GSM/GPRS/GNSS/Bluetooth HAT for Raspberry Pi, Based on SIM868OverviewThis 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/Zero/Zero W.
Supports SMS, phone call, GPRS, DTMF, HTTP, FTP, MMS, email, etc.
Support GPS, COMPASS, Glonass, LBS base station positioning, omni-positioningBluetooth 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 cardRTC 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 85.6kbpsUplink speed: max 85.6kbps
Coding schemes: CS-1\CS-2\CS-3\CS-4.
Supports PAP (Password Authentication Protocol) for PPP connection.
Supports PBCCHSupports 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 type33 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 specification: 3.0 + EDR.
Supports SPP, OPP, HFP/HSP, etc. Misc
Operating voltage: 5V.
Operating temperature: -40°C ~ 85°C.
Storage temperature: -45°C ~ 90°C