Adafruit
Adafruit Radio FeatherWing - RFM69HCW 433MHz
The Adafruit Radio FeatherWing RFM69HCW @ 433 MHz adds short-to-medium range packet radio to any Feather board. Based on the SX1231 transceiver, this Feather...
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The Adafruit Radio FeatherWing RFM69HCW @ 433 MHz adds short-to-medium range packet radio to any Feather board. Based on the SX1231 transceiver, this FeatherWing provides FSK packet radio with built-in AES-128 encryption, auto-retransmit, and multipoint networking — ideal for sensor networks, remote control, and wireless data links.
With +13 to +20 dBm transmit power (up to 100 mW), the RFM69HCW can reach approximately 500 m line of sight with a simple wire antenna, and potentially up to 5 km with directional antennas and optimised settings. Pair it with a Wi-Fi, cellular, or Bluetooth Feather to bridge 433 MHz radio to the internet.
Key Features
- SX1231 FSK Packet Radio – FSK/GFSK/MSK/GMSK/OOK modulation at 433 MHz
- +13 to +20 dBm Transmit Power – Up to 100 mW, selectable in software
- ~500 m Range – Line of sight with wire antenna; up to 5 km with directional antennas
- AES-128 Encryption – Built-in hardware encryption engine
- Auto-Retransmit – Automatic packet retransmission for reliability
- Multipoint Networking – Individual node addresses for creating networks
- SPI Interface – Connects to Feather via SPI bus
- 50–150 mA TX Current – 50 mA at +13 dBm, 150 mA at +20 dBm
- Arduino Libraries – Ready-to-go with tested support
Ideal For
- Wireless sensor networks
- Remote control and telemetry
- Bridging 433 MHz radio to internet via Wi-Fi/cellular Feathers
- Encrypted point-to-point or multipoint data links
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- FeatherWing
- A FeatherWing is an add-on board made to plug into the Feather microcontroller board layout. Knowing a product is a FeatherWing helps you check whether it will physically and electrically fit your Feather-style mainboard.
- Headers
- Rows of connector contacts on a fixed pitch (commonly 2.54 mm) used to link a board to a breadboard, jumper wires, or another board. They come as male pin headers and female socket headers; when a module ships with pre-soldered headers it can be used straight away, whereas bare pads require soldering the pins yourself.
- SMA
- SMA is a small threaded coaxial (RF) connector widely used to attach antennas and other radio-frequency cables. A device with SMA antenna ports needs antennas or pigtails with matching SMA connectors, or a suitable adapter, to connect to them.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- TX
- TX means transmit, usually showing data being sent from the board. A TX indicator LED can help you see when the board is communicating or uploading code.
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