1. Produktet er slutview
The SIMCOM A7680C is an ultra-small, ultra-thin LTE Cat 1 module designed for the Chinese market. It supports LTE-TDD/LTE-FDD wireless communication standards, offering a maximum downlink rate of 10Mbps and a maximum uplink rate of 5Mbps. This module is compatible with SIMCom's classic 2G products (SIM800C, SIM868, etc.), facilitating a smooth transition to LTE products for compact and feature-rich terminal designs.
The A7680C integrates multiple network protocols and supports mainstream software operating system drivers (USB drivers for Windows, Linux, and Android). It features powerful expansion capabilities through industry-standard interfaces like UART and GPIO, making it suitable for various IoT applications such as vehicle communication terminals, security terminals, POS systems, industrial routers, and telemedicine devices.
2. Opsætningsvejledning
2.1. Fysiske forbindelser
- SIM-kort isætning: Locate the SIM card slot on the board (refer to Figure 1). Gently insert a 1.8V or 3V (U)SIM card into the slot until it clicks into place. Ensure correct orientation.
- Antenneforbindelse: Connect the appropriate antennas to the GSM ANTA and GPS ANTA connectors on the board. For optimal performance, ensure antennas are securely attached.
- Strømforsyning: Connect a power source within the supported voltage range of 3.4V to 4.2V (typical 3.8V) to the designated power pins. Refer to the pinout diagram (Figure 3) for exact power connections.
- USB-forbindelse: For data communication and power, connect the Micro USB port on the board to your computer or host device using a compatible USB cable.
- UART/Serial Connection: If using serial communication, connect your host device to the UART pins as indicated in the pinout diagram (Figure 3).
2.2. Driver installation
Before operating the module, ensure the necessary USB drivers are installed on your host system. The A7680C supports USB drivers for:
- Microsoft Windows 7/8/10
- Linux
- Android (RIL support for Android 5.0/6.0/7.0/8.0/9.0)
Drivers are typically provided by the module manufacturer or can be found on their official support webwebsted.
3. Betjeningsvejledning
3.1. AT Command Operation
The A7680C module is primarily controlled via AT commands sent through the serial port (UART) or USB virtual serial port. Refer to the official SIMCOM A7680C AT Command Set documentation for a comprehensive list of commands and their usage.
3.2. Datatransmission
The module supports LTE Cat 1 data transmission with:
- Upstream: Maximum 5Mbps
- Downlink: Up to 10Mbps
It supports various network protocols including TCP/IP/IPV4/IPV6/MultiPDP/FTP/HTTP/DNS, RNDIS/ECM/PPP, and TLS.
3.3. Software Functions
The A7680C offers a range of software functionalities:
- Remote Upgrade (FOTA): Supports Firmware Over-The-Air updates for convenient software maintenance.
- Base Station Positioning (LBS): Provides location information based on cellular network data.
- SSL Protocol: Sikrer sikker kommunikation.
- TTS Support: Text-to-Speech functionality.
- MQTT Support: For lightweight messaging protocol in IoT applications.
- WIFI Scan: Ability to scan for Wi-Fi networks (note: this is a cellular module, Wi-Fi scan functionality may be for specific use cases or integrated features).
4. Vedligeholdelse
To ensure the longevity and optimal performance of your A7680C module, follow these maintenance guidelines:
- Softwareopdateringer: Regularly check for and apply firmware updates using the USB port software upgrade or FOTA (Firmware Over-The-Air) remote software upgrade feature. This ensures you have the latest features and bug fixes.
- Miljøforhold: Operate the module within its specified working temperature range of -40℃ to +85℃. Avoid exposure to extreme temperatures, high humidity, dust, or corrosive environments.
- Rensning: Hold modulet rent og fri for støv. Brug en blød, tør klud til rengøring. Brug ikke flydende rengøringsmidler eller opløsningsmidler.
- Fysisk inspektion: Undersøg regelmæssigt boardet for tegn på fysisk skade, løse forbindelser eller korrosion.
