Manuals+

SIMCOM A7670/A7672/A7676 Series

SIMCOM A7670/A7672/A7676 Series LTE CAT1 Module User Manual

Models: A7670E, A7670SA, A7672E, A7672SA, A7670G, A7672G, A7676E

1. Introduction

This manual provides essential information for the setup, operation, and maintenance of the SIMCOM A7670/A7672/A7676 series LTE CAT1 modules. These modules are 4G CAT1 Core Boards designed for Machine-to-Machine (M2M) and Internet of Things (IoT) applications, offering robust cellular communication capabilities including LTE, 4G, 2G, and Voice. Specific variants also support Global Navigation Satellite System (GNSS) and Bluetooth (BT) functionalities.

The modules are available in different configurations:

  • LASE variants: Do not support GPS/GNSS.
  • FASE variants: Support GNSS and Bluetooth.

2. Safety Information

Please read and understand all safety precautions before using the module. Failure to follow these instructions may result in injury, damage to the product, or other hazards.

  • Power Supply: Ensure the power supply voltage is within the specified range (5-16V DC). Incorrect voltage can damage the module.
  • Electrostatic Discharge (ESD): Handle the module with care, using appropriate ESD protection measures to prevent damage to sensitive electronic components.
  • Operating Environment: Do not expose the module to extreme temperatures, humidity, or corrosive environments. The operating temperature range is -40°C to 85°C.
  • Antenna Connection: Connect antennas securely to the IPEX 1 interface. Ensure correct antenna types are used for LTE and GPS (if applicable).
  • Modifications: Do not modify the module unless explicitly instructed. Unauthorized modifications can void the warranty and cause malfunction.

3. Package Contents

The standard package typically includes:

  • SIMCOM A7670/A7672/A7676 Series Core Board (selected model)

Depending on the purchased variant, additional accessories may be included:

  • LTE 4G Full-Band Antenna
  • GPS Antenna (for FASE variants)
  • FPC (Flexible Printed Circuit) cable
SIMCOM A7672E module with LTE and GPS antennas
Figure 3.1: Example package contents including the module, LTE antenna, and GPS antenna.

4. Product Overview

The SIMCOM A7670/A7672/A7676 series modules are compact 4G CAT1 core boards. They feature a 23-pin (2.54mm) package and integrate various functionalities for M2M and IoT applications.

4.1 Key Components

SIMCOM module board layout showing NANO SIM, MIRCO USB, and module placement
Figure 4.1: Module board layout highlighting key components like NANO SIM slot and Micro USB port.
  • Module: The core SIMCOM cellular module.
  • NANO SIM Slot: For inserting your cellular Subscriber Identity Module.
  • Micro USB Port: For power supply (5-16V DC) and data communication.
  • IPEX 1 Antenna Interface: For connecting external LTE and/or GPS antennas.
  • LED Indicators: Power and Network status lights.
  • UART Interface: For TTL (3.3-4.3V) serial communication.

4.2 Module Variants

The series includes several models, each with specific regional band support and feature sets:

Image showing various SIMCOM A7670, A7672, A7676 module variants
Figure 4.2: Overview of different SIMCOM A767x module variants.
  • A7670E (LASE/FASE)
  • A7670SA (LASE/FASE)
  • A7672E (LASE/FASE)
  • A7672SA (LASE/FASE)
  • A7670G (LABE)
  • A7672G (LABE)
  • A7676E

Note the distinction: LASE variants do not support GPS, while FASE variants support GNSS+BT.

4.3 Product Overview Video

Video 4.1: A brief overview of the module's compatibility design and product roadmap.

5. Specifications

The following table provides general specifications for the SIMCOM A7670/A7672/A7676 series. Specific network bands and features may vary by model. Refer to the detailed product parameters for your specific module variant.

