7Semi EC200U LTE Cat-1 GNSS Industrial Modem USB-C

Connect the modem's UART TX/RX pins to your microcontroller's serial port at a default baud rate of 115200. Power the module via USB-C or external 5-26V supply. Insert a Nano SIM card. You can then send standard 3GPP AT commands (e.g., AT+CGATT? to check network registration, AT+CGPS=1 to enable GNSS) to configure cellular data and retrieve location information. Ensure proper grounding and use a stable power source during command interaction.

While specific sleep current figures for the EC200U are not provided in the core specs, LTE Cat-1 modems typically draw 10-50mA in connected idle states and can peak over 500mA during data transmission. For lowest power operation, utilize the module's built-in power saving modes via AT commands (e.g., AT+QSCLK). Always provide a clean, stable power supply within the 5V-26V range, and consider an external switching regulator for battery-powered applications to maximize efficiency.

The EC200U's USB (via Type-C) and UART interfaces are typically designed for alternative use, not concurrent operation. The primary communication channel is selected based on your host system connection. For development and AT command debugging, USB is convenient. For final embedded deployment with a microcontroller, the UART is standard. Refer to the manufacturer's datasheet for any specific multiplexing or configuration commands to switch between interfaces if supported.

The module includes an integrated FPC (Flexible Printed Circuit) antenna for both LTE and GNSS, which is sufficient for many applications. For enhanced performance or specific mounting needs, you can connect external antennas via compatible connectors (if present on your specific variant). Ensure any external LTE antenna covers bands B1/B3/B5/B8/B34/B38-41 and has proper impedance matching (50Ω). A passive GNSS antenna may be added if an external connector is available for improved satellite reception.