[month(local)-1];
+    date += " ";
+    date += day(local);
+    date += ", ";
+    date += year(local);
+
+    // format the time to 12-hour format with AM/PM and no seconds
+    t += hourFormat12(local);
+    t += ":";
+    if(minute(local) < 10)  // add a zero if minute is under 10
+      t += "0";
+    t += minute(local);
+    t += " ";
+    t += ampm[isPM(local)];
+
+    // Display the date and time
+    Serial.println("");
+    Serial.print("Local date: ");
+    Serial.print(date);
+    Serial.println("");
+    Serial.print("Local time: ");
+    Serial.print(t);
+
+    // print the date and time on the OLED
+    display.clear();
+    display.setTextAlignment(TEXT_ALIGN_CENTER);
+    display.setFont(ArialMT_Plain_24);
+    display.drawStringMaxWidth(64, 10, 128, t);
+    display.setFont(ArialMT_Plain_10);
+    display.drawStringMaxWidth(64, 38, 128, date);
+    display.display();
+  }
+  else // attempt to connect to wifi again if disconnected
+  {
+    display.clear();
+    display.drawString(0, 10, "Connecting to Wifi...");
+    display.display();
+    WiFi.begin(ssid, password);
+    display.drawString(0, 24, "Connected.");
+    display.display();
+    delay(1000);
+  }
+    
+  delay(10000);    //Send a request to update every 10 sec (= 10,000 ms)
+}