1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of the SIMcom SIM7672G/NA/E Core Board. This device is a versatile LTE Cat1 modem designed for Machine-to-Machine (M2M) and Internet of Things (IoT) applications, featuring a Qualcomm chip and optional GNSS capabilities. It supports data communication and is voice-free.
The SIM7672 series offers strong compatibility, wide voltage support (5-16V power supply), and is highly integrated with power supply, SIM card, TTL, and RF components. It supports multi-frequency bands including 2G/3G/4G/CATM/NB/5G Band.
2. Basic Characteristics
The SIMcom SIM7672 series core boards are designed with several key features:
- Strong Compatibility: MCore full range package identical.
- Wide Voltage: Supports 5-16V power supply, M2M level.
- Abundant Data: Provides drivers, module firmware (FW), and STM code.
- Highly Integrated: Includes power supply, SIM card slot, TTL, and RF components.
- Multi-frequency Products: Supports 2G/3G/4G/CATM/NB/5G bands.
- FAE Online Support: Technical support available (China time only).
3. Setup Instructions
To set up your SIMcom SIM7672 Core Board, follow these steps:
- Power Supply: Connect a 5-16V DC power supply to the VBUS and GND pins.
- SIM Card Installation: Insert a MIRCO SIM card into the designated SIM card slot. Ensure correct orientation.
- Antenna Connection: Connect the appropriate antenna to the IPEX 1 antenna interface.
- USB Connection: For initial setup and communication, connect the module to your computer via the USB port.
- UART Connection: For serial communication, connect your host device to the UART pins (3.3V TTL default).
For detailed wiring diagrams and PCB layouts, refer to the core board datasheet information summary available at: Core Board Datasheet.
A video demonstrating the setup of similar SIMcom LTE CAT1 LPWA boards is available:
Video 1: Overview of SIMcom LTE CAT1 LPWA Boards Series. This video provides a visual guide to the various SIMcom LTE CAT1 LPWA boards, which share similar setup principles.
4. Operating Instructions
The SIM7672 series modules are designed for data communication in M2M and IoT applications. Once powered and connected, the module can be controlled via AT commands sent over the UART interface or through the USB interface.
4.1. Initial Power-On
After connecting the power supply, the module will initiate. The LED indicators (Power/Network light) will provide status feedback. Refer to the datasheet for specific LED behavior patterns.
4.2. Software and Drivers
Ensure you have the necessary drivers installed on your host system. Drivers and module firmware are provided by SIMcom. For ESP32 integration, refer to the dedicated documentation:
- Drivers & Firmware: COSYS Introduction Folder
- ESP32 Documentation: ESP32 Documentation Folder
4.3. Network Communication
The module supports LTE Cat1 for data transmission. Use AT commands to configure network settings, establish connections, and send/receive data. The network protocol stack includes TCP/IP, IPv4/IPv6, MultiPDP, FTP/FTPS, HTTP/HTTPS, TPS/DNS, RNDIS, ECM, and PPP.
4.4. GNSS Functionality (Optional)
If your module includes GNSS, connect a GNSS antenna to the dedicated connector. Use AT commands to access positioning data.
5. Maintenance
The SIM7672 Core Board is a robust device, but proper handling and maintenance can extend its lifespan and ensure reliable operation.
- Environmental Conditions: Operate the module within the specified temperature range of -40°C to 85°C. Avoid extreme humidity and corrosive environments.
- Cleaning: Keep the board clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Firmware Updates: Periodically check for firmware updates from SIMcom to ensure optimal performance and security. Follow the provided instructions for safe firmware upgrades.
- Antenna Care: Ensure antennas are securely connected and not damaged. Damaged antennas can impair signal reception and transmission.
6. Troubleshooting
If you encounter issues with your SIM7672 Core Board, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Module not powering on | Incorrect power supply voltage or polarity; loose power connection. | Verify power supply is 5-16V DC and connected correctly. Check all power connections. |
| No network connection | SIM card not inserted correctly or not activated; antenna not connected; incorrect AT commands; out of network coverage. | Reinsert SIM card, ensure it's active. Connect antenna. Check AT command syntax. Move to an area with better network coverage. |
| USB not recognized by PC | Missing or incorrect USB drivers. | Install the latest USB drivers from the COSYS Introduction folder. |
| UART communication issues | Incorrect baud rate; wrong pin connections; voltage level mismatch. | Verify baud rate settings. Check UART pin connections (TX, RX, GND). Ensure 3.3V TTL compatibility. |
For further assistance, contact FAE online support (China time only) or refer to the comprehensive documentation provided.
