Overview

GSM/GPRS/GPS Shield is an Arduino shield based on the Quad-band GSM/GPRS/GPS module SIM908.

Features

General

• Arduino connectivity, connects to Arduino Board directly
• NOKIA speaker & mic, supports hands-free phone talk
• Onboard CP2102 for easily debugging through USB interfere
• Onboard 74HC125, for time-shared controlling GSM and GPS port through single serial port
• Earphone insert detection & call vibration
• Quad-band 850/900/1800/1900MHz
• GPRS multi-slot class 10
• GPRS mobile station class B 
• Compliant to GSM phase 2/2+
  • Class 4 (2 W @ 850/900 MHz)
  • Class 1 (1 W @ 1800/1900 MHz)
• Control via AT commands (GSM 07.07, 07.05 and SIMCom enhanced AT Commands)
• SIM application toolkit
• Supply voltage range :
  • GPRS: 3.2 ~ 4.8 V
  • GPS: 3.0 ~ 4.5V
• Operation temperature : -40 °C to +85 °C

SMS

• Point-to-point MO and MT
• SMS cell broadcast
• Text and PDU mode

Audio

• Tricodec
  • Half rate (HR)
  • Full rate (FR)
  • Enhanced Full rate (EFR)
• Hands-free operation
• Echo cancellation

GPRS

• GPRS class 8/10: max. 85.6 kbps (downlink)
• PBCCH support
• Coding schemes CS 1, 2, 3, 4
• PPP-stack

CSD

• CSD up to 14.4 kbps
• USSD
• Non transparent mode

GPS

• Receiver type
  • 42-channel
  • GPS L1 C/A code
  • High-performance STE engine
• Sensitivity
  • Tracking: -160 dBm
  • Cold starts : -143 dBm
• Time-To-First-Fix
  • Cold starts : 30s (typ.)
  • Hot starts : 1s (typ.)
• Accuracy
  • Horizontal position : <2.5m CEP
• Power consumption (GSM engine in idle mode)
  • Acquisition : 77mA
  • Tracking : 76mA

What's on Board

1. Earphone jack : SIM908 2nd analog voice channel output
2. GSM antenna connector : SMA interface
3. Arduino expansion connector : for connecting with an Arduino board
4. GSM antenna connector
5. SIM908 control interface
6. GPS antenna connector
7. USB TO UART interface
8. NOKIA original speaker : SIM908 1st analog voice channel output
9. Arduino reset button
10. SIM908
11. SIM908 network indicator : blinking slowly when network registration is successful
12. Power indicator
13. Mic : SIM908 1st analog voice channel input
14. SIM card slot
15. CP2102
16. UART Tx/Rx indicator
17. Power switch
18. 6V~9V DC power jack
19. Vibration motor
20. 74HC125
21. NCP2890 power amplifier : amplifies the SIM908 1st analog voice channel
22. MIC29302 power chip
23. SIM908 analog output positive jumper :
    • open it when NCP2890 is enabled
    • short it when NCP2890 is disabled
24. SIM908 analog output negative jumper :
    • open it when NCP2890 is enabled
    • short it when NCP2890 is disabled
25. NCP2890 enable jumper :
    • short the EN and VBAT to enable
    • short the EN and GND to disable

Photos

Dimension

Downloads

1. GSM/GPRS/GPS Shield x 1
2. GSM Antenna × 1
3. GPS External Antenna (B) × 1
4. Speaker chamber × 1
5. Mounting screws × 2
6. 9V power adapter × 1
7. USB type A plug to mini-B plug cable x 1