Get Epoch Time Automatically and Convert it to Readable Time and Set The Arduino R4 RTC

[@learnelectronics]

/*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^ Uno R4 Wifi Get NTP Time & Set RTC ^
^ Initial author: Sebastian Romero @sebromero ^
^ adapted by learnelectronics 24 Feb 2024 ^
^ ua-cam.com/users/learnelectronics ^
^ Use the code however you like ^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*/
// Include the RTC library
#include "RTC.h"
//Include the NTP library
#include
// Include drivers for OLED
#include
#include
#include
#if defined(ARDUINO_PORTENTA_C33)
#include
#elif defined(ARDUINO_UNOWIFIR4)
#include
#endif
#include
#include "arduino_secrets.h"
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP)
int wifiStatus = WL_IDLE_STATUS;
WiFiUDP Udp; // A UDP instance to let us send and receive packets over UDP
NTPClient timeClient(Udp);
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}
void connectToWiFi(){
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
Serial.println("Please upgrade the firmware");
}
// attempt to connect to WiFi network:
while (wifiStatus != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
wifiStatus = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println("Connected to WiFi");
printWifiStatus();
}
void setup(){
Serial.begin(9600);
while (!Serial);
connectToWiFi();
RTC.begin();
Serial.println("
Starting connection to server...");
timeClient.begin();
timeClient.update();
// Get the current date and time from an NTP server and convert
// it to UTC -5 by passing the time zone offset in hours.
// You may change the time zone offset to your local one.
auto timeZoneOffsetHours = -5;
auto unixTime = timeClient.getEpochTime() + (timeZoneOffsetHours * 3600);
Serial.print("Unix time = ");
Serial.println(unixTime);
RTCTime timeToSet = RTCTime(unixTime);
RTC.setTime(timeToSet);
// Retrieve the date and time from the RTC and print them
RTCTime currentTime;
RTC.getTime(currentTime);
Serial.println("The RTC was just set to: " + String(currentTime));
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
// Show initial display buffer contents on the screen --
// the library initializes this with an Adafruit splash screen.
display.display();
delay(2000); // Pause for 2 seconds
// Clear the buffer
display.clearDisplay();
}
void loop(){
RTCTime currentTime;
RTC.getTime(currentTime);
display.setTextSize(1);
display.setTextColor(SSD1306_WHITE);
display.println(String(currentTime));
display.display();
delay(2000);
//display.clearDisplay();
}

[@warrenking1815]

Pretty neat, a complete clock that gets the info from the internet!

[@davidward9935]

Paul, Great project. I hope you are doing well. I think my next step with the NTP clock would likely be a world clock with programmable zones. I work with people in multiple countries and time zones every day. I would need all of the North American time zones along with Germany, London, Alaska, New Zealand, Australia, and India. Would the OLED have enough lines? I guess I could have it scroll. I would not need seconds, only out to minutes. I think I will have to see what I have in the kit once I find where it is stored again. …Maybe a wall clock? David (ET1, USCGR, Ret.)

[@robertbauer6723]

This is really cool. I have been thinking about creating an "analog clock" simulation with a strip of addressable LEDs wrapped around a circle. Not original I know, it's just my exploration of this. I am thinking about starting with a basic Arduino with no RTC. It will drift for sure. Adding an RTC will probably drift less. Later adding NTP via ESP with WiFi will make it spot-on forever. That got me thinking, why not use just an ESP32, instead of the Arduino/ESP board? Is it a logic level consideration, 5v vs 3.3v? One other idea is to have the ability to set the clock using WWV (in the US) or some other broadcast time signal. I am not sure such a module exists, just spitballing.

[@aliancemd]

It’s unavoidable that it’s going to shift a few seconds from the actual time - that’s one of the reasons we call to NTP servers, we let the big boys with their atomic clocks and GPS(which account for Einstein's theory of relativity/Gravitational time dilation, btw) do the complicated stuff which these tiny devices can’t.

[@larryplatzek9017]

NICE IDEA too bad I could not read the code on your monitor (font small and dark)..

[@MikeBramm]

Looks perfectly readable to me. Were you watching on a phone?

[@larryplatzek9017]

NO on a 15 inch laptop hp Probook 6550b old but works will check on anewer laptop later today.@@MikeBramm

[@learnelectronics]

I'll post it in the comments when I get home later

[@learnelectronics]

/*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^ Uno R4 Wifi Get NTP Time & Set RTC ^
^ Initial author: Sebastian Romero @sebromero ^
^ adapted by learnelectronics 24 Feb 2024 ^
^ ua-cam.com/users/learnelectronics ^
^ Use the code however you like ^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*/
// Include the RTC library
#include "RTC.h"
//Include the NTP library
#include
// Include drivers for OLED
#include
#include
#include
#if defined(ARDUINO_PORTENTA_C33)
#include
#elif defined(ARDUINO_UNOWIFIR4)
#include
#endif
#include
#include "arduino_secrets.h"
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP)
int wifiStatus = WL_IDLE_STATUS;
WiFiUDP Udp; // A UDP instance to let us send and receive packets over UDP
NTPClient timeClient(Udp);
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}
void connectToWiFi(){
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
Serial.println("Please upgrade the firmware");
}
// attempt to connect to WiFi network:
while (wifiStatus != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
wifiStatus = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println("Connected to WiFi");
printWifiStatus();
}
void setup(){
Serial.begin(9600);
while (!Serial);
connectToWiFi();
RTC.begin();
Serial.println("
Starting connection to server...");
timeClient.begin();
timeClient.update();
// Get the current date and time from an NTP server and convert
// it to UTC -5 by passing the time zone offset in hours.
// You may change the time zone offset to your local one.
auto timeZoneOffsetHours = -5;
auto unixTime = timeClient.getEpochTime() + (timeZoneOffsetHours * 3600);
Serial.print("Unix time = ");
Serial.println(unixTime);
RTCTime timeToSet = RTCTime(unixTime);
RTC.setTime(timeToSet);
// Retrieve the date and time from the RTC and print them
RTCTime currentTime;
RTC.getTime(currentTime);
Serial.println("The RTC was just set to: " + String(currentTime));
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
// Show initial display buffer contents on the screen --
// the library initializes this with an Adafruit splash screen.
display.display();
delay(2000); // Pause for 2 seconds
// Clear the buffer
display.clearDisplay();
}
void loop(){
RTCTime currentTime;
RTC.getTime(currentTime);
display.setTextSize(1);
display.setTextColor(SSD1306_WHITE);
display.println(String(currentTime));
display.display();
delay(2000);
//display.clearDisplay();
}

[@larryplatzek9017]

Sorry for not replying sooner power went out and also my internet went out. Thank you for posting the code. went to library still could not read code but today I used a different laptop and was able to read your screen not easy but doable , Thank you!

[@bblod4896]

😮 Software! 😢
☮️ brother

[@learnelectronics]

I know. I know. Everybody hates this ! Ill just go work at McDonalds or the new Duncan donuts they are building in town.

[@bblod4896]

@@learnelectronics
Not true. There are plenty of software people out there. I just get a headache when I try to write code. No worries my friend.