Sim800C GPRS/GSM Shield with Antenna
Sim800C GPRS/GSM Shield with Antenna
Sim800C GPRS/GSM Shield with Antenna
The Sim800C GPRS/GSM Shield is a compact cellular communication module that enables Arduino and microcontroller-based projects to connect to 2G GSM networks for SMS, voice calls, and GPRS data transmission. IoT developers, embedded systems engineers, and hardware enthusiasts use this shield to build remote monitoring systems, telemetry devices, and IoT applications that require cellular connectivity without relying on WiFi infrastructure. This module solves the critical problem of adding reliable cellular communication to edge devices operating in areas with no internet connectivity but adequate GSM network coverage.
Product Overview
The Sim800C GPRS/GSM Shield operates on quad-band GSM frequencies (850/900/1800/1900 MHz), making it compatible with cellular networks across India and globally. The module communicates with microcontrollers via UART serial interface using AT command protocol, allowing developers to control SMS transmission, voice calls, GPRS data sessions, and network registration through simple text-based commands. The integrated antenna connector and included antenna provide optimal signal reception, while the onboard voltage regulator handles power management from 5V microcontroller boards, delivering stable 3.8V to the SIM800C chipset.
This shield stands out due to its low power consumption (approximately 0.2mA in sleep mode and 1.5A during transmission), making it ideal for battery-powered IoT applications. The module supports both 1.8V and 3.3V logic levels through configurable jumpers, ensuring compatibility with various microcontroller platforms. Built-in protection circuits safeguard against voltage spikes and reverse polarity, while the compact form factor allows seamless integration into Arduino shields and custom PCB designs. The Sim800C chipset includes built-in TCP/IP stack for GPRS data transmission, enabling direct HTTP requests and socket-based communication without additional software layers.
Key Specifications
| Specification | Details |
| Product Type | GSM/GPRS Cellular Communication Shield |
| Brand | Sim800C (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 | 850/900/1800/1900 MHz (Quad-band) |
| Data Transfer Rate | GPRS Class 12, 85.6 kbps (downlink) |
| Operating Voltage | 3.8V to 4.2V (with 5V tolerant input) |
| Current Consumption | Sleep: 0.2mA, Idle: 25mA, Transmission: 1.5A peak |
| Interface | UART (TTL/CMOS logic levels) |
| SIM Card Type | Standard SIM (2FF) |
| Antenna | External antenna connector (SMA) with included antenna |
Key Features
- Quad-band GSM support (850/900/1800/1900 MHz) ensures global network compatibility across Indian telecom operators like Jio, Airtel, Vodafone, and BSNL
- Integrated GPRS Class 12 modem with TCP/IP stack enables direct HTTP requests and socket communication for cloud connectivity without additional gateways
- Ultra-low sleep mode consumption of 0.2mA makes this ideal for battery-powered IoT sensors and remote monitoring devices operating for months on single charge
- Dual voltage logic support (1.8V/3.3V selectable via jumper) provides compatibility with Arduino, Raspberry Pi, STM32, and PIC microcontroller platforms
- Hardware flow control (RTS/CTS) and software handshake prevent data loss during high-speed serial transmission between shield and microcontroller
- Built-in protection circuits guard against ESD, overvoltage, and reverse polarity, extending module lifespan in harsh industrial environments
Applications and Use Cases
- Remote environmental monitoring systems that transmit temperature, humidity, and air quality data via GPRS to cloud servers in areas without WiFi infrastructure
- Vehicle tracking and fleet management solutions using GPS modules combined with Sim800C for real-time location updates and SMS alerts to dispatch centers
- Smart water meter and electricity meter reading systems that collect consumption data and transmit billing information via GSM networks to utility companies
- Industrial alarm and alert systems that send SMS notifications for equipment failures, unauthorized access, or critical sensor readings to maintenance teams
- Agricultural IoT applications monitoring soil moisture, weather conditions, and pest detection with automated SMS alerts to farmers in remote villages
- Emergency communication devices and panic buttons that establish voice calls or SMS alerts through cellular networks independent of internet availability
How to Use
Begin by inserting an active SIM card (with GPRS plan) into the SIM800C module's SIM slot. Connect the shield to your Arduino or microcontroller via UART pins: TX to RX, RX to TX, GND to GND, and VCC to 5V power supply. Attach the included antenna to the SMA connector on the shield. Upload AT command-based firmware to your microcontroller using the Arduino IDE or your preferred development environment. Initialize serial communication at 9600 baud rate and send AT commands to test network registration: AT (should return OK), AT+CREG? (check network registration status), and AT+COPS? (verify operator name).
Once network registration is confirmed, you can send SMS using AT+CMGS command, initiate voice calls with ATD command, or establish GPRS connections for data transmission using AT+SAPBR commands for bearer settings and AT+HTTPINIT for HTTP operations. Configure interrupt pins for incoming call and SMS notifications to trigger microcontroller actions in real-time. For power-sensitive applications, enable sleep mode using AT+CSCLK=1 to reduce consumption to 0.2mA during idle periods. Always implement error handling for AT command responses (ERROR, +CME ERROR codes) and include watchdog timers to recover from module hangups. Test thoroughly with your specific SIM card provider before deploying in production, as some operators may require specific APN configurations for GPRS connectivity.
Frequently Asked Questions
Is the Sim800C compatible with 4G/LTE networks in India?
No, the Sim800C is a 2G GSM module and does not support 4G or LTE networks. However, it remains compatible with all Indian telecom operators' 2G GSM networks (Jio, Airtel, Vodafone, BSNL). If you require 4G connectivity, consider upgrading to Sim7600 or Sim7070 modules. For most IoT applications requiring only SMS and basic data transmission, 2G GSM is sufficient and more power-efficient than 4G alternatives.
What is the maximum GPRS data transfer speed and latency?
The Sim800C supports GPRS Class 12 with maximum downlink speed of 85.6 kbps and uplink of 42.8 kbps. Typical latency for GPRS connections ranges from 500ms to 2000ms depending on network congestion. While slower than modern broadband, this speed is adequate for IoT sensor data transmission, SMS-based alerts, and telemetry applications. For real-time video streaming or large file transfers, GPRS is not suitable, but for JSON data payloads under 10KB, transmission completes in under 2 seconds.
Can I use this shield with 3.3V microcontrollers like ESP32 or STM32?
Yes, the Sim800C shield includes a jumper to select between 1.8V and 3.3V logic levels, making it compatible with 3.3V microcontrollers like ESP32, STM32, and Raspberry Pi. However, ensure your power supply can deliver sufficient current (up to 1.5A during transmission). If powering from USB, use a dedicated 5V power bank with high current capacity to prevent voltage sag. The shield's onboard regulator handles voltage conversion, but external power is recommended for reliable operation.
How do I handle incoming SMS and call notifications?
The Sim800C sends unsolicited result codes (URCs) through the UART when SMS arrives (+CMT) or calls come in (+RING). Enable URC notifications by sending AT+CNMI=2,1,0,1 command, which instructs the module to forward incoming SMS details to your microcontroller. Your code should continuously monitor the serial buffer for these notifications and parse the sender's number and message content. Similarly, incoming calls trigger +RING codes, allowing your application to answer with ATA command or reject with ATH command. Implement proper serial buffering and timeout mechanisms to prevent message loss.
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 Tech Depot
- 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 Sim800C GPRS/GSM Shield with Antenna Online in India
Purchase the Sim800C GPRS/GSM Shield with Antenna online at The Tech Depot, 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 Sim800C GPRS/GSM Shield