RFM69HCW-900S2
Radio Transceiver BreakoutThe 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
AdafruitCategory
RF / WirelessRFM69HCW-900S2 Key Specifications
| Parameter | Value |
|---|---|
| Range | ~500 m line of sight (up to ~5 km with directional antennas) |
| Chipset | SX1231 |
| Frequency | 433 MHz (this breakout); 900 MHz variant sold separately |
| Interface | SPI |
| Encryption | AES-128 |
| Modulation | FSK |
| Output Power | +13 dBm to +20 dBm (up to 100 mW), software selectable |
| Transmit Current | 50 mA (+13 dBm) to 150 mA (+20 dBm) |
| Breakout Dimensions | 25.3mm x 29.3mm x 3.5mm |
| Receive/Listen Current | ~30 mA |
| Breakout Power/Logic Input | up 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 Number | Manufacturer | Package |
|---|---|---|
| RFM69HCW | Adafruit | — |
| RFM69HCW-433S2 | Adafruit | Module |
Other RF / Wireless
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- ESP32-S3 – Espressif Systems, Wireless SoC
- SMTSO2515CTJ – Sinhoo, Surface Mount Nut
- ESP32-WROOM-32 – Espressif Systems, Wi-Fi+BT+BLE MCU module
Ask your AI agent about the RFM69HCW-900S2
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the RFM69HCW-900S2 run from my 12 V rail? Check it against the datasheet limits."
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