Generic SIM808 GPRS/GSM GPS Shield User Manual

1. Introduction

The Generic SIM808 GPRS/GSM GPS Shield is a versatile 2-in-1 development board designed for integration with microcontrollers, such as Arduino. It combines GPRS/GSM communication capabilities with GPS positioning functionality, enabling a wide range of applications including location tracking, remote monitoring, and IoT projects. This manual provides essential information for setting up, operating, and maintaining your SIM808 shield.

Figure 1: Top view of the SIM808 GPRS/GSM GPS Shield, showing the SIM808 module, SIM card slot, and various connectors.

2. Included Components

The package typically includes the following components:

• SIM808 GPRS/GSM GPS Shield
• MICRO SIMCARD (for initial setup, may vary by seller)
• GSM Antenna
• GPS Antenna
• Four headphone ports (Type I)
• Arduino-compatible shield headers

Figure 2: The SIM808 Shield accompanied by its GSM and GPS antennas.

3. Setup Instructions

3.1. SIM Card Installation

1. Ensure the SIM808 shield is powered off.
2. Locate the Micro SIM card slot on the shield.
3. Gently insert an activated Micro SIM card into the slot, ensuring the correct orientation. The notched corner of the SIM card should align with the notch on the slot.
4. Push the SIM card until it clicks into place. To remove, push again to release.

Figure 3: Detailed view of the SIM card slot and surrounding components on the SIM808 Shield.

3.2. Antenna Connection

1. Identify the GSM antenna connector (typically marked "GSM" or "NET") and the GPS antenna connector (typically marked "GPS").
2. Carefully connect the GSM antenna to its designated connector.
3. Carefully connect the GPS antenna to its designated connector.
4. Ensure both antennas are securely attached. For optimal performance, position the antennas away from other electronic components and metal surfaces.

3.3. Connecting to a Development Board (e.g., Arduino)

1. Align the pins of the SIM808 shield with the corresponding headers on your Arduino or compatible development board.
2. Gently press the shield onto the development board, ensuring all pins are correctly seated.
3. The shield typically uses hardware or software serial communication. Refer to your specific development board's documentation and the SIM808 module's datasheet for correct pin configuration and library usage.

Figure 4: The SIM808 Shield mounted on a development board, illustrating its integration.

4. Operating Instructions

4.1. Powering On

Once connected to your development board, power the board via its standard power input (e.g., USB or DC jack). The SIM808 shield will draw power from the development board. Observe the status LEDs on the SIM808 shield; a blinking network LED indicates it is searching for a network, while a slower blink typically indicates a registered network connection.

4.2. GSM/GPRS Communication

The SIM808 module communicates via AT commands. You can send AT commands from your development board to the shield using a serial interface. Common functions include:

• Making/Receiving Calls: Use ATD (dial) and ATA (answer) commands.
• Sending/Receiving SMS: Use AT+CMGF (text mode), AT+CMGS (send SMS), AT+CMGR (read SMS) commands.
• GPRS Data Connection: Configure APN settings using AT+CSTT, AT+CIICR, AT+CIFSR for internet connectivity.

Refer to the SIM808 AT Command Manual for a comprehensive list of commands and their usage.

4.3. GPS Functionality

The integrated GPS module also uses AT commands to retrieve location data. Key commands include:

• Enabling GPS: AT+CGNSPWR=1
• Getting NMEA Data: AT+CGNSINF
• Disabling GPS: AT+CGNSPWR=0

For best GPS performance, ensure the GPS antenna has a clear view of the sky.

5. Maintenance

• Cleaning: Keep the shield clean and free from dust. Use a soft, dry cloth for cleaning. Avoid liquid cleaners.
• Storage: Store the shield in a dry, anti-static environment when not in use.
• Handling: Handle the board by its edges to avoid touching components, especially to prevent electrostatic discharge (ESD).
• Firmware Updates: Periodically check the manufacturer's website or community forums for any available firmware updates for the SIM808 module, which may improve performance or add features.

6. Troubleshooting

7. Specifications