Table 5.1: General Product Parameters
ProjectDescription
Product Name4G CAT1 Core Board
Package23PIN (2.54mm)
PowerUSB 5-16V DC
UART3.3-4.3V TTL (Default)
Antenna interfaceIPEX 1
SIM CardMIRCO SIM
LEDPower/Network light
USBYes
SIZE44.45 * 31.75 * 12.44 mm (Including pin height)
Operating temperature-40°C - 85°C
Network speedLTE: 10Mbps (DL) / 5Mbps (UL), GPRS: 85.6Kbps
Network protocolTCP/IP/IPV4/IPV6/MultiPDP/FTP/FTPS/HTTP/HTTPS/DNS/RNDIS/ECM/PPP
FunctionLTE CAT1 + 4G + 2G + Voice (+ BT + GNSS for FASE variants)

For detailed network band information for specific models, please refer to the product datasheet or the following images:

Product parameters table for CC-MCore-A7672SA-FASE
Figure 5.1: Product Parameters for CC-MCore-A7672SA-FASE.
Product parameters table for CC-MCore-A7670G-LABE
Figure 5.2: Product Parameters for CC-MCore-A7670G-LABE.
Product parameters table for CC-MCore-A7672E-FASE
Figure 5.3: Product Parameters for CC-MCore-A7672E-FASE.
Product parameters table for CC-MCore-A7670SA-FASE
Figure 5.4: Product Parameters for CC-MCore-A7670SA-FASE.
Product parameters table for CC-MCore-A7676E
Figure 5.5: Product Parameters for CC-MCore-A7676E.
Product parameters table for CC-MCore-A7670E-LASE
Figure 5.6: Product Parameters for CC-MCore-A7670E-LASE.
Product parameters table for CC-MCore-A7670E-FASE
Figure 5.7: Product Parameters for CC-MCore-A7670E-FASE.
Product parameters table for CC-MCore-A7672E-LASE
Figure 5.8: Product Parameters for CC-MCore-A7672E-LASE.
Product parameters table for CC-MCore-A7672G-LABE
Figure 5.9: Product Parameters for CC-MCore-A7672G-LABE.
Product parameters table for CC-MCore-A7672SA-LASE
Figure 5.10: Product Parameters for CC-MCore-A7672SA-LASE.

6. Setup

Follow these steps to set up your SIMCOM A7670/A7672/A7676 series module.

6.1 SIM Card Installation

  1. Locate the MIRCO SIM card slot on the module board.
  2. Carefully insert your activated MIRCO SIM card into the slot until it clicks into place. Ensure correct orientation.

6.2 Antenna Connection

  1. Identify the IPEX 1 antenna interfaces on the module.
  2. Connect the LTE 4G Full-Band antenna to the main cellular antenna port.
  3. If you have a FASE variant module (supporting GNSS), connect the GPS antenna to the dedicated GPS antenna port.
  4. Ensure all antenna connections are secure.

6.3 Power Supply and Data Connection

  1. Connect a 5-16V DC power supply to the module via the Micro USB port or the designated power pins.
  2. For data communication and initial configuration, connect the Micro USB port to your computer or development board. Alternatively, use the UART interface (3.3-4.3V TTL).

6.4 Power-On Solution for Hardware Developers

The product defaults to automatic boot. For hardware developers requiring a POWRKEY boot solution, it may be necessary to modify the board. Please note the following:

Diagram showing modification for POWRKEY power-on solution
Figure 6.1: Modification for POWRKEY power-on solution. Remove material with bit number R3 and C5 to short 3.3V on PWK/RST pin.
  • Before shipment, the seller can configure as required.
  • Upon receiving the goods, hardware developers may need to remove the material with bit number R3 and C5 to short 3.3V on the PWK/RST pin for the POWRKEY solution.
  • This modification is not considered a product defect.

7. Operating

Once the module is set up, you can begin operating it for communication and data transfer.

