DayOfWeek in RTC library for R4 WIFI

Projects Programming
1

I am playing with built-in RTC module in R4WIFI. The RTC library provides following methods:

getDayOfMonth()
getMonth()
getYear()
getHour()
getMinutes()
getSeconds()
The RTCTime object contains DayOfWeek and yet there is no method

getDayOfWeek()

Has anyone figured out how to extract that information after executing
RTCTime currentTime;
RTC.getTime(currentTime);
From the currentTime RTCTime object?

2

Which is the RTC library? Show the link
There are dozens RTC libraries in the github

3

under the assumption your object is named obj it could be

int dayOfWeek = obj.getDayOfWeek();

if not:

  • show your code
  • show the error message you get
  • LINK to the EXACT location of the used library
4 
int currentSecond;

void setup() {  
  Serial.begin(9600);  
  RTC.begin();    
  RTCTime startTime(17, Month::SEPTEMBER, 2023, 13, 37, 00, 
                    DayOfWeek::SUNDAY, SaveLight::SAVING_TIME_ACTIVE); 
  RTC.setTime(startTime);
}

void loop(){
  RTCTime currentTime;
  RTC.getTime(currentTime);
  if (currentTime.getSeconds()!=currentSecond){
    //Serial.print(currentTime.getDayOfWeek()); Serial.print(" ");
    Serial.print(currentTime.getDayOfMonth()); Serial.print(".");
    Serial.print(Month2int(currentTime.getMonth())); Serial.print(".");
    Serial.print(currentTime.getYear()); Serial.print(" ");
    Serial.print(currentTime.getHour()); Serial.print(":");
    Serial.print(currentTime.getMinutes()); Serial.print(":");
    Serial.println(currentTime.getSeconds());
    currentSecond=currentTime.getSeconds();
  }

If I uncomment the line I get :
no matching function for call to 'UART::print(DayOfWeek)'

5

You still haven't said which library you're using.

That doesn't make sense!

Please copy & paste the full message.

6

C:\Users\Dell\Documents\ArduinoData\packages\arduino\hardware\renesas_uno\1.0.2\cores\arduino/api/String.h:70:2: note: no known conversion for argument 1 from 'DayOfWeek' to 'const char*'
exit status 1
no matching function for call to 'arduino::String::String(DayOfWeek)'

7

This does not mean that getDayOfWeek() is undefined, it means that print() does not know how to display the value it returns, which is of type

enum class DayOfWeek : uint8_t {
    MONDAY = 1,
    TUESDAY = 2, 
...

https://github.com/arduino/ArduinoCore-renesas/blob/1.0.4/libraries/RTC/src/RTC.h#L48-L58

This will convert it to something that print() can handle:

int DayOfWeek2int(DayOfWeek dow, bool sunday_first);
8

DayOfWeek is a bit like Month. for instance
DayOfWeek has possible values of:
DayOfWeek::MONDAY
DayOfWeek::TUESDAY etc
While Month has possible vaues of :
Month::JANUARY
Month::FEBRUARY etc.
In the example that comes with library they show how to display the month in dec format:
Serial.print(Month2int(currentTime.getMonth()));
I cannot find much on Month2Int method. Without it I get the same error like for DayOfWeek

9

That is great. Thanks. Are there methods to convert either DayOfWeek or Month to its string representation ather then to intiger value

10

If there aren't, a lookup table would probably be easiest ...

eg,

const char *daysOfTheWeek[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

from: