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