SIMCOM 7670C 4G LTE GSM Module TTL

The SIMCOM 7670C 4G LTE GSM Module TTL is a multi-band cellular communication board that connects to 4G LTE (Long Term Evolution), 3G WCDMA, and 2G GSM networks using a standard SIM card. The simcom 7670c module communicates with a host microcontroller over UART (a two-wire serial data line) using AT commands (short text instructions that control the module functions). Data speeds reach up to 10 Mbps over the LTE Cat 1 standard, which is fast enough to stream sensor data, run MQTT (a lightweight IoT messaging protocol), and handle HTTP requests simultaneously. The SMA antenna connector accepts external antennas, letting you improve signal strength in weak coverage areas.

One technical detail the sim7670c datasheet clarifies — the 7670C uses the LTE Cat 1 standard, not the faster Cat 4 or Cat 6. Cat 1 tops out at 10 Mbps download, which is more than sufficient for IoT data payloads but will not suit applications that need continuous high-speed video streaming. The baud rate defaults to 115200 bps, which is faster than older 2G modules and handles larger AT command responses without buffer overflow issues. The honest trade-off is that this module requires a data-capable SIM plan with 4G LTE coverage. Voice calls and SMS work on the same module, but GPRS-only SIM cards will not activate the 4G features.

The sim a7670c 4g lte module with antenna board works with the Arduino IDE, PlatformIO, and any serial terminal that supports AT command testing over UART. Engineers building cellular IoT nodes, students learning 4G communication, and makers replacing older 2G modules all use it regularly. To start, insert an active 4G SIM card, power the board at 3.3V to 5V, and send AT over UART at 115200 bps to confirm the module registers. StemVolt provide this module for fast dispatch across India.

Related Products:

• Check out the SIM900A Wireless GSM GPRS Module with Antenna

Features:

• LTE Cat 1 radio delivers up to 10 Mbps download speed for reliable cloud data uploads.
• UART TTL interface at 115200 bps default connects directly to Arduino and similar serial pins.
• Multi-network support covers 4G LTE, 3G WCDMA, and 2G GSM on a single module automatically.

Technical specifications:

Applications:

• Remote door alarm uses this 4G module to send an SMS when motion is detected at night.
• Smart water meter reads flow data and sends readings to a cloud dashboard over LTE every hour.
• SIMCOM 7670C 4G LTE GSM Module TTL connects a weather station to a server over MQTT at 10 Mbps.
• 4G IoT data logger reads UART sensor output and posts timestamped packets to an HTTP endpoint automatically.

Package includes:

• 1 x SIMCOM 7670C 4G LTE GSM Module TTL