# SparkFun Pro RF - LoRa, 915MHz (SAMD21)

**Type:** Product page · **SKU:** WRL-15836 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-pro-rf-lora-915mhz-samd21-46884.html ([markdown](https://core-electronics.com.au/sparkfun-pro-rf-lora-915mhz-samd21-46884.html.md))

The SparkFun Pro RF is a LoRa®-enabled wireless board that marries a SAMD21 and a long-range RFM95W to make a compact and easy-to-use IoT Arduino board. With its...

## Pricing

- **Price:** $60.60 (inc GST) — $55.09 AUD, exc GST
- **Quantity discounts:** 5+ $53.44 (exc GST) · 25+ $52.34 (exc GST) · 100+ $50.14 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 21 and Aug 24.

## Restrictions

**For use in Australia**

- Operate only in bands and with settings that are permitted for your location and application. Check this product’s supported frequencies in the description/specs.
- If you intend to operate outside shared/licence‑exempt conditions (e.g. in other bands, at higher power, with high‑gain antennas, or extended duty cycles), you must have the appropriate authorisation.
 
**For use in other regions**

- Follow the spectrum rules for your country/region and select frequencies and settings accordingly.

A declaration of use will need to be submitted during checkout.

## Description

The SparkFun Pro RF is a LoRa®-enabled wireless board that marries a SAMD21 and a long-range RFM95W to make a compact and easy-to-use IoT Arduino board. With its fast MCU and excellent point to point data transmission in the 915MHz ISM band with LoRa Capabilities, the Pro RF is a great choice for anyone interested or experienced in utilizing long range data communication.

Every pin on the SparkFun Pro RF is accompanied with a ground connection making the buttons and LEDs easy to connect. In case you're building something to be embedded into clothing or other physically harsh environment the antenna includes a stress relief hole to make sure your wire antenna survives. A short (3 inch) wire antenna is sufficient for "short" distances (up to 1 mile line-of-sight), but we've also included a u.FL antennae connector for potentially longer distances.

The Pro RF also includes a power switch and 2-pin JST connector for powering from a lithium battery. With a Micro-B USB and the power switch in the off position, the Pro RF will charge the attached battery! The board programs over a reinforced Micro-B connector with a slim reset button that fits nicely on the side of the board. We've even added our popular [Qwiic](https://www.sparkfun.com/qwiic) connector to the edge of the board making it incredibly easy to add sensors and actuators without the need for solder or a soldering iron!

Thanks to the Arduino LoRa library, the RFM95W radio is an easy to use packet radio. But it doesn't stop there because closing a few jumpers on the underside of the SAMD21 Pro RF initiates LoRaWAN mode on the radio module making it a node in a distributed sensor network.

 [Get Started With the Sparkfun SAMD21 Pro RF Guide](https://learn.sparkfun.com/tutorials/sparkfun-samd21-pro-rf-hookup-guide)**Features**

- **SAMD21G18A**
    - Cortex M0
    - 256KB Flash Memory
    - 32MHz External Oscillator
    - 4 Digital and 5 Analog IO Pins with exclusive GND pins
- **Hope RFM95W LoRa modem**
    - Point to Point Radio capabilities
    - LoRa Enabled
    - Frequency range: 915 MHz
    - Spread factor: 6-12
    - Range up to 1 mile line of sight
    - U.FL Antenna
- **LiPo Battery Charger**
    - 500mA Charge Rate
- **Qwiic Enabled**
- Power LED disconnect jumper for low power applications.
- PTH pins for software debug (SWD)
 
**Revision Changes:** On this revision of the SAMD21 Pro RF, Sparkfun have made a few changes to improve the board, listed below. If users are unsure about which version they purchased, please refer to the product pictures.

- Fixed the VDDCORE pin connection issue
- Broken out an LED jumper for low power applications
- Added PTH pins for software debug (SWD)
 
**Documents**

- [Schematic](https://core-electronics.com.au/attachments/localcontent/SAMD21_Pro_RF_v11_Schematic_10644efde18.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/SAMD21_Pro_RF_v11_2570308de3e.zip)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/sparkfun-samd21-pro-rf-hookup-guide)
- [The Things Network](https://learn.sparkfun.com/tutorials/lorawan-with-prorf-and-the-things-network)
- [Graphical Datasheet](https://core-electronics.com.au/attachments/localcontent/SamProRF_Graphical_Datasheet_Updated_39539b4b2b7.pdf)
- Datasheets 
    - [RFM95W](https://core-electronics.com.au/attachments/localcontent/RFM95_96_97_98W_1960828e762.pdf)
    - [MCP73831](https://core-electronics.com.au/attachments/localcontent/33244_SPCN_9511094584a.pdf)
    - [SAMD21G](https://core-electronics.com.au/attachments/localcontent/Atmel-42181-SAM-D21_Datasheet_1768570ee4f.pdf)
- [GitHub Hardware Repo](https://github.com/sparkfun/SAMD21_Pro_RF/tree/v11)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/5/15836-sparkfun_pro_rf_-_lora__915mhz__samd21_-01.jpg)