SIM800L V2.0 5V Wireless GSM GPRS MODULE Quad-Band MOD31
The SIM800L V2.0 (MOD31) is a member of SIMCom’s SIM800 series GSM engines and is presented in the AT-command manual as a compact cellular engine that exposes a standard AT command interface for controlling voice, SMS and packet data services. The manual frames the SIM800 family as a modem-style GSM/GPRS engine that is controlled by a host via serial AT commands, intended to be embedded into customer equipment rather than used as a finished product.
The manual emphasizes the module’s command-driven design: it supports the standard 3GPP AT command sets plus SIMCom proprietary extensions so that a host microcontroller or PC can manage network registration, calls, messaging and GPRS data sessions via textual AT sequences. The document describes command categories for voice/SMS/GPRS/TCP-IP/HTTP/FTP/MMS and many service functions, showing that the SIM800L is designed to be operated and scripted entirely through these well-documented commands.
Engineering detail in the manual highlights per-variant differences (the SIM800L is one of several SIM800 family variants), noting specific supported commands and hardware signals (for example jamming-detection pin and ADC support differences). The manual positions the SIM800L as a flexible embedded communications engine whose behaviour and services are exposed at the AT level making it suitable wherever a compact, commendable GSM/GPRS engine is needed in a larger device.
Features:
- Standard AT-command control (3GPP TS 27.007 / 27.005 + SIMCom extensions).
- Support for voice calls and SMS control via AT commands.
- GPRS / packet data and TCP/IP commands (including TCP/UDP, multi-IP, PPP).
- HTTP and FTP client AT command support.
- MMS and email command support exposed in the AT set.
- TTS (text-to-speech) and local recording/playback command support.
- GPIO, ADC and audio channel control via AT commands (including CHFA, SGPIO, CMIC).
- Jamming-detection signal support (module PIN designated for JD status).
Pin Description:
- 5v: Power interface Power the module CONNECT TO DC 5v
- GND: Connect to GND.
- VDD: TTL UART interface The TTL UART serial interface, you can connect the MCU like 51MCU or ARM or
- MSP430 directly. The pin of VDD is used to match the voltage of the TTL.
- SIM_TXD: SIM module Transmitter.
- SIM_RXD: SIM module Receiver.
- GND: If this pin is unused, keep open.
- RST: RST the module, if this pin is unused, keep open.
Specifications:
| Parameter | Value |
|---|---|
| Chip: | SIM800L |
| Interface Type: | TTL UART |
| Baud Rate: | Adaptive (default), supports 2400 – 115200 bps |
| Input Supply Voltage: | 5 – 20 V DC |
| Power Interface: | 2.54 mm Pin Header / Micro USB |
| Antenna Interface: | ASMA / IPX |
| Voice Interface: | 3.5 mm Audio Jack |
| Network Support: | Quad-Band 850 / 900 / 1800 / 1900 MHz – works on GSM networks worldwide |
| PCB Dimensions (mm): | Length 40.1 × Width 27.1 × Height 11.1 |
| Approx. Weight: | 20 g |
| Mounting Hole Dimensions: | 3.8 mm |
Applications:
- SMS-Based Alert and Notification Systems.
- Remote Data Logging and Telemetry.
- GPS Tracking and Asset Management.
- IoT Device Communication and Control.
- Mobile Robotics and Unmanned Vehicle Control.
- Remote Sensor and Actuator Control.
- Wireless Payment Terminals.
- Vehicle Security and Anti-Theft Systems.
- Smart Agriculture Monitoring Systems.
- Emergency Call and Fall Detection Devices.
- Vending Machine Inventory Management.
- Remote Equipment Diagnostics and Health Monitoring.
- Environmental Parameter Monitoring.
- Home Automation and Security Systems.
- Two-Factor Authentication via SMS.
Package Includes :
- 1x SIM800L V2.0 5V Wireless GSM GPRS MODULE.
- 1x L-Shape Antenna