SIM800C Module SMS Data Replaces SIM900A Development Board Glue Stick Antenna
SIM800C Module SMS Data Replaces SIM900A Development Board Glue Stick Antenna
SIM800C Module SMS Data Replaces SIM900A Development Board Glue Stick Antenna
The SIM800C Module is a compact GSM/GPRS communication module designed to enable SMS transmission, data connectivity, and voice capabilities in embedded systems and IoT applications. This module serves as a direct replacement for the legacy SIM900A, offering improved power efficiency, faster data speeds, and better thermal management for developers and system integrators. It solves the critical challenge of adding cellular connectivity to microcontroller-based projects without requiring bulky external modems or complex hardware integration.
Product Overview
The SIM800C operates on GSM 850/900/1800/1900 MHz frequencies, providing dual-band coverage across most global networks. The module integrates a complete GSM stack with built-in TCP/IP protocol support, enabling direct communication with remote servers via GPRS. Its quad-band architecture ensures compatibility with both 2G networks and legacy infrastructure, making it ideal for applications requiring long-term deployment stability. The module features a built-in power management system that optimizes current consumption during idle states, reducing overall system power requirements compared to earlier SIM900A variants.
The included glue stick antenna provides omnidirectional radiation patterns with approximately 2 dBi gain, suitable for indoor and outdoor installations without requiring external antenna modifications. The development board breakout includes all necessary passive components, voltage regulation circuitry, and serial interface headers for direct integration with Arduino, Raspberry Pi, and other microcontroller platforms. The module communicates via standard AT command interface over UART, allowing developers to implement custom firmware without proprietary APIs or licensing restrictions.
Key Specifications
| Specification | Details |
| Product Type | GSM/GPRS Cellular Communication Module |
| Brand | SIM800C Original |
| 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 |
| Frequency Bands | GSM 850/900/1800/1900 MHz Quad-Band |
| Data Connectivity | GPRS Class 12 with TCP/IP Protocol |
| Power Supply | 3.4V to 4.2V with integrated voltage regulator |
| Current Consumption | Idle 2mA, Active Transmission 500-2000mA |
| Interface | UART Serial at 9600-115200 baud |
| Antenna Type | Glue Stick Omnidirectional 2 dBi Gain |
Key Features
- Quad-Band GSM Coverage: Operates on 850/900/1800/1900 MHz frequencies ensuring global network compatibility and seamless roaming across multiple carrier networks
- GPRS Data Connectivity: Integrated GPRS Class 12 modem enables internet connectivity with download speeds up to 85.6 kbps for IoT and remote monitoring applications
- SMS and Voice Capable: Full support for SMS transmission, reception, and voice calling functionality through standard AT command interface
- Low Power Architecture: Optimized power management reduces idle current consumption to 2mA, extending battery life in portable and remote deployment scenarios
- Integrated Development Board: Pre-assembled breakout board includes voltage regulation, serial interface headers, and SIM card slot for immediate prototyping
- Standard AT Command Interface: Compatible with industry-standard GSM AT commands, enabling rapid firmware development without proprietary libraries
Applications and Use Cases
- Remote IoT Monitoring Systems: Deploy SIM800C in agricultural sensors, environmental monitoring stations, and industrial telemetry systems to transmit real-time data via GPRS to cloud platforms
- Emergency Alert Systems: Implement SMS-based notification networks for disaster management, security alarms, and critical infrastructure monitoring with guaranteed message delivery
- Vehicle Tracking and Fleet Management: Integrate the module in GPS-enabled tracking devices to transmit location data and receive command instructions via GPRS for real-time fleet visibility
- Smart Meter Data Collection: Deploy in utility metering applications to collect consumption data from remote locations and transmit readings to central billing systems via cellular networks
- Portable Medical Devices: Incorporate into wearable health monitoring systems and portable diagnostic equipment requiring reliable cellular connectivity for patient data transmission
- Vending Machine and Point-of-Sale Systems: Enable real-time transaction reporting and inventory management in remote retail locations without fixed broadband infrastructure
How to Use
Begin by connecting the SIM800C development board to your microcontroller via the UART interface, typically using pins RX and TX at 9600 baud rate. Insert an active 2G GSM SIM card into the onboard slot, ensuring the card is activated with a data plan from your service provider. Apply power through the regulated 3.7V input, and allow 10-15 seconds for the module to establish network registration, indicated by the STATUS LED blinking pattern. The module will automatically detect the strongest available network signal and register with the carrier.
Communicate with the module using standard AT commands through a serial terminal or your microcontroller firmware. Begin with basic commands like AT to verify communication, followed by AT+CPIN? to confirm SIM card recognition. Use AT+CMGS to send SMS messages, AT+CIPSTART for TCP connections, and AT+CIPSEND for data transmission. Implement proper error handling and timeout mechanisms in your firmware, as cellular operations may experience variable latency depending on network conditions. For GPRS connectivity, configure the APN settings specific to your carrier using AT+CSTT command before initiating data sessions.
Frequently Asked Questions
Is SIM800C a direct replacement for SIM900A modules?
Yes, the SIM800C is functionally compatible with SIM900A hardware and maintains identical AT command syntax. However, SIM800C offers improved power efficiency, faster GPRS speeds, and better thermal characteristics. The pinout is compatible, but you may need to adjust power supply filtering capacitors if your existing design uses undersized components. We recommend consulting the datasheet for your specific application requirements before migration.
What is the maximum data transfer speed achievable with this module?
The SIM800C supports GPRS Class 12, which theoretically provides download speeds up to 85.6 kbps and upload speeds up to 42.8 kbps. In practical deployments, actual speeds depend on network signal strength, carrier network congestion, and distance from base stations. Most users experience 30-60 kbps sustained throughput in urban areas. For applications requiring higher speeds, consider upgrading to 3G/4G modules like SIM7600 or SIM7000.
Can this module work with 5V microcontroller boards like Arduino Uno?
The SIM800C operates at 3.3V logic levels and cannot tolerate 5V inputs directly. You must use a voltage level shifter or resistor divider network to convert 5V TX signals from Arduino to 3.3V. The module's RX output is 3.3V and will work directly with Arduino's analog input pins. Alternatively, use Arduino boards with native 3.3V support like Arduino Zero or Arduino MKR series for simplified integration.
How do I handle power supply requirements for this module?
The SIM800C requires a stable 3.7V to 4.2V power supply capable of delivering peak currents up to 2A during transmission. Standard USB power supplies are often insufficient due to voltage drop across long cables. Use a dedicated lithium battery or a high-current regulated power supply with at least 2A capacity. Add a 100uF electrolytic capacitor and 10uF ceramic capacitor close to the module's power pins to buffer current spikes during GSM transmission bursts.
What antenna should I use for optimal signal reception?
The included glue stick antenna provides adequate performance for most applications with 2 dBi gain. For improved signal strength in weak coverage areas, upgrade to a 5 dBi external antenna with SMA connector. Ensure the antenna is positioned vertically and away from metal objects or water sources that cause signal attenuation. In indoor installations, position the module near windows or external walls to maximize signal penetration from nearby base stations.
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
Buy SIM800C Module SMS Data Replaces SIM900A Development Board Glue Stick Antenna Online in India
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