5. Fejlfinding
Hvis du støder på problemer med dit A7680C-modul, kan du overveje følgende fejlfindingstrin:
- Ingen strøm: Verify that the power supply is connected correctly and provides the specified voltage (3.4V ~ 4.2V). Check power indicator LEDs on the board, if available.
- Modul ikke fundet af vært: Ensure USB drivers are correctly installed. Try a different USB port or cable. For serial connections, verify UART wiring and baud rate settings.
- Ingen netværksforbindelse: Check if the SIM card is inserted correctly and is active. Ensure antennas are properly connected. Verify network coverage in your area. Use AT commands to query network registration status (e.g., AT+CREG?).
- Problemer med AT-kommando: Confirm that the serial port settings (baud rate, data bits, parity, stop bits) match the module's requirements. Ensure the AT command syntax is correct according to the official documentation.
- Software Functionality Problems: Ensure the module firmware is up to date. Check for any specific error codes returned by AT commands related to the function (e.g., LBS, MQTT).
For advanced troubleshooting, consult the SIMCOM A7680C documentation or contact technical support.
6. Specifikationer
6.1. Generelle kendetegn
- Modelnummer: A7680C Board
- Oprindelse: Fastlandet Kina
- Frekvensbånd:
- LTE-TDD: B34/B38/B39/B40/B41
- LTE-FDD: B1/B3/B5/B8
- Understøttet bindtage Område: 3.4V ~ 4.2V (typical: 3.8V)
- Arbejdstemperatur: -40℃ ~ +85℃
- Dimensioner: 15.7mm x 17.6mm x 2.1mm (Module only)
- Vægt: TBD
- Kontrolgrænseflade: AT command operation
6.2. Datatransmission
- LTE Cat 1 Upstream: Max 5Mbps
- LTE Cat 1 Downlink: Op til 10 Mbps
6.3. Softwarefunktioner
- OS Driver Support: Microsoft Windows 7/8/10, Linux, Android
- Android RIL Support: Android 5.0/6.0/7.0/8.0/9.0
- Software Upgrade: USB port software upgrade, FOTA remote software upgrade
- Network Protocols: TCP/IP/IPV4/IPV6/MultiPDP/FTP/HTTP/DNS, RNDIS/ECM/PPP, TLS
- Additional Features: LBS (Location-Based Services), TTS (Text-to-Speech), MQTT, WIFI Scan
6.4. Hardware grænseflader
- USB2.0
- Seriel port (UART)
- (U)SIM Card (1.8V/3V)
- Analog lyd
- ADC (Analog-til-digital-konverter)
- GPIO (General Purpose Input/Output)
- Antenna Interfaces: Main Set (GSM ANTA, GPS ANTA, BT ANTA)
6.5. Certificeringer
- 3C#/SRRC#/NAL#
- RoHS#/REACH#
7. Brugertips
- Kompatibilitetskontrol: Always verify the module's frequency bands (LTE-TDD B34/B38/B39/B40/B41, LTE-FDD B1/B3/B5/B8) are compatible with your regional cellular network before deployment.
- Stabil strømforsyning: Sørg for en stabil strømforsyning inden for den anbefalede voltage range (3.4V-4.2V) to prevent unexpected behavior or damage to the module. Fluctuations can lead to connectivity issues.
- Antennekvalitet: Use high-quality, impedance-matched antennas for both GSM and GPS to maximize signal reception and transmission efficiency.
- AT Command Reference: Keep the official SIMCOM A7680C AT Command Set documentation handy for quick reference during development and debugging.
8. Garanti og support
8.1. Begrænset garanti
This product comes with a 12-month Manufacturer's Limited Warranty. This warranty covers defective items but excludes items damaged and/or misused after receipt. Please retain your proof of purchase for warranty claims.
8.2. Teknisk support
For technical assistance, detailed documentation, or specific inquiries regarding the SIMCOM A7680C module, please refer to the official SIMCOM website or contact the seller/manufacturer directly. Provide your product model and a detailed description of the issue for efficient support.
