MWatch

Language	English

Objective Use mCookie to build a simple watch. 400px Principle Acquire time via RTC module and display time on the OLED screen. 600px Equipment Module Number Function mCookie-CoreUSB 1 Core board mCookie-RTC 1 Clock module mCookie-OLED 1 Display screen Microduino-BM 1 Battery management 600px Preparation Setup 1：Connect CoreUSB with your PC/MAC with a USB cable and open Arduino IDE. 600px Setup 2：Click file > Examples > mCookie > _202_mWatch and load program. 600px Setup 3：Load the code and copy the program code to IDE. Select the right board and COM port for program download after compiling. 600px Program Description " draw()" function is OLED display interface and it displays characters with a few steps： Set font Set font coordinate place Print characters to be displayed setRtcTime() is time setting function. For example setRtcTime(15, 5, 18, 1, 10, 22, 33) presents 33 seconds at 10: 22 on Monday, 18, May, 2015. void setRtcTime (byte _year, byte _month, byte _day, byte _week, byte _hour, byte _minute, byte _sec) { //clear out all the registers rtc.initClock(); rtc.setDate(_day, _week, _month, 0, _year); rtc.setTime(_hour, _minute, _sec); } Code Debugging Find this code section and set the initial time of the RTC module. Re-load the code to CoreUSB after setting. setRtcTime(15, 5, 18, 1, 00, 00, 00); Enter "//" before this code section after loading the program, the whole section will turn gray and then re-load the program and you'll see RTC can time automatically. ("//" means "comment out the program code and do not perform ". In this way, you needn't run the program after calibration or the system will need re-set time after power-fail and re-start. ) //setRtcTime(15, 5, 18, 1, 00, 00, 00); Hardware Buildup Setup 1：Connect the activated battery box and BM module. Setup 2：Stack all modules together with fixed order and finish circuit buildup. 600px Result The first line shows data and week. The second line displays: time and the third displays custom text. 600px Video