display sign-on message - useful to determine exactly which version is running Struct tm timeinfo // timeinfo structure (defined in time.h) #include // seems to work without this declaration? Int tm_mon // time.h: Months numbered 0-11 * Differences between time.h and RTC values Does not use any of the alarm functions Does not have provisions to set or adjust the clock data Does not display day-of-week information Displays date and time in ISO8601 format (YYYY-MM-DD HH:MM:SS) Assumes that the clock has previously been set By doing this I could use strftime() to easily display the results.Ĭode: // read data from a DS3231RTC chip without using a dedicated RTC libraryĬhar programName = "DS3231_Basic_20A.ino" Subsequently I made some changes in how the month and year are dealt with in order to make the RTC data more compatible with the time.h (lower case ‘t’) library. The example posted by Nick is essentially the same as the code that I first came up with and is all you really need. Rtc.setDOW(WEDNESDAY) // Set Day-of-Week to SUNDAY The following lines can be uncommented to set the date and time Init the DS3231 using the hardware interface a software-based, TWI-like protocol which will require exclusive access other than what is described above the library will fall back to You can connect the DS3231 to any available pin but if you use any so external pull-up resistors on the data and clock signals are required. The chipKit boards does not have pull-up resistors on the hardware I2C interface SCL pin -> Digital 21 (the pin labeled SCL) DS3231: SDA pin -> Digital 20 (the pin labeled SDA) *** Please note that JP6 and JP8 must be in the I2C position (closest to the analog pins)
To use the hardware I2C (TWI) interface of the chipKit you must connect
SETDATE DOES NOT UPDATE MONTH SERIAL
quickly send time and date information over a serial link
SETDATE DOES NOT UPDATE MONTH HOW TO
A quick demo of how to use my DS3231-library to Copyright (C)2015 Rinky-Dink Electronics, Henning Karlsen. I can set the day of the week as well as time no problem but it will not set the current date? any ideas? im using an arduino MEGA.
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