1
3
4
2
G
P
I
O
1
4
U
A
R
T
0
_
T
X
D
G
P
I
O
1
5
U
A
R
T
0
_
R
X
D
G
P
I
O
1
8
P
C
M
_
C
L
K
G
P
I
O
2
3
G
P
I
O
2
4
G
P
I
O
2
5
G
P
I
O
8
S
P
I
0
_
C
E
0
_
N
G
P
I
O
7
S
P
I
0
_
C
E
1
_
N
ID_SC I2C ID EEPROM
G
P
I
O
1
2
G
P
I
O
1
6
G
P
I
O
2
0
G
P
I
O
2
1
G
P
I
O
2
S
D
A
1
I
2
C
G
P
I
O
3
S
C
L
1
I
2
C
G
P
I
O
4
G
P
I
O
1
7
G
P
I
O
2
7
G
P
I
O
2
2
GIPO10 SPI0_MOSI
G
P
I
O
9
S
P
I
0
_
M
I
S
O
G
P
I
O
1
1
S
P
I
0
_
S
C
L
K
ID_SD I2C ID EEPROM
G
P
I
O
5
G
P
I
O
5
G
P
I
O
6
G
P
I
O
1
3
G
P
I
O
1
9
G
P
I
O
2
6
GND
3V3
5V
RaspberryPi
Model 2 v1.1
2
1
2
1
S1R21kΩR110kΩRaspberry Pi1