SIM808 Module GSM GPRS GPS Development Board
SIM808 Module GSM GPRS GPS Development Board
SIM808 Module GSM GPRS GPS Development Board
The SIM808 Module is a quad-band GSM/GPRS microcontroller with integrated GPS functionality, enabling IoT developers to build location-aware applications with cellular connectivity. Professional engineers and hobbyists use this module for fleet tracking systems, GPS-enabled asset management, remote monitoring devices, and IoT applications requiring real-time geolocation data. This module solves the critical challenge of combining cellular communication, data transmission, and precise GPS positioning in a single compact form factor, eliminating the need for multiple separate components.
Product Overview
The SIM808 Module operates on a dual-core architecture combining a GSM/GPRS transceiver with an independent GPS receiver, allowing simultaneous cellular and satellite communication. The module supports quad-band GSM frequencies (850/900/1800/1900 MHz) for global cellular coverage, while the integrated u-blox GPS chipset delivers positioning accuracy within 10 meters under clear sky conditions. The module communicates with microcontroller boards via UART serial interface using AT commands, making integration straightforward with Arduino, Raspberry Pi, STM32, and other embedded platforms. Power consumption is optimized with sleep modes consuming as low as 0.5mA, making it suitable for battery-powered applications.
What distinguishes the SIM808 from competing solutions is its true integration of three distinct technologies on a single PCB with minimal external components required. The module includes built-in voltage regulation, antenna connectors for both GSM and GPS signals, and a dedicated SIM card slot supporting both 1.8V and 3.3V SIM cards. The development board variant includes breakout headers, status LEDs for network and GPS lock indication, and reset circuitry, significantly accelerating prototyping timelines. The module's firmware is field-upgradeable, allowing access to the latest feature sets and bug fixes throughout the product lifecycle.
Key Specifications
| Specification | Details |
| Product Type | GSM/GPRS/GPS Development Board 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 | Quad-band 850/900/1800/1900 MHz |
| Data Connectivity | GPRS Class 12, 114.4 kbps downlink speed |
| GPS Accuracy | 10 meters (CEP), u-blox chipset |
| Communication Interface | UART serial, 9600-115200 baud rate |
| Operating Voltage | 3.4V to 4.2V (battery) or 5V via USB |
| Operating Temperature | -40°C to +85°C |
Key Features
- Quad-band GSM/GPRS connectivity enabling global cellular coverage across 850/900/1800/1900 MHz frequency bands with automatic band selection
- Integrated u-blox GPS receiver with 10-meter accuracy and sub-second acquisition time for real-time location tracking without external GPS modules
- UART-based AT command interface compatible with all major microcontroller platforms including Arduino, Raspberry Pi, STM32, and PIC microcontrollers
- Dual SIM card slot support with automatic voltage switching between 1.8V and 3.3V SIM cards for maximum compatibility
- Built-in voltage regulation and power management with sleep modes consuming only 0.5mA for extended battery life in portable applications
- Development board includes status LEDs for network registration, GPS lock, and power indication, plus reset button for convenient debugging
- Field-upgradeable firmware via serial interface allowing access to latest features and performance improvements
Applications and Use Cases
- Fleet Management Systems: Real-time vehicle tracking with GPS coordinates transmitted via GPRS to cloud servers, enabling route optimization and driver behavior monitoring for logistics companies
- Asset Tracking Devices: Portable trackers for high-value equipment, containers, and machinery that transmit location data over cellular networks with battery life extending weeks through intelligent power management
- IoT Environmental Monitoring: Remote weather stations and pollution sensors that combine GPS-tagged data collection with cellular transmission for distributed environmental monitoring networks
- Emergency Response Systems: Personal emergency beacons and wearable SOS devices that automatically transmit precise GPS coordinates to emergency services via cellular networks
- Smart Agriculture: Precision farming applications including drone flight logging, equipment geofencing, and field boundary mapping with cellular data transmission to farm management platforms
- Vehicle Telematics: OBD-II integration for insurance tracking, vehicle diagnostics, and predictive maintenance systems combining GPS location with cellular data upload
How to Use
Begin by connecting the SIM808 development board to your microcontroller via UART pins (RX, TX, GND, and 5V power). Insert an active GSM SIM card into the onboard slot, ensuring proper orientation with the metallic contacts facing downward. Attach the GSM antenna to the primary antenna connector and the GPS antenna to the secondary connector, positioning both antennas away from metal surfaces for optimal signal reception. Power the module and observe the status LEDs: the GSM LED will blink indicating network search, and once registered to the network, it will remain steady. The GPS LED will blink while acquiring satellite signals and stabilize once lock is achieved.
Communicate with the module using AT commands through the serial interface at 9600 baud rate. Send AT to verify connectivity, use AT+CPIN? to check SIM status, AT+CREG? to verify network registration, and AT+GPSSTART to initiate GPS positioning. For location data, query AT+GPSINFO to retrieve latitude, longitude, altitude, and timestamp in NMEA format. Implement error handling for network timeouts and GPS acquisition delays, as satellite lock may require 30-60 seconds on first acquisition. Store AT command responses in buffers and parse the returned data to extract coordinates, which can then be transmitted to remote servers via GPRS using AT+SAPBR commands for GPRS connection management and AT+HTTPPOST for HTTP data transmission.
Frequently Asked Questions
What is the difference between SIM808 and SIM900A modules?
The SIM808 integrates GPS functionality directly on the module, whereas SIM900A requires an external GPS module connected separately. SIM808 operates at lower power consumption due to optimized hardware integration, making it superior for battery-powered applications. SIM808 also supports GPRS Class 12 with faster data speeds compared to SIM900A. For applications requiring integrated location tracking without external components, SIM808 is the preferred choice.
How long does GPS acquisition take on the SIM808?
Cold start acquisition typically requires 30-60 seconds when the module has no prior satellite ephemeris data. Warm start acquisition takes 5-10 seconds when recent ephemeris data is cached in the module's memory. Hot start acquisition completes in under 1 second when the module maintains continuous power and recent position history. To optimize acquisition time, maintain continuous power to the GPS receiver between fix requests and implement assisted GPS using network-based location services as a fallback when satellite signals are unavailable.
Can the SIM808 transmit data over GPRS while acquiring GPS signals simultaneously?
Yes, the SIM808 architecture supports simultaneous GSM/GPRS communication and GPS positioning due to independent hardware cores. However, sustained high-bandwidth GPRS transfers may slightly increase power consumption and potentially delay GPS acquisition in weak signal environments. For optimal performance, implement intelligent scheduling where GPS acquisition occurs during GPRS idle periods, or use low-bandwidth GPRS transfers that do not monopolize the cellular modem resources.
What power supply requirements does the SIM808 have?
The SIM808 requires 3.4V to 4.2V DC supply for battery operation or 5V via USB connector on the development board. Peak current consumption during GSM transmission reaches 2A, requiring a power supply capable of delivering this surge current without voltage sag. For battery-powered applications, use a 2000-3000mAh lithium battery with low-impedance discharge characteristics. Include a 100uF capacitor at the power input pins to buffer transient current spikes during GSM transmission bursts.
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.
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- Returns: 7-day return policy on manufacturing defects only
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