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7Semi EG800AK 4G LTE Cat-1bis Modem with GNSS, USB-C and UART AT Command Interface for ESP32, STM32 and Raspberry Pi IoT Projects
The 7Semi EG800AK is a compact 4G LTE Cat-1 bis industrial modem board built around the Quectel EG800AK-CN module, with integrated GNSS for location tracking. It supports LTE-FDD bands B1, B3, B5 and B8, and LTE-TDD bands B34, B38, B39, B40 and B41. This covers the networks of major operators in India and China without a band-specific variant. GNSS support for GPS, BDS, GLONASS and Galileo adds positioning to the same board, which suits asset trackers, fleet devices and remote monitoring units. Cat-1 bis delivers up to 10 Mbps download and 5 Mbps upload, enough for telemetry, OTA firmware updates and cloud data streaming without the cost and power draw of Cat-4 or higher modems.
The board connects to ESP32, STM32, RP2040, Arduino, Raspberry Pi and Linux SBCs through UART TX and RX pins, using the standard AT command set with no USB-to-serial adapter. The USB Type-C port handles power input, host PC development, firmware flashing and diagnostics, with USB serial drivers for Windows 10/11, Linux and Android. A VIN input accepts 5V to 26V DC, and onboard regulation supplies the modem rails. Dedicated KEY and RESET pins let the host microcontroller power the modem on and off and reset it without pressing buttons, which helps in unattended deployments. A Nano SIM slot, a U.FL and IPEX antenna connector, status LEDs, four mounting holes and an external LTE antenna complete the kit.
Key Features
- Modem IC: Quectel EG800AK-CN LTE Cat-1 bis single-antenna modem for 4G connectivity
- GNSS Positioning: Supports GPS, BDS, GLONASS and Galileo for location and asset-tracking applications
- LTE Speeds: Up to 10 Mbps download and 5 Mbps upload for telemetry, gateway uplink and OTA updates
- LTE-FDD Bands: B1, B3, B5 and B8
- LTE-TDD Bands: B34, B38, B39, B40 and B41
- USB Type-C Interface: Power input, host PC communication, firmware flashing and diagnostics
- UART Communication: TX and RX pins for direct AT command control from ESP32, STM32, RP2040, Arduino and Raspberry Pi
- AT Command Interface: Standard Quectel AT command set for network registration, data connection management and status queries
- Wide Input Voltage: 5V via USB Type-C or 5V to 26V DC on the VIN pin
- KEY Control Pin: Programmatic modem power-on and power-off from the host microcontroller
- RESET Control Pin: Hardware reset without manual intervention in unattended setups
- Nano SIM Slot: Onboard slot for standard operator SIM cards
- U.FL and IPEX Antenna Connector: External LTE antenna included in the kit
- Status LEDs: Network status and power status indicators
- Industrial Operating Range: -30 C to 60 C operating temperature
- Compact Form Factor: 62 x 40 mm PCB with 4 mounting holes for enclosure and panel integration
Applications
- ESP32, STM32, RP2040, Arduino and Raspberry Pi IoT builds that need 4G connectivity over UART without a USB-to-serial adapter
- Vehicle, fleet and asset trackers that combine LTE connectivity with GPS, BDS, GLONASS and Galileo positioning
- Industrial automation and remote monitoring systems with automated modem control through the KEY and RESET pins
- Cloud-connected IoT devices that need OTA firmware updates and real-time sensor data streaming
- Industrial gateways, POS terminals, data cards and smart safety devices that need a compact panel-mount modem
- Unattended remote deployments that need automated power-on, reset and connection management
