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Notes index links

Links to all my notes (includes mini-projects and source code etc)

(+) 0001 How do I change the Pi System partition size ?

(+) 0100 Device tree settings

(+) 0201 Power over Ethernet - (PoE)

(+) 0202 Solar Power - (with WiFi)

(+) 0203 Power Bank pass through

(+) 0400 Accessing the SDHC card system image

(+) 0401 Accessing PC shares from the Pi

(+) 0402 Installing samba - (the Pi as a Network Share on your PC)

(+) 0900 Can this approach be scaled up to a PC UPS ?

(+) 1001 Pandora Spotify on the Pi

(+) 1002 Playing movies on the Pi

(+) 1003 Getting VGA from the HDMI socket

(+) 1004 Using the RCA socket

(+) 1005 Using the Pi RS232 serial links

(+) 1006 Using the GPIO pins

(+) 1007 Controlling the Pi Zero ACT LED

(+) 1200 List of standard camera modes

(+) 1300 Auto file names

(+) 6500 How to make the System partition read only ?

(+) 6501 Minimising SDHC corruption on power down

(+) 9000 diode switch

(+) 9001 Auto shut down

(+) 9001 MOSFET switch

(+) C201 High speed photos

(+) Dec 1969 (no desc)

(+) a000 Display setup - (for PhotoFrame)

(+) a001 go photoframe - (how it works)

(+) a002 set photo - (select for display)

(+) a003 go button script - (photoframe pause control)

(+) a005 get photos - (fetch resize)

(+) a00x Other display utilities

(+) c000 CCTV UPS requirements

(+) c001 countering low speed motion detect

(+) c002 Pi Overclocking

(+) c203 Pi ram disk - (tmpfs)

(+) c901 iR illumination

(+) c902 Viewing a video stream



(-) c905 Image anotation


Annotating camera images

The '--annotate' (-a) flag allows data (time/date etc) text annotations to the image. By default, you get black text on a white background

The data is selected by setting it's 'bit'. For example, for time (b2 = 4) and date (b3 = 8) use '-a 12'.

You can add your own text may include date/time placeholders by using '%' character as used by strftime.

Value 	Meaning 	Example Output
b0
b1
b2 (4) 	Time 	20:09:33
b3 (8)	Date 	10/28/15

b4 (16) 	Shutter Settings
b5 (32) 	CAF Settings
b6 (64) 	Gain Settings
b7 (128) 	Lens Settings

b8 (256) 	Motion Settings
b9 (512) 	Frame Number
b10 (1024) 	Switch to white text on black background

Examples:-
-a "ABC %Y-%m-%d %X" 	Show some text 	ABC %Y-%m-%d %X
-a 4 -a "ABC %Y-%m-%d %X" 	Show custom formatted date/time. 	ABC 2015-10-28 20:09:33
-a 8 -a "ABC %Y-%m-%d %X" 	Show custom formatted date/time. 	ABC 2015-10-28 20:09:33

-ae     Set extra annotation parameters

Specifies annotation size, text-colour, background-colour. Colours are in hex YUV format.

Size ranges from 6 to 160, default is 32. Asking for an invalid size should give you the default.

Example 	Explanation
-ae 32,0xff,0x808000 -a "Wibble gibber gibber" 	gives size 32 white text on black background
-ae 10,0x00,0x8080FF -a "Wibble gibber gibber" 	gives size 10 black text on white background

Above information copied from Raspberry Pi camera documentation


This note last modified: 17th Nov 2017 17:30.

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(+) Dec 1969 (no desc)

(+) raspicamdocs.txt (no desc)

(+) s010 Elevation sensing

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