OPEnS_LTE

Wiki: LTE

An LTE module based on the Ublox SARA-R410M series chipset for IoT and remote sensing applications.

Three dimensional rendering of "OPEnS LTE" in Autodesk Fusion 360

"OPEnS LTE" measures 60mm x 26mm (Length x Width, rounded up to nearest integer).

Documentation Sections:

1. Breakdown of Repository Contents.
2. Instructions for Using "OPEnS LTE."
3. Technical Documentation (Specifications, Schematics, Simulation Files, etc.).
4. How to Procure "OPEnS LTE."

Breakdown of Repository Contents:

1. "LTE Extension Rev 3 Archive.f3z" --> Autodesk Fusion 360 archive file for most recent revision, Rev 3.
2. "README.md" --> Repository readme file.
3. "Rev 1.zip" --> Rev 1 manufacturing files for PCBWay, including Gerber, Pick-and-Place, and Bill of Materials.
4. "Rev 3.zip" --> Rev 3 manufacturing files for PCBWay, including Gerber, Pick-and-Place, and Bill of Materials.

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Functional prototype of "OPEnS LTE" (left), "OPEnS LTE" prototype connected to the internet (right)

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Instructions for Using "OPEnS LTE:"

Technical Documentation:

Pin Function:

• VCC - Module power supply for SARA-R410M and other onboard components.
• REF - Reference logic level for external microprocessor (supports 3.3V-5V logic).
• PWR - Pin to wakeup SARA-R410M.
• RST - Pin to reset SARA-R410M.
• TX - UART data out to microprocessor.
• RX - UART data in from microprocessor.

Operations:

• Power-on - Assert PWR pin to logical HIGH for 1-2 seconds, return to logical LOW.

• Reset - Assert RST pin to logical HIGH for 1-2 seconds, return to logical LOW.

• Setting microprocessor logic level - Connect REF to microprocessor logic level reference (usually power supply). For Adafruit Feather M0, connect REF to Feather M0 VCC.

Specification Tables:

Recommended Operating Voltages:

Pin	Mininum (V)	Typical (V)	Maximum (V)
VCC	3.2	3.8	4.2
REF	1.8	VCC	5.5
PWR	GND	GND	VCC
RST	GND	GND	VCC
TX	GND	~	REF
RX	GND	~	REF

Absolute Voltage Limits:

Pin	Mininum (V)	Maximum (V)
VCC	-0.5	5.2
REF	-0.5	6.5
PWR	-18	18
RST	-18	18
TX	-0.5	REF+0.5
RX	-0.5	REF+0.5

Schematic diagram for "OPEnS LTE:"