mikroElektronika GSM3 click, SIM800H Quick Start Manual

2. Soldering the headers

Before using your click™ board, make sure
to solder 1x8 male headers to both left
and right side of the board. Two 1x8 male
headers are included with the board in
the package.

1

GSM3 click

™

1. Introduction

GSM3 click™ carries SIM800H, a quad-band
(850/900/1800/1900MHz) GSM/GPRS
module that transmits voice, sms and data
information. The board communicates
with the target board MCU through the
following mikroBUS™ lines: Tx and Rx
(UART), RST (reset), GP1 (status indicator),
GP2 (RTS), GP3 (GPIO1), GP4 (PWRKEY,

used to power on/o the module) and GP5

(CTS). GSM3 click™ is designed to use 3.3V

and 5V I/O voltage levels.

2 3

Turn the board upside down so that
the bottom side is facing you upwards.
Place shorter pins of the header into the
appropriate soldering pads.

Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder
the pins carefully.

3. Plugging the board in

Once you have soldered the headers your
board is ready to be placed into the desired
mikroBUS™ socket. Make sure to align the
cut in the lower-right part of the board with

the markings on the silkscreen at the

mikroBUS™ socket. If all the pins

are aligned correctly, push the
board all the way into the socket.

4. Essential features

The underside of GSM3 click™ holds the SIM
card slot. Aside from that the click™ has the
following additional features: audio input/
output connection pad (for microphone

and earphones, can also be used as an FM
antenna). The STM800H module supports

Bluetooth so the click™ has an active

2.4GHz antenna. A connector for an
external GSM antenna is also provided.

Two indication LEDs signal the operating
and network status of the module.

™

click

BOARD

www.mikroe.com

GSM3 click™ manual

ver 1.00

0100000072134

5. GSM3 click™ board schematic

+5V

GND GND

GND

GND

VCC

VCC

GND GND

+3.3V

6. SMD jumpers

STAT
RST
RTS
GPIO1
PWRKEY

GND GND

VDD_EXT

!GPIO1

!RXD
!TXD
!RTS
!CTS
!STAT

PWRKEY

RST

GND

+5V

1
2
3
4
5
6
7
8 9

C4

100nF

GND GND

R5

1K

GND

R7

1K

GND

SHDN

1

FP1

FERRITE

AN

RST
CS
SCK
MISO
MOSI
+3.3V
GND

MIKROBUS DEVICE CONN.

U3

A1
VCCA
A2
A3
A4
A5
A6
OE

TXB0106

R6
100K

R8
100K

6

GND

ADJ5VOUT4GND

VIN

3

2

E2

10uF

GND

GND

U2
MCP1826T

GND

E6
10uF

R13
100K

E4
10uF
E5
10uF

R18

0R

R14
3K3

LD2 LD3

GND

C10

NP

GND

PWM

INT

TX
RX

SCL
SDA
+5V

GND

+3.3V

B1

VCCB

B2
B3
B4
B5

TXB0106

B6

GND

Q1
BC846

Q2
BC846

CTS
TXD
RXD

Vgsm

GND

C5

C6

33pF

10pF

D1

GND

GND

+5V

1

2

3

!GPIO1
!STAT

16

GPIO1

15
14

RXD

13
12
11
10

!PWRKEY

GND

TXD

VDD_EXT

RTS
CTS

MIC-

STAT

SIM_DATA
SIM_RST
SIM_VCC
FM_ANT_P

!RST

SIM_VCC
SIM_RST
SIM_CLK
SIM_DATA

1

VBAT

2

GND

3

GPIO1

4

STATUS

5

BPI_BUSI

6

GND

7

VBUS

8

GND

9

MIC2P

10

MIC2N

11

SPK2N

12

MIC1N

13

SPK1N

14

SIM_DATA

15

SIM_RST

16

VSIM

17

FM_ANT_P

18

VDDEXT

19

USB_DM

20

COL0

21

COL3

22

COL2

ROW 3

2324252627

R9 22
R10 22
R11 22

C7

22pF

GND GND

79

82838485868788

80

81

GND

GND

GND

GND

GND

GND

GND

GND

SIM800H

COL4

COL1

PWM

PCMCLK

RXD

GPIO 2

GPIO 3

PCMOU T

293031

32

28

!RXD

!TXD

U4

1

VCC

2

RST

3

CLKIOCD2

7

C8

1uF

SIM_CARD

GND

GND

TXD

RTS

3334353637

!RTS

!CTS

CD1

GND

SCL

SDA

GND

GND

GND

BT_A NT

CTS

GND

GND

GND

38

BT_A NT

8
4
5

GND

72737475767778

394041

U1

71

676869

70

SIM800H

GND

GND

GND

UART _DT R

UART _DC D

VBAT

ANT

GND

GND

424344

GSM_ ANT

66

PCMIN

UART _RI

65

PCMSYNC

64

NETLIGHT

63

ROW4

62

ROW0

61

ROW2

60

ROW1

59

USB_DP

58

GND

57

FM_ANT_N

56

VRTC

55

SIM_CLK

54

SIMPRE

53

SPK1P

52

MIC1P

51

SPK2P

50

ADC

49

RESET

48

PWRKEY

47

ISINK0

46

ISINK1

45

GND

GND

GND

Vgsm

GND

NETLIGHT

SIM_CLK

SIMPRE

EAR+

!RST

!PWRKEY

GND

SIMPRE

NETLIGHT

!STAT

GND

FM_ANT_PMIC+
MIC+
EAR+

MIC-

GSM_ANT

BT_ANT

R12

1K

R15

1K

L1
270nH

C9

NP

GND

Q3
BC846

R16
100K

GND

Audio+FM antenna (earphone)

1

connection pads

2
3
4

HD1

GND

A1

GND

R17
3K3

Q4
BC846

GND

GSM ANT

Rufa_2.4GHz_LEFT

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).

7. Code examples

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.

.com

8. Support

Vgsm

R2
100K

R3
10K

R4
1K5

C2

100nF

470uF

E3

C3

100nF

VCC

C1
100nF

+5V

MikroElektronika oers free tech support

R1
2K2

E1

10uF

LD1

GND

1 LEAR - left earphone

2 REAR - rear earphone

3 MIC - microphone

4 GND

HD1

(www.mikroe.com/support) until the end
of the product’s lifetime, so if something
goes wrong, we’re ready and willing to help!

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.