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RFM69HCW-900S2

Radio Transceiver Breakout

The RFM69HCW-900S2 is a radio transceiver breakout from Adafruit. View the full RFM69HCW-900S2 datasheet below including key specifications.

RFM69HCW-900S2 shares its datasheet with RFM69HCW-433S2, whose page lists every part number it covers.

Official RFM69HCW-900S2 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Adafruit

RFM69HCW-900S2 Key Specifications

ParameterValue
Range~500 m line of sight (up to ~5 km with directional antennas)
ChipsetSX1231
Frequency433 MHz (this breakout); 900 MHz variant sold separately
InterfaceSPI
EncryptionAES-128
ModulationFSK
Output Power+13 dBm to +20 dBm (up to 100 mW), software selectable
Transmit Current50 mA (+13 dBm) to 150 mA (+20 dBm)
Breakout Dimensions25.3mm x 29.3mm x 3.5mm
Receive/Listen Current~30 mA
Breakout Power/Logic Inputup to 35 V DC (3.3 V regulator and level shifter)

RFM69HCW-900S2 Overview

Part: RFM69HCW-433S2 — Adafruit

Type: Radio Transceiver Breakout

Description: A 433 MHz FSK packet radio breakout board based on the SX1231 module, offering +13 to +20 dBm power output, AES-128 encryption, and an SPI interface, capable of line-of-sight ranges up to 500 meters.

Operating Conditions:

  • Supply voltage: 3.3V (module); compatible with 3V or 5V logic
  • Operating temperature: null
  • Frequency: 433 MHz

Absolute Maximum Ratings:

  • Max supply voltage: 35V DC (breakout board input)
  • Max continuous current: null
  • Max junction/storage temperature: null

Key Specs:

  • Chipset: SX1231 based
  • Power Output: +13 to +20 dBm (up to 100 mW)
  • Transmit Current Draw: 50mA (+13 dBm) to 150mA (+20dBm)
  • Active Listening Current Draw: ~30mA
  • Line-of-sight Range: approx. 500 meters
  • Interface: SPI
  • Encryption: AES-128

Features:

  • Power output selectable in software
  • Create multipoint networks with individual node addresses
  • Packet radio with ready-to-go Arduino libraries
  • Uses the amateur or license-free ISM band
  • Supports simple wire antenna or spot for μFL or SMA radio connector
  • Integrated 3.3V voltage regulator and levelshifter

Applications:

  • Sensor node networks
  • Transmit data over a campus or town

Package:

  • Breakout board (25.3mm x 29.3mm x 3.5mm)

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
RFM69HCWAdafruit—
RFM69HCW-433S2AdafruitModule

Other RF / Wireless

All RF / Wireless datasheetsAll Adafruit datasheets (6)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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