SparkFun

LoRaSerial 915MHz Enclosed Kit

Name: LoRaSerial 915MHz Enclosed Kit
Brand: SparkFun
SKU: SF-WRL-20029
Price: 392.15 AUD
Availability: InStock

· MPN: WRL-20029

LoRa & Cellular Modules Wireless & Connectivity

$392.15 |

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This kit gives you a pair of enclosed serial radio modems for sending serial data from one point to another over LoRa. It is designed for applications that n...

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This kit gives you a pair of enclosed serial radio modems for sending serial data from one point to another over LoRa. It is designed for applications that need simple, reliable data reporting beyond typical WiFi or Bluetooth® range.

The radios use a 1 Watt 915MHz transceiver and an open-source protocol to send AES-encrypted data. SparkFun reports regular 9mi (15km) line-of-sight transmissions using two LoRaSerial radios with a larger 5.8dBi antenna on the transmitter and the stock 1/2 wave dipole antenna on the receiver.

LoRaSerial supports point-to-point links as well as multipoint broadcasts, making it useful for GNSS RTK and other geospatial setups where one device needs to share data with multiple receivers. Pairing is handled with a simple training button method that generates and shares a new random network ID and AES encryption key.

The radios are configurable for frequency, channels, dwell time, power output and other settings to help suit local requirements. LoRaSerial operates at the physical layer of LoRa and is not intended for LoRaWAN networks.

Features:

LoRa SX1276 Based
256-bit AES GCM encryption
AT command set
Built-in Frequency Hopping Spread Spectrum (FHSS) technology
Point-To-Point and Multipoint configurations
3D Printed Enclosure (May darken over time)
USB-C connection available for industrial systems and single-board computers (SBCs like Raspberry Pi)
6-pin JST connector available for embedded systems (5V and 3.3V tolerant I/O) with flow control
Small footprint, lightweight, easily mountable
Open source Software and Hardware

Specifications:

Power output: 1 Watt (30dBm) power output
Radio band: 915MHz unlicensed band radio with 902-928MHz configurable output
Air speeds: Configurable air speeds from 400 bps (40 bytes per second) to 19200bps (1920 bytes per second)
Standard serial data rates: Configurable standard serial data rates from 2400 to 115200bps
RSSI indicator: 4-LED RSSI Indicator
Operation: 3.3 to 5V operation

Documentation available from SparkFun includes a schematic, Eagle files, quick start guide, product manual, AT command set, datasheets, LoRa PHY notes and hardware repository.

Jargon buster

Plain-language definitions for the technical terms used above.

AT command set: An AT command set is a text-based control language sent over a serial terminal to configure a device. It matters because you can change settings such as baud rate and flow control without writing custom firmware.
GNSS: GNSS stands for Global Navigation Satellite System, an umbrella term for satellite positioning networks such as GPS, GLONASS, Galileo and BeiDou. Receivers use these satellites to determine position, and high-precision units can output a steady stream of serial position data.
LED: A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
LoRa: LoRa is a long-range, low-power wireless radio technology often used for telemetry, remote sensors and other links that send small amounts of data over long distances. It is distinct from Bluetooth and WiFi, so sharing a connector or pinout with LoRa hardware does not mean a device actually uses LoRa.
RTK: Real-Time Kinematic positioning is a GNSS technique that uses correction data from a base station to greatly improve location accuracy. It matters if you need centimetre-level positioning for robotics, mapping, surveying, or tracking rather than ordinary metre-level GPS accuracy.
USB-C: USB-C is a small, reversible USB connector that can carry power, data and, on some devices, video over a single cable. The same connector can range from charging only to high-speed data, so the functions a given port actually supports vary.