433MHz CC1101 Wireless RF Transceiver Module (Copper Spring Antenna)
Compact, Low-Power Sub-1 GHz RF Communication for Space-Constrained DIY Projects
The 433MHz CC1101 Wireless RF Transceiver Module is a compact, ultra-low-power sub-GHz communication module built on the Texas Instruments CC1101 chipset. Featuring a soldered helical copper spring antenna, this compact board is designed for space-constrained IoT projects, portable transmitters, and short-to-medium-range wireless networks where a bulky external antenna isn't suitable.
It delivers reliable 433MHz data transmission with strong wall penetration while keeping the overall hardware footprint minimal.
Key Features
Ultra-Compact Design: Integrated copper coil spring antenna saves enclosure space while delivering consistent sub-GHz signal coverage.
Full-Duplex Capability: Functions as both a transmitter and receiver (half-duplex operating modes) on sub-1 GHz bands.
Efficient Power Consumption: Features low-power sleep modes and rapid wake-up times, perfect for battery-operated sensor nodes.
SPI Bus Compatibility: Connects directly via standard 4-wire SPI to Arduino, ESP32, STM32, and Raspberry Pi boards.
Multi-Format Modulation: Flexible support for 2-FSK, 4-FSK, GFSK, MSK, and OOK/ASK protocols.
Local Frequency Compatibility: Operates natively on the ICASA-approved 433.92 MHz ISM band used throughout South Africa for remote access.
Ideal Uses
Compact Remote Controls: DIY handheld transmitters, gate/garage door remotes, and wireless keyfobs.
Indoor Sensor Networks: Room-to-room temperature, humidity, or security sensor monitoring.
Embedded IoT Nodes: Enclosed smart devices where space constraints prevent using an external SMA whip antenna.
Wearable Electronics: Low-profile, battery-powered tracking or signaling projects.
Technical Specifications
| Parameter | Specification |
| RF Chipset | Texas Instruments CC1101 |
| Frequency Range | Configurable sub-1GHz (Default tuned for 433 MHz) |
| Communication Interface | SPI (Serial Peripheral Interface) |
| Operating Voltage | 1.8V – 3.6V DC (3.3V logic level strictly required) |
| Max Output Power | +10 dBm |
| Transmission Range | ~20m – 50m (Depends on environment and obstructions) |
| Antenna Type | Soldered Copper Helical Coil Spring Antenna |
| Data Rate | 0.6 kbps to 500 kbps |
Pinout & Connection Guide
Important: The CC1101 works on 3.3V logic levels. Always use a logic level converter or resistor voltage divider when connecting to a 5V board like the Arduino Uno.
| Pin Name | Description |
| VCC | Power Input (1.8V to 3.6V Max—connect to 3.3V pin) |
| GND | Power Ground (0V) |
| CSN | SPI Chip Select (Active Low) |
| SCK | SPI Serial Clock |
| MOSI | SPI Master Out Slave In |
| MISO | SPI Master In Slave Out |
| GDO0 | General Digital Output 0 (Interrupt / Sync Output) |
| GDO2 | General Digital Output 2 (Data Readout) |
Package Includes
1 × CC1101 433MHz Wireless Transceiver Module
1 × Soldered Copper Helical Coil Antenna