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NOTE: This product is only 2G Compatible! Unfortunately while there are still 2G networks in some parts of America and Europe, there are no longer 2G net...

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NOTE: This product is only 2G Compatible! Unfortunately while there are still 2G networks in some parts of America and Europe, there are no longer 2G networks in Australia anymore.

Prohibited by the module manufacturer SIMCOM, we're not allowed to ship this product, or to provide any tech support, to the following countries/regions: Iran, North Korea, Cuba, Sudan, Syrian.
GSM/GPRS/GNSS/Bluetooth HAT for Raspberry Pi, Based on SIM868

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
  • Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
  • 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
Photos
       
Note: the Raspberry Pi in the photo is NOT included.
Dimension
Development Resources
  1. GSM/GPRS/GNSS HAT x1
  2. GSM Antenna x1
  3. GPS External Antenna (B) x1
  4. Bluetooth Antenna x1
  5. USB type A plug to micro plug cable x1
  6. RPi screws pack (2pcs) x1

Jargon buster

Plain-language definitions for the technical terms used above.

CS
CS stands for chip select, a control pin used by SPI devices to tell which connected device should listen. It matters when you connect more than one SPI module to the same microcontroller, because each device usually needs its own CS pin.
GLONASS
Russia’s satellite navigation system. A receiver that can also use GLONASS has more satellites to choose from, which can improve positioning reliability when the sky view is partly blocked.
GNSS
GNSS stands for Global Navigation Satellite System, covering positioning systems such as GPS and similar satellite networks. It matters here because high-precision GNSS modules can output lots of serial position data that this product can send wirelessly to a computer or phone.
GPIO
General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
GPS
The US satellite navigation system used by GNSS receivers to calculate position and time. Support for GPS is important because it is widely available and often used together with other constellations for more reliable positioning.
RTC
A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
STM32
STM32 is a family of microcontroller chips commonly used in embedded electronics. Knowing a product uses an STM32 can help when looking at firmware updates, pin connections, or low-level serial control options.
UART
UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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