![]() ![]() The online timer is an easy-to-use computer timer you can use to display a large countdown on the screen. This is the easiest way to set a live timer online. You can access this via the internet without downloading an app. long interval = 10000 // interval at which to do something (milliseconds)Ĭlock.On any browser, you can use a free online timer to set a timer on your computer. unsigned long previousMillis = 0 // last time update Int buttonCount = 0 //start at zero starts clock in run mode Int downButton = 6 //pos "2" on 3 way nav ![]() ![]() Int nextButton = 5 //pos "T" on 3 way nav #define ALRM1_MATCH_EVERY_SEC 0b1111 // once a secondīyte ADay, AHour, AMinute, ASecond, ABits īyte year, month, date, DoW, hour, minute, second Ok, I linked to Eric Ayar's DS3231 library. The above example sets the alarms where one of them fires every minute at the top of the minute (:00 seconds mark) and the other at the bottom of it (:30 seconds mark.) +-> INTEGER representing day of the week, 1 to 7 (Monday to Sunday)ĬtA1Time(Clock.getDoW(), Clock.getHour(h12, PM), Clock.getMinute(), 30, AlarmBits, true, false, false) ĬtA2Time(Clock.getDate(), Clock.getHour(h12, PM), Clock.getMinute(), AlarmBits, false, false, false) | +-> true if you're setting DoW, false for absolute date | | +-> true if setting time based on 12 hour, false if based on 24 hour setA2Time() routines: // Set AlarmBits, ALRM2 first, followed by ALRM1ĪlarmBits when set for 12h time, true for pm, false for am Then, I add them together before passing it to my. I declare the various bytes for the different modes, for each of alarm 1 and alarm 2. #define ALRM2_MATCH_HR_MIN 0b100 // when hours and minutes match #define ALRM2_MATCH_MIN 0b110 // when minutes match #define ALRM2_ONCE_PER_MIN 0b111 // once per minute (00 seconds of every minute) #define ALRM1_MATCH_HR_MIN_SEC 0b1000 // when hours, minutes, and seconds match #define ALRM1_MATCH_MIN_SEC 0b1100 // when minutes and seconds match #define ALRM1_MATCH_SEC 0b1110 // when seconds match The way I do it is like this: #define ALRM1_MATCH_EVERY_SEC 0b1111 // once a second You have to set the registers for BOTH alarms at the same time. Wire.requestFrom(104, 3) //get 3 bytes (seconds,minutes,hours) Wire.requestFrom(104, 4) //get 5 bytes(day,date,month,year,control) Sprintf(dateChr, " %s %d/%d ", dayOfWeekChar, month, dayOfMonth) //extra spaces are intentional so no weird char pop in at the end Sprintf(dateChr, " %s %d/%d ", dayOfWeekChar, month, dayOfMonth) //add an extra space to center text when month and DOM are < 10 extra spaces are intentional so no weird char pop in at the end Sprintf(timeChr, "%s%d%s%d%s", space, hours, seperator, minutes, suffix) Int DI0pin = 13 // Input pin for display dataĮPaper epaper = ePaper(EIO1pin, XCKpin, LATCHpin, SLEEPBpin, DI0pin) Int SLEEPBpin = 12 // Sleep Pin for the display Int LATCHpin = 11 // Latch pulse input pin for display data Int XCKpin = 10 // Clock input pin for taking display data Int EIO1pin = 9 // Input/output pin for chip selection I pulled out all the code that I used to set the time and date to make it easier to read. I've spent 2 days on it and I'm no closer to figuring it out than I was 2 days ago! Very frustrating!Ĭan someone baby-step me through it? What library should I be using? For now I'm just talking to the DS3231 with the Wire library. I can't for the life of me figure out how to do it. I thought I could set the DS3231 to alarm on the minute (when the seconds hit zero), and have my code update the display when the alarm goes off. I figured to save battery power, I'd just update the clock display when then minutes change. I also have it running off a LiPo battery. I have everything running just like it should. I'm working on a clock made with the SparkFun e-paper display and a DS3231. ![]()
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