The SparkX Pro RF combines an ATmega32U4 microcontroller (Pro Micro) with a long-range RFM95W LoRa radio in a compact, battery-ready form factor. Operating in the 915 MHz ISM band, it provides excellent point-to-point data transmission for wireless sensor networks, remote monitoring, and IoT projects.

The board includes a LiPo connector with onboard charging, a power switch, and a Qwiic connector for quick I2C sensor hookups. Each I/O pin is paired with an adjacent ground connection for easy wiring. Closing a few jumpers exposes the DIO pins on the RFM95W, enabling LoRaWAN mode for use as a node on distributed networks such as The Things Network.

Key Features

• ATmega32U4 + RFM95W – Arduino-compatible microcontroller with integrated LoRa radio
• 915 MHz ISM Band – Long-range wireless communication (up to ~460 m line-of-sight with wire antenna; several kilometres with a proper antenna)
• LoRaWAN Ready – Jumper-selectable DIO pins for LoRaWAN node operation
• LiPo Battery Support – JST connector with onboard charger; charges even when switched off
• Qwiic Connector – Fast I2C sensor and actuator hookup
• Paired Ground Pins – Every I/O pin has an adjacent ground for convenient wiring
• Stress-Relief Antenna Hole – Protects wire antenna in embedded or wearable installations

Specifications

• Microcontroller: ATmega32U4
• Radio: RFM95W (SX1276-based)
• Frequency: 915 MHz
• USB: Micro-B (programming and charging)
• Battery: Single-cell LiPo via 2-pin JST

Ideal For

• Long-range wireless sensor networks
• LoRaWAN nodes (e.g., The Things Network)
• Remote environmental monitoring
• Portable and wearable IoT projects

Package Contents

• 1× SparkX Pro RF Board (915 MHz)

Resources

• Arduino LoRa Library (GitHub)
• The Things Network
• Pro Micro Hookup Guide (SparkFun)