Overview

This is a handy, low power Raspberry Pi HAT which features multi communication functionalities: GSM, GPRS, GNSS and Bluetooth.

It allows your Pi to easily make a telephone call, send messages, connect to wireless Internet, global position, transfer data via Bluetooth, and so on.

Features

General

• Raspberry Pi connectivity, compatible with Raspberry Pi 2B/3B/3B+/Zero/Zero W
• Supports SMS, phone call, GPRS, DTMF, HTTP, FTP, MMS, email, etc.
• Support GPS, COMPASS, Glonass, LBS base station positioning, omni-positioning
• Bluetooth 3.0, supports data transferring through Bluetooth
• Onboard USB TO UART converter CP2102 for UART debugging
• 6x LEDs for indicating the module working status
• SIM card slot for 1.8V/3V SIM card
• RTC with backup battery holder
• Baudrate auto detection (1200bps ~115200bps)
• Control via AT commands (3GPP TS 27.007, 27.005, and SIMCOM enhanced AT Commands)
• Supports SIM application toolkit: GSM 11.14 Release 99
• Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

GSM/GPRS

• Band
  • GSM 850/EGSM 900/DCS 1800/PCS 1900 MHz
  • Quad-band auto search
  • Compliant to GSM phase 2/2+
• Emitting power
  • Class 4 (2W @ GSM 850/EGSM 900 MHz)
  • Class 1 (1W @ DCS 1800/PCS 1900 MHz)
• GPRS connectivity
  • GPRS multi-slot class 12 (default)
  • GPRS multi-slot class 1~12 (configurable)
• GPRS data feature
  • Downlink speed: max 85.6kbps
  • Uplink speed: max 85.6kbps
  • Coding schemes: CS-1\CS-2\CS-3\CS-4
  • Supports PAP (Password Authentication Protocol) for PPP connection
  • Supports PBCCH
  • Supports USSD
• SMS
  • Supports: MT/MO/CB/Text/PDU mode
  • SMS storage: SIM card
• Audio
  • Voice encode/decode mode: Half Rate\Full Rate\Enhanced Full Rate\Adaptive muti rate
  • Supports echo cancellation
  • Supports noise reduction

GNSS

• Receiver type
  • 33 tracking channels
  • 99 acquisition channels
  • GPS L1 C/A code
• Sensitivity
  • Tracking: -165 dBm
  • Cold starts : -148 dBm
• Time-To-First-Fix
  • Cold starts : 28s (typ.)
  • Hot starts : < 1s
  • Warm starts: 26s
• Accuracy
  • Horizontal position : <2.5m CEP

Bluetooth

• Integrates AT commands
• Compliant to Bluetooth specification3.0 + EDR
• Supports SPP, OPP, HFP/HSP, etc.

Misc

• Operating voltage: 5V
• Operating temperature: -40°C ~ 85°C
• Storage temperature: -45°C ~ 90°C
• Dimensions: 30.2mm x 65mm

What's on Board

1. SIM868 module
2. ZMM5V1: regulator diode
3. SMF05C: TVS diode
4. CP2102: USB TO UART converter
5. MP1482: power chip
6. NDC7002N: voltage level translator
7. GPS status indicator
8. NET indicator:
   • flashes fast when the module starts up
   • flashes slowly after GSM register succeed
9. STA module working status indicator
10. SIM868 UART Tx/Rx indicator
11. Power indicator
12. SIM868 control button: press the button and hold for 1s, to startup/shutdown the SIM868
13. Raspberry Pi GPIO connector
14. SIM card slot
15. USB TO UART interface
16. 3.5mm earphone/mic jack
17. GNSS antenna connector
18. Bluetooth antenna connector
19. GSM antenna connector
20. CR1220 battery holder: for RTC backup battery
21. UART selection switch
    • A: control the SIM868 through USB TO UART
    • B: control the SIM868 through Raspberry Pi
    • C: access Raspberry Pi through USB TO UART