Adafruit
Adafruit RFM69HCW Transceiver Radio Breakout - 433 MHz
The Adafruit RFM69HCW Transceiver Radio Breakout @ 433 MHz is a breadboard-friendly packet radio module for adding long-range wireless communication to Ardui...
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The Adafruit RFM69HCW Transceiver Radio Breakout @ 433 MHz is a breadboard-friendly packet radio module for adding long-range wireless communication to Arduino and other microcontroller projects. Based on the SX1231 transceiver, it provides FSK packet radio with AES-128 encryption, auto-retransmit, and multipoint networking at 433 MHz.
The breakout includes a 3.3 V regulator and level shifter, so it works with both 3 V and 5 V logic. With +13 to +20 dBm transmit power (up to 100 mW), it can reach approximately 500 m line of sight with a simple wire antenna — up to 5 km with directional antennas and optimised settings.
Key Features
- SX1231 FSK Packet Radio – RFM69HCW at 433 MHz with SPI interface
- +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
- 3.3 V Regulator & Level Shifter – Works with 3 V or 5 V logic and power
- Arduino Libraries – Ready-to-go with tested support
- uFL Antenna Connector – Or solder a simple wire antenna
- 50–150 mA TX Current – ~30 mA during active listening
Ideal For
- Wireless sensor networks with Arduino
- Remote control and telemetry
- Campus or farm-wide data links
- Encrypted point-to-point or multipoint communication
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- 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.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- 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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