Open Stack is a self-contained 4G LTE IoT connectivity board designed for RTOS-based C applications directly on the Quectel EC200U series LTE module, eliminating the need for an external MCU like Arduino, ESP32, or Raspberry Pi. The absence of an MCU reduces power consumption, BOM cost, and physical footprint.
The board offers multi-band LTE with GSM fallback, GNSS, Bluetooth 4.2, and supports IPv4/IPv6 client and server modes. It features a USB Type-C port, a Nano SIM card slot, LTE/GNSS/BLE antenna connectors, an OLED display, status LEDs, control buttons, and a 40-pin Raspberry Pi HAT-compatible GPIO header. Networking protocols include TCP/UDP, SSL/TLS, HTTP/HTTPS, MQTT, LwM2M, CoAP, FTP/FTPS, and PPP, fitting for asset tracking, industrial monitoring, BLE-to-LTE gateways, remote infrastructure, and consistently connected IoT setups without extra controller hardware.
Specifications of Open Stack:
- Cellular Module – Quectel EC200U-CN series (EC200UCNAA-N05-SGNSA) module
- Cellular Connectivity:
- LTE FDD – B1/B3/B5/B8
- LTE TDD – B34/B38/B39/B40/B41
- GSM – 900 / 1800 MHz (fallback)
- Data Rates – Up to 10 Mbps (DL) / 5 Mbps (UL)
- GNSS – GPS, GLONASS, Galileo, BeiDou (BDS), QZSS
- Bluetooth – Bluetooth 4.2 (BR/EDR + BLE)
- Networking Protocols – TCP, UDP, SSL/TLS, HTTP/HTTPS, MQTT, LwM2M, CoAP, FTP/FTPS, PPP, IPv4, IPv6
- Antenna – 3x U.FL connector for LTE, GNSS, and Bluetooth
- Cellular Connectivity:
- Display – 128×32 thin OLED display
- USB – 1x USB Type-C for power, programming, and debugging
- Expansion – 40-pin header compatible with Raspberry Pi HATs
- Misc
- Network, power, and status LEDs
- Boot, reset, and user buttons
- Dimensions – TBD
- Operating Temperature (Module): -40°C to +85°C