7. Specifications
Below are the key product parameters for the SIMcom SIM7672 series core boards:
7.1. SIM7672NA (North America Version)
| Project | Description |
|---|---|
| Product Name | 4G CAT1 Core Board |
| Model | DD-MCore-SIM7672NA |
| Package | 7PIN(2.54mm) |
| Power | 5-16V DC |
| UART | 3.3V TTL (Default) |
| Antenna interface | IPEX 1 |
| SIM Card | MIRCO SIM |
| LED | Power/Network light |
| USB | Y |
| SIZE | 37*37*12.4 (Including pin height) |
| Operating temperature | -40°C~85°C |
| Network Band | LTE-FDD: B2/B4/B5/B12/B13/B66 |
| Network speed | LTE: 10Mbps(DL) 5Mbps(UL) |
| Network protocol | TCP/IP/IPv4/IPv6/MultiPDP/FTP/FTPS/HTTP/HTTPS/DNS/RNDIS/ECM/PPP |
| Function | LTE CAT1+4G+GPS |
7.2. SIM7672E (Europe Version)
| Project | Description |
|---|---|
| Product Name | 4G CAT1 Core Board |
| Model | DD-MCore-SIM7672E |
| Package | 7PIN(2.54mm) |
| Power | 5-16V DC |
| UART | 3.3V TTL (Default) |
| Antenna interface | IPEX 1 |
| SIM Card | MIRCO SIM |
| LED | Power/Network light |
| USB | Y |
| SIZE | 37*37*12.4 (Including pin height) |
| Operating temperature | -40°C~85°C |
| Network Band | LTE-FDD: B1/B3/B5/B7/B8/B20/B28 |
| Network speed | LTE: 10Mbps(DL) 5Mbps(UL) |
| Network protocol | TCP/IP/IPv4/IPv6/MultiPDP/FTP/FTPS/HTTP/HTTPS/DNS/RNDIS/ECM/PPP |
| Function | LTE CAT1+4G+Qualcomm chip |
7.3. SIM7672G (Global Version)
| Project | Description |
|---|---|
| Product Name | 4G CAT1 Core Board |
| Model | DD-MCore-SIM7672G |
| Package | 7PIN(2.54mm) |
| Power | 5-16V DC |
| UART | 3.3V TTL (Default) |
| Antenna interface | IPEX 1 |
| SIM Card | MIRCO SIM |
| LED | Power/Network light |
| USB | Y |
| SIZE | 37*37*12.4 (Including pin height) |
| Operating temperature | -40°C~85°C |
| Network Band | LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66; LTE-TDD: B34/B38/B39/B40/B41 |
| Network speed | LTE: 10Mbps(DL) 5Mbps(UL) |
| Network protocol | TCP/IP/IPv4/IPv6/MultiPDP/FTP/FTPS/HTTP/HTTPS/DNS/RNDIS/ECM/PPP |
| Function | LTE CAT1+4G+Qualcomm chip |
8. Applications
The SIMcom SIM7672 series core boards are suitable for a wide range of M2M and IoT applications, including but not limited to:
- Smart Energy: Charging piles, data monitoring for energy infrastructure.
- Smart Industry: Remote control, data monitoring, and cloud platform integration for industrial equipment.
- Intelligent Agriculture: Agricultural irrigation, greenhouse monitoring, animal husbandry, and aquaculture.
- Sharing Economy: Vending machines, toy machines, coffee machines, massage chairs, and other shared devices requiring connectivity.
9. User Tips
- When integrating with ESP32, ensure you consult the specific ESP32 documentation provided by COSYS for seamless operation.
- For optimal signal reception, ensure the antenna is placed in an unobstructed location.
- Always double-check pin connections before applying power to prevent damage to the module or connected devices.
- Keep the module's operating temperature within the specified range to maintain stability and longevity.
10. Warranty and Support
For technical support and inquiries, please contact COSYS via email at Cosys@cosyswireless.com. FAE online support is available during China time.
Additional resources, including antenna information, COSYS introduction, ESP32 documentation, product posters, and core board datasheets, can be found in the following Google Drive folders:
- Antenna Information Series: Link
- COSYS Introduction: Link
- ESP32 Documentation: Link
- Product Poster: Link
- Core Board Datasheet Information Summary: Link
A user manual in PDF format is also available for download: User manual (PDF).