Add a simple time-lapse webcam script

README.md

@@ -28,3 +28,6 @@ behavior was reverse engineered from the iOS and Android versions of CamKing.
 
 There should be other functions that I have not exposed yet. Most of the methods
 do not return useful values, or do any error checking at all.
+
+A much nicer project that works with a very similar camera is over at Steven
+Hiscock's [yidashcam](https://github.com/kwirk/yidashcam).

novatek.py

@@ -127,6 +127,11 @@ def format_sd(self):
   def reset_config(self):
     x = self._get_xml(3011)
 
+  def cmd_3012(self):
+    # Version number? 'HT10 20160310 V1.0'
+    x = self._get_xml(3012)
+    return x.find('./String').text
+
   def get_config(self):
     x = self._get_xml(3014)
     config = { k.text: v.text for k, v in \

webcam.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+
+import datetime
+import logging
+import os
+import re
+import subprocess
+import time
+
+from novatek import Novatek
+
+
+logging.basicConfig(
+  datefmt='%m-%d-%y %H:%M:%S',
+  format='%(asctime)s %(levelname)-8s %(message)s',
+  level=logging.INFO
+)
+
+
+logging.info('Configuring camera')
+N = Novatek()
+N.set_mode(Novatek.MODE['Video'])  # needs to be in video mode to take photos??
+
+
+def capture():
+  logging.info('Starting capture')
+  try:
+    N.take_photo()
+  except Exception as e:
+    logging.exception('Capture failed')
+
+def get_remaining_captures():
+  try:
+    x = N.get_capture_num()
+    logging.info('Space remaining to store %i photos', x)
+    return x
+  except Exception as e:
+    logging.exception('Failed to get remaining space')
+    return 1000
+
+# Capture
+while True:
+  capture()
+  while get_remaining_captures() < 20:
+    files = N.get_file_list()
+    oldest = files[0]  # big assumption that this is oldest
+    logging.warn('Disk space is too low, purging %s', oldest)
+    Novatek().delete_file(oldest)
+  time.sleep(60)