7.1 Powering On

The module typically boots automatically upon receiving power. Observe the LED indicators:

  • Power LED: Indicates the module is powered on.
  • Network LED: Indicates network status (e.g., blinking for network registration, solid for active connection). Refer to the module's specific datasheet for detailed LED behavior.

    • 7.2 Communication via AT Commands

    The module is primarily controlled using AT commands sent via the UART or USB serial interface. A terminal program (e.g., PuTTY, Termite) can be used to send commands and receive responses.

    • Basic AT Commands:
      • AT: Checks module responsiveness. (Expected response: OK)
      • ATI: Requests module identification information.
      • AT+CSQ: Checks signal quality.
      • AT+CREG?: Checks network registration status.
    • Refer to the SIMCOM AT Command Set document for a comprehensive list of commands and their usage for cellular, SMS, voice, and (for FASE variants) GNSS/Bluetooth functions.

    7.3 GNSS Functionality (FASE Variants Only)

    For FASE models, ensure the GPS antenna is connected. GNSS functions can be accessed and configured via specific AT commands. This allows for positioning using GPS, GLONASS, BeiDou, Galileo, and QZSS technologies.

    8. User Tips

    • Datasheet Access: If you require the full datasheet for your specific module variant, contact the seller.
    • Quantity Adjustment: The seller is flexible with order quantities; if you need a specific number of units not listed, contact them to adjust the order.
    • Quality Assurance: Prioritize quality over price. Ensure you are receiving genuine products for reliable performance.
    • Firmware Updates: Keep the module's firmware updated for optimal performance and access to the latest features. Check with the seller or SIMCOM for available updates.
    • Communication: Good communication with the seller can help resolve any technical queries or issues efficiently.

    9. Troubleshooting

    This section addresses common issues you might encounter with your SIMCOM module.

    9.1 No Power

    • Check Power Supply: Ensure the 5-16V DC power supply is correctly connected and providing power.
    • USB Cable: If using USB for power, try a different USB cable or port.
    • Power LED: Verify the Power LED is illuminated.

    9.2 No Network Registration

    • SIM Card: Ensure the MIRCO SIM card is correctly inserted and activated with a valid cellular plan.
    • Antenna: Check that the LTE antenna is securely connected to the IPEX 1 port.
    • Signal Strength: Use the AT+CSQ command to check signal quality. If signal is weak, try relocating the module or using a higher-gain antenna.
    • Network LED: Observe the Network LED for status indications (e.g., blinking for searching, solid for registered).
    • APN Settings: Verify that the Access Point Name (APN) settings are correctly configured for your cellular provider using AT commands.

    9.3 No GPS/GNSS Fix (FASE Variants Only)

    • GPS Antenna: Ensure the GPS antenna is securely connected to its dedicated IPEX 1 port.
    • Outdoor Visibility: For initial fix, the module needs clear line-of-sight to the sky. Test outdoors or near a window.
    • AT Commands: Use specific GNSS AT commands to enable and query GPS data.

    9.4 Communication Issues (UART/USB)

    • Driver Installation: Ensure necessary USB drivers are installed on your computer.
    • Baud Rate: Verify that the terminal program's baud rate matches the module's UART baud rate (typically 115200 bps by default).
    • Wiring: Double-check UART (TX, RX, GND) connections.

    10. Maintenance

    • Cleaning: Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning.
    • Environmental Conditions: Store and operate the module within its specified temperature and humidity ranges to ensure longevity.
    • Firmware Updates: Periodically check for firmware updates from SIMCOM or the seller. Firmware updates can improve performance, add features, and fix bugs.
    • Physical Inspection: Regularly inspect the module for any signs of physical damage, loose connections, or corrosion.

    11. Warranty and Support

    For warranty information, technical support, or to obtain datasheets and detailed AT command documentation, please contact the seller directly. They can provide specific assistance related to your purchase and module variant.

    Seller: Jaguar Tech Store

    Contact Information: Refer to your purchase records or the seller's store page on AliExpress for the most up-to-date contact details.