LTEm3F

Photo above is of the CR-LTEM3F prototype, minor usability adjustment have been incorporated into the design for the official production model. The model image shown incorporates the change to the GPIO/ADC connector updated since prototype.

Changes…

• SIM card holder has moved closer to edge to make card insertion\removal easier

• GPIO/ADC connections have been moved to card edge using a Molex pico-blade connector to lower vertical profile and make I/O connection compatible off-the-shelf ribbon assemblies

• Added host reset button to allow for that functionality when mounted above a Feather host board

• Moved all connections to top of board for easier assembly and verification

Features

• Quectel BG77 low-power LTE cellular module

  • LTE CAT-M1 and NB-IOT

  • Up to 588 kbps (DL)/ 1119 kbps (UL)

  • Advanced network interactive power saving modes including PSM and eDRX

• GNSS (GPS in US) location support with option power injection for active GNSS antenna systems

• USB interface with 3 virtual ports for AT, diagnostics/firmware, NMEA sentence output

• Low-power 3.3v device with independent LDO for local needs (sourced from Feather battery pin)

• Nano SIM socket compatible with all major carriers and MVNO providers

• High-speed buffered SPI interface (user selectable)

• LooUQ LTEmC software driver

  • C99 for portability, compatible with Arduino and other frameworks

  • Full method coverage for network management, protocols, file system, and GPIO/ADC

  • No AT command knowledge required, LTEmC manages it for you

• Communication Protocols

  • HTTP/HTTPS

  • MQTT/MQTTS

  • Sockets (TCP/UDP) with SSL support

• 6GB of persistent file system storage

• 7 GPIO ports

• 2 A/D ports (3.3v ref)

• 2 status indicators: power, network (can be disabled for power savings)

3D Step View