Pin mapping

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	A	B	D	E	F	G	H	I	J
1	http://raspi.tv/wp-content/uploads/2014/07/Raspberry-Pi-GPIO-pinouts.png
2	http://www.raspberrypi.org/wp-content/uploads/2014/04/bplus-gpio.png
3
4	Pi A/B			Pi B+
5	Rev 2 P1 GPIO header			J8 B+ GPIO header
6
7	3.3v	5v		3.3v	1	3v3	5v	2	5v
8	GPIO 2	5v		GPIO 2	3	SDA	5v	4	5v
9	GPIO 3	GND		GPIO 3	5	SCL	GND	6	GND
10	GPIO 4	GPIO 14		GPIO 4	7	P7	GPIO 14	8	TXD
11	GND	GPIO 15		GND	9	GND	GPIO 15	10	RXD
12	GPIO 17	GPIO 18		GPIO 17	11	P0	GPIO 18	12	P1
13	GPIO 27	GND		GPIO 27	13	P2	GND	14	GND
14	GPIO 22	GPIO 23		GPIO 22	15	P3	GPIO 23	16	P4
15	3.3v	GPIO 24		3.3v	17	3v3	GPIO 24	18	P5
16	GPIO 10	GND		GPIO 10	19	MOSI	GND	20	GND
17	GPIO 9	GPIO 25		GPIO 9	21	MISO	GPIO 25	22	P6
18	GPIO 11	GPIO 8		GPIO 11	23	SCLK	GPIO 8	24	CE0
19	GND	GPIO 7		GND	25	GND	GPIO 7	26	CE1
20				DNC	27		DNC	28
21				GPIO 5	29		GND	20
22				GPIO 6	31		GPIO 12	32
23				GPIO 13	33		GND	34
24				GPIO 19	35		GPIO 16	36
25				GPIO 26	37		GPIO 20	38
26				GND	39		GPIO 21	40
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28
29
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31
32			Power +	UART
33			GND	SPI
34			S2C	GPIO
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