2 IN 1 GSM GPS SIM808 Module

The SIM808 is a compact dual-function cellular and GNSS module that integrates GSM/GPRS communication with GPS positioning in a single integrated circuit, eliminating the need for separate modules in IoT and embedded applications. Professional engineers and IoT developers utilize this module for real-time asset tracking, fleet management, remote monitoring systems, and location-based services where space and power constraints demand integrated solutions. This module solves the critical challenge of implementing simultaneous cellular connectivity and precise GPS positioning without consuming excessive board real estate or power budget in resource-constrained embedded systems.

Product Overview

The SIM808 module operates on a quad-band GSM architecture supporting 850MHz, 900MHz, 1800MHz, and 1900MHz frequencies, enabling global cellular coverage across multiple regions and carriers. The integrated GPS receiver provides TTFF (Time To First Fix) of approximately 35 seconds in cold start conditions and 1 second in warm start, with positioning accuracy within 10 meters under optimal conditions. The module communicates via standard UART interface operating at 9600 to 115200 baud rates, simplifying integration with microcontrollers like Arduino, STM32, and Raspberry Pi. Power consumption is optimized through intelligent sleep modes, drawing approximately 2.8mA in sleep state and 80-100mA during active GSM operation, making it suitable for battery-powered applications.

What distinguishes the SIM808 from competing solutions is its unified architecture that eliminates the complexity of managing two separate modules with independent power supplies and communication protocols. The module features a built-in real-time clock (RTC) with backup battery, allowing timestamp accuracy even during power loss events. Its robust industrial-grade design operates across extended temperature ranges from -40°C to +85°C, ensuring reliability in automotive, outdoor monitoring, and harsh environmental deployments. The module supports both voice calls and SMS functionality alongside data transmission, providing multiple communication channels for critical alert systems and emergency notifications.

Key Specifications

Specification	Details
Product Type	Dual GSM/GPRS and GPS Module
Brand	SIM808 (SIMCOM)
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
GSM Bands	850MHz, 900MHz, 1800MHz, 1900MHz (Quad-band)
GPRS	Class 12, 4 timeslots, EDGE supported
GPS Sensitivity	-159dBm (tracking), -145dBm (acquisition)
GPS Accuracy	10 meters (2D RMS), Cold start TTFF 35 seconds
Communication Interface	UART (9600-115200 baud), SPI optional
Operating Voltage	3.4V to 4.2V (typical 3.8V)
Operating Temperature	-40°C to +85°C
Module Dimensions	24mm x 24mm x 3.5mm

Key Features

• Integrated Quad-band GSM/GPRS with Class 12 EDGE support for reliable global cellular connectivity and high-speed data transmission up to 236.8 kbps
• Standalone GPS receiver with -159dBm tracking sensitivity and 10-meter accuracy, eliminating dependency on external GNSS modules
• UART interface with configurable baud rates from 9600 to 115200, enabling seamless integration with 3.3V and 5V microcontroller platforms
• Low-power sleep mode consuming only 2.8mA, extending battery life in portable and IoT applications by 70-80% compared to traditional dual-module solutions
• Built-in RTC with backup battery maintaining accurate timestamps during power loss for critical event logging and data integrity
• Voice call and SMS support alongside GPRS data, providing redundant communication pathways for emergency alerts and multi-channel notifications
• Industrial-grade design rated for -40°C to +85°C operation, ensuring reliability in automotive, outdoor surveillance, and extreme environment deployments

Applications and Use Cases

• Real-time vehicle tracking and fleet management systems where GPS coordinates must be transmitted to cloud servers via GPRS for live dashboard monitoring and historical route analysis
• Asset tracking for logistics and supply chain operations, providing location updates and geofencing alerts when assets enter or exit predefined geographic zones
• Emergency response systems in ambulances and police vehicles requiring simultaneous voice communication, SMS notifications, and GPS coordinates for rapid response coordination
• Remote environmental monitoring stations for agriculture and weather forecasting, transmitting sensor data alongside GPS location via GPRS to centralized data collection platforms
• IoT-enabled smart parking solutions where vehicles transmit their GPS location and availability status through GPRS networks for real-time parking space allocation
• Personal safety devices and elderly care wearables providing continuous GPS tracking with SOS functionality through voice calls and SMS alerts to designated contacts

How to Use

Begin by connecting the SIM808 module to your microcontroller using a serial UART connection: TX pin to RX pin, RX pin to TX pin, GND to ground, and VCC to a regulated 3.8V power supply with minimum 2A capacity to handle transient current spikes during GSM transmission. Insert a valid GSM SIM card into the module's SIM slot and ensure the antenna connectors are properly seated with appropriate cellular and GPS antennas. Initialize the module using AT command sequences starting with AT to verify communication, followed by AT+CPIN? to check SIM card status and AT+CREG? to confirm network registration before attempting data transmission.

For GPS functionality, send AT+CGNSPWR=1 to enable the GPS receiver and allow 30-60 seconds for the first fix acquisition depending on environmental conditions. Monitor GPS data using AT+CGNSINF command which returns latitude, longitude, altitude, and UTC timestamp. For GPRS connectivity, configure the access point name using AT+SAPBR commands, then establish data connection with AT+SAPBR=1,3 to enable internet functionality. Implement proper error handling for AT command responses, as network conditions and satellite availability affect module behavior. Use AT+CMGF=1 for text mode SMS operations and AT+CMGS for sending SMS messages containing GPS coordinates or sensor readings to remote servers or user phones.

Frequently Asked Questions

What is the difference between SIM808 and separate GSM and GPS modules?

The SIM808 integrates both GSM/GPRS and GPS functionality into a single module measuring 24x24mm, consuming 40-50% less board space compared to two separate modules. This integrated approach reduces power consumption by approximately 30-40% since both subsystems share a common power management circuit and antenna switching mechanism. Additionally, a single UART interface simplifies microcontroller integration and firmware development, eliminating the complexity of managing two independent serial communication channels and synchronizing data from separate modules.

Can the SIM808 module work without an active GSM plan?

Yes, the GPS receiver operates independently of GSM connectivity and requires only power supply and antenna connection to acquire satellite signals and provide positioning data. However, to transmit GPS coordinates to remote servers or receive location-based services, an active GSM plan with GPRS data capability is necessary. Many applications use the module in dual-mode where GPS provides local positioning while GPRS periodically uploads data to cloud servers, optimizing data transmission costs by reducing upload frequency.

What antenna types are required for optimal performance?

The SIM808 requires two separate antennas: a GSM antenna (typically 2G cellular antenna with 5dBi gain) and a GPS antenna (active or passive patch antenna with minimum 3dBi gain for GPS). Active GPS antennas with built-in LNA (Low Noise Amplifier) provide superior sensitivity in urban canyons and indoor environments, improving TTFF from 35 seconds to 15-20 seconds. Antenna placement is critical; position them away from metal objects and high-current traces on the PCB to prevent signal degradation and multipath interference.

What is the typical power consumption and battery life?

The SIM808 draws approximately 2.8mA in sleep mode, 15-20mA during GPS acquisition, and 80-100mA during active GSM transmission. For a 2000mAh battery with periodic GPS polling every 60 seconds and GPRS transmission every 5 minutes, typical battery life ranges from 8-12 hours. Implementing intelligent sleep scheduling and reducing transmission frequency can extend battery life to 24-48 hours, making the module suitable for portable tracking devices and wearable applications.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy 2 IN 1 GSM GPS SIM808 Module Online in India

Purchase the 2 IN 1 GSM GPS SIM808 Module online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on 2 IN 1 GSM GPS SIM