Update dest folder and add old shell script so it is not last

Author: makermelissa

Wearable_Time_Lapse_Camera/timelapse.py

@@ -23,7 +23,7 @@
 WIDTH = 1280  # Image width in pixels
 HEIGHT = 720  # Image height in pixels
 QUALITY = 51  # JPEG image quality (0-100)
-DEST = "/home/pi/timelapse"  # Destination directory (MUST NOT CONTAIN NUMBERS)
+DEST = "/boot/timelapse"  # Destination directory (MUST NOT CONTAIN NUMBERS)
 PREFIX = "img"  # Image prefix (MUST NOT CONTAIN NUMBERS)
 HALT_PIN = board.D21  # Halt button GPIO pin (other end to GND)
 LED_PIN = board.D5  # Status LED pin (v2 Pi cam lacks built-in LED)

Wearable_Time_Lapse_Camera/timelapse.sh

@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# Timelapse script, because timelapse options in raspistill don't power
+# down the camera between captures. Script also provides a camera busy LED
+# (v2 cameras don't include one) and a system halt button.
+# 'gpio' command requires WiringPi: sudo apt-get install wiringpi
+# Limitations: if DEST is FAT32 filesystem, max of 65535 files in directory;
+# if DEST is ext4 filesystem, may have performance issues above 10K files.
+# For intervals <2 sec, better just to use raspistill's timelapse feature.
+
+# Configurable stuff...
+INTERVAL=15            # Time between captures, in seconds
+WIDTH=1280             # Image width in pixels
+HEIGHT=720             # Image height in pixels
+QUALITY=51             # JPEG image quality (0-100)
+DEST=/boot/timelapse   # Destination directory (MUST NOT CONTAIN NUMBERS)
+PREFIX=img             # Image prefix (MUST NOT CONTAIN NUMBERS)
+HALT=21                # Halt button GPIO pin (other end to GND)
+LED=5                  # Status LED pin (v2 Pi cam lacks built-in LED)
+prevtime=0             # Time of last capture (0 = do 1st image immediately)
+
+gpio -g mode $HALT up  # Initialize GPIO states
+gpio -g mode $LED  out
+mkdir -p $DEST         # Create destination directory (if not present)
+
+# Find index of last image (if any) in directory, start at this + 1
+FRAME=$(($(find $DEST -name "*.jpg" -printf %f\\n | sed 's/^[^1-9]*//g' | sort -rn | head -1 | sed 's/[^0-9]//g') + 1))
+
+while :         # Forever
+do
+	while : # Until next image capture time
+	do
+		currenttime=$(date +%s)
+		if [ $(($currenttime-$prevtime)) -ge $INTERVAL ]; then
+			break # Time for next image cap
+		fi
+		# Check for halt button -- hold >= 2 sec
+		while [ $(gpio -g read $HALT) -eq 0 ]; do
+			if [ $(($(date +%s)-currenttime)) -ge 2 ]; then
+				gpio -g write $LED 1
+				shutdown -h now
+			fi
+		done
+	done
+
+	OUTFILE=`printf "$DEST/$PREFIX%05d.jpg" $FRAME`
+	# echo $OUTFILE
+	gpio -g write $LED 1
+	raspistill -n -w $WIDTH -h $HEIGHT -q $QUALITY -th none -t 250 -o $OUTFILE
+	gpio -g write $LED 0
+	FRAME=$(($FRAME + 1)) # Increment image counter
+	prevtime=$currenttime # Save image cap time
+done