SIM800L Micro SIM Card GPRS GSM Module

SIM800L Micro SIM Card GPRS GSM Module is a cellular transceiver that enables microcontrollers to communicate over the GSM network through SMS, voice calls, and GPRS data. This ultra-compact module utilizes a highly integrated Quad-band chip, allowing it to operate on global frequencies for seamless connectivity. Furthermore, its small form factor makes it an ideal choice for space-constrained IoT projects and remote monitoring systems. Consequently, developers can easily add wireless telecommunication capabilities to Arduino or STM32 platforms via simple AT commands. Therefore, you should consider this module for any project requiring reliable, long-distance data transmission where Wi-Fi or Bluetooth are unavailable.

Key Features:

• Quad-Band Connectivity: Supports 850, 900, 1800, and 1900 MHz frequencies, ensuring the module works on most GSM networks worldwide.
• Multiple Communication Modes: Handles SMS text messages, voice calls, and GPRS data packets for versatile project requirements.
• Micro SIM Slot: Features a high-quality pop-up Micro SIM card holder on the underside for easy card insertion and secure contact.
• Low Power Consumption: Includes a sleep mode that draws very little current, which significantly extends battery life in portable applications.
• Standard Serial Interface: Communicates through a TTL-level UART interface, allowing for direct connection to most 3.3 V or 5 V microcontrollers.

Technical Specifications:

• Operating Voltage: 3.4 V to 4.4 V (Recommended 4.0 V)
• Peak Current: ≈ 2.0 A (Occurs during burst transmissions)
• GPRS Class: Multi-slot class 12/10
• GPRS Data Speed: Max 85.6 kbps (Download/Upload)
• Logic Level: 2.8 V to 5.0 V tolerant (UART)
• Operating Temperature: −40°C to +85°C
• Compliance: Fully compliant with GSM phase 2/2±

Mechanical Specifications:

• Antenna Connector: IPX (U.FL) connector for external antennas or spring antenna soldering pad.
• Mounting: 2.54 mm pitch headers for easy integration with breadboards and PCBs.
• Status Indicator: Onboard LED signals network search or successful connection via blink rate.
• SIM Slot Type: Micro SIM

Dimensions:

• Module Length: ≈ 25.0 mm
• Module Width: ≈ 23.0 mm
• Module Height: ≈ 7.0 mm (including SIM holder)
• Weight: ≈ 5.5 g

Pinout and Wiring:

• VCC: Connect to a stable 3.7 V to 4.2 V power source capable of providing 2 A peaks.
• GND: Connect to the common system ground.
• TXD: Transmit pin. Connect to the RX pin of the microcontroller.
• RXD: Receive pin. Connect to the TX pin of the microcontroller.
• RST: Reset pin. Pull low to perform a hard reset of the module.
• RING: Ring indicator. Output goes low when a call or SMS is received.
• NET: Network status. Connect an LED or monitor via MCU to check signal status.

Datasheet Reference:

• Download SIM800L Hardware Design Datasheet

Commonly Used in:

• Arduino Projects: Adding cellular connectivity to DIY electronics and hobbyist builds.
• GPS Trackers: Working alongside a GPS module to report location data over long distances via SMS or GPRS.
• Remote Weather Stations: Transmitting environmental data from locations without Wi-Fi coverage.

Applications:

• SMS Alarm Systems: Notifying homeowners of security breaches via instant text messages.
• IoT Gateways: Serving as a backhaul link for sensor nodes in rural or industrial settings.
• Industrial Telemetry: Monitoring machinery performance and reporting status to a central server.
• Smart Irrigation: Controlling water pumps remotely via SMS commands or mobile apps.

Equivalent Models:

• SIM900L: An older but functionally similar predecessor widely used in the same ecosystem.
• SIM800C: A slightly different pinout version of the SIM800 family with similar GPRS features.
• A6/A7 Modules (Ai-Thinker): Alternative GSM modules, however, they utilize a different AT command set in some specific instances.

Package Includes:

• 1 x SIM800L Micro SIM Card GPRS GSM Module
• 1 x Spring Antenna
• 1 x Header Pin Set