MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document.
Specification and information contained in the present schematic are subject to change at any time without notice. Copyright © 2014 MikroElektronika. All rights reserved.
5. GSM3 click
™
board schematic
8. Support
7. Code examples
MikroElektronika offers free tech support
(www.mikroe.com/support) until the end
of the product’s lifetime, so if something
goes wrong, we’re ready and willing to help!
Once you have done all the necessary
preparations, it’s time to get your click
™
board
up and running. We have provided examples
for mikroC
™
, mikroBasic
™
and mikroPascal
™
compilers on our Libstock website. Just
download them and you are ready to start.
Resolder the onboard zero ohm SMD jumper to
select between 3.3V or 5V I/O voltage levels
(soldered in the 3.3V position by default).
6. SMD jumpers
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
MIKROBUS DEVICE CONN.
GSM ANT
1
5
2
3
7
4
8
VCC
GND
RST
CLK
IO
CD2
CD1
U4
SIM_CARD
LD1
LD2
LD3
R2
100K
+5V
+5V
R1
2K2
GND
+5V
R3
10K
R4
1K5
E2
10uF
GND GND
Vg sm
GND
C2
100nF
GND
GND
C4
100nF
VDD_EXT
GND
GND
GND
GND
Q1
BC846
R5
1K
GND
R6
100K
GND
7
6
5
4
3
2
1
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
VBAT
GND
GPIO1
STATUS
BPI_BUSI
GND
VBUS
GND
MIC2P
MIC2N
SPK2N
MIC1N
SPK1N
SIM_DATA
SIM_RST
VSIM
FM_ANT_P
VDDEXT
USB_DM
COL0
COL3
COL2
PCMIN
PCMSYNC
NETLIGHT
ROW4
ROW0
ROW2
ROW1
USB_DP
GND
FM_ANT_N
VRTC
SIM_CLK
SIMPRE
SPK1P
MIC1P
SPK2P
ADC
RESET
PWRKEY
ISINK0
ISINK1
GND
R
O
W
3
C
O
L4
C
O
L1
PW
M
G
PI
O
2
G
PI
O
3
PC
M
C
LK
PC
M
O
U
T
R
XD
TX
D
R
TS
C
TS
G
N
D
BT
_A
N
T
G
N
D
G
N
D
G
N
D
A
N
T
G
N
D
V
BA
T
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
G
N
D
SD
A
SC
L
G
N
D
G
N
D
G
N
D
U
A
R
T_
D
C
D
U
A
R
T_
D
TR
U
A
R
T_
R
I
G
N
D
SIM800H
U1
SIM800H
GND
Q3
BC846
R12
1K
GND
R13
100K
GND
VCC
R14
3K3
Q4
BC846
R15
1K
GND
R16
100K
GND
VCC
R17
3K3
Vgsm
GND
R9
22
R10
22
R11
22
C7
22pF
GND
GND
VCC
C1
100nF
E1
10uF
E3
470uF
C3
100nF
GND
GND
Vg sm
GND
GND
C5
33pF
C6
10pF
GND
VDD_EXT
GND
STAT
RST
RTS
GPIO1
CTS
TXD
RXD
!GPIO1
!RXD
!TXD
!RTS
!CTS
!STAT
GPIO1
RXD
TXD
RTS
CTS
STAT
PWRKEY
!PWRKEY
!GPIO1
!STAT
!STAT
SIM_DATA
SIM_RST
FM_ANT_P
!R
XD
!T
XD
!R
TS
!C
TS
BT
_A
N
T
G
SM
_A
N
T
NETLIGHT
NETLIGHT
SIM_CLK
SIMPRE
SIMPRE
GND
PWRKEY
!PWRKEY
SIM_VCC
SIM_RST
SIM_DATA
SIM_CLK
GSM_ANT
BT_ANT
E4
10uF
E5
10uF
SIM_VCC
FM_ANT_P
MIC+
MIC+
EAR+
EAR+
L1
270nH
GND
MIC-
E6
10uF
MIC-
Q2
BC846
R7
1K
GND
R8
100K
GND
RST
!RST
!RST
D1
C8
1uF
FP1
FERRITE
C9
NP
C10
NP
GND
A1
Rufa_2.4GHz_LEFT
GND
Audio+FM antenna (earphone)
connection pads
1
2
3
4
HD1
A
D
J
5
V
O
U
T
4
G
N
D
3
V
IN
2
GND
6
SH
D
N
1
U2
MCP1826T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A1
VCCA
A2
A3
A4
A5
A6
OE
B5
B6
B1
VCCB
B2
B3
B4
GND
TX
B0
10
6
U3
TXB0106
R18
0R
GND
+5V
+3.3V
+3.3V
1
2
3
1 LEAR - left earphone
2 REAR - rear earphone
3 MIC - microphone
4 GND
HD1
.com
