# Time Lapse Photos (Credit nedhorning) # # This example shows off how to take time lapse photos using your OpenMV # Cam and using the RTC module along with a timer interrupt to achieve # very low power operation. # # Note that if the USB is still plugged in when the camera is taking # pictures it will run the bootloader each time. Please power the camera # from something other than USB to not have the bootloader run. import pyb, machine, sensor, image, pyb, os # Create and init RTC object. This will allow us to set the current time for # the RTC and let us set an interrupt to wake up later on. rtc = pyb.RTC() newFile = False try: os.stat('time.txt') except OSError: # If the log file doesn't exist then set the RTC and set newFile to True # datetime format: year, month, day, weekday (Monday=1, Sunday=7), # hours (24 hour clock), minutes, seconds, subseconds (counds down from 255 to 0) rtc.datetime((2018, 3, 9, 5, 13, 0, 0, 0)) newFile = True # Extract the date and time from the RTC object. dateTime = rtc.datetime() year = str(dateTime[0]) month = '%02d' % dateTime[1] day = '%02d' % dateTime[2] hour = '%02d' % dateTime[4] minute = '%02d' % dateTime[5] second = '%02d' % dateTime[6] subSecond = str(dateTime[7]) newName='I'+year+month+day+hour+minute+second # Image file name based on RTC # Enable RTC interrupts every 10 seconds, camera will RESET after wakeup from deepsleep Mode. rtc.wakeup(10000) BLUE_LED_PIN = 3 sensor.reset() # Initialize the camera sensor. sensor.set_pixformat(sensor.GRAYSCALE) sensor.set_framesize(sensor.VGA) sensor.skip_frames(time = 1000) # Let new settings take affect. # Let folks know we are about to take a picture. pyb.LED(BLUE_LED_PIN).on() if(newFile): # If log file does not exist then create it. with open('time.txt', 'a') as timeFile: # Write text file to keep track of date, time and image number. timeFile.write('Date and time format: year, month, day, hours, minutes, seconds, subseconds' + '\n') timeFile.write(newName + ',' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' + second + ',' + subSecond + '\n') else: with open('time.txt', 'a') as timeFile: # Append to date, time and image number to text file. timeFile.write(newName + ',' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' + second + ',' + subSecond + '\n') if not "images" in os.listdir(): os.mkdir("images") # Make a temp directory # Take photo and save to SD card img = sensor.snapshot() img.save('images/' + newName, quality=90) pyb.LED(BLUE_LED_PIN).off() # Enter Deepsleep Mode (i.e. the OpenMV Cam effectively turns itself off except for the RTC). machine.deepsleep()