The RF 433MHz Transmitter/Receiver Module is a compact, cost-effective, and reliable wireless communication solution designed for Arduino, Raspberry Pi, and other microcontroller platforms. It enables seamless serial data transmission between two systems without physical wiring, making it ideal for IoT, home automation, remote control, and sensor monitoring projects. Operating at a frequency of 433 MHz, this RF module offers an excellent balance between range, stability, and power efficiency.
Key Features
- Wide Operating Voltage Range – Works efficiently with 3V–12V, supporting multiple microcontroller power levels.
- Long Communication Range – Up to 100–200 metres in open space (line-of-sight), depending on antenna and environment.
- Low Power Consumption – Optimised design for battery-powered and energy-conscious applications.
- Simple Serial Interface – Transmits and receives digital data using standard microcontroller GPIO pins.
- Stable Frequency Operation – Operates at 433 MHz, providing a stable and interference-resistant communication channel.
- Compact and Lightweight – Fits easily on breadboards and PCB layouts for compact designs.
- Compatible with Arduino and Raspberry Pi – Easily integrates with popular development boards and IoT systems.
Technical Specifications
| Parameter | Transmitter Module | Receiver Module |
|---|---|---|
| Operating Voltage | 3V – 12V DC | 5V DC |
| Operating Frequency | 433 MHz | 433 MHz |
| Transmitting Power | 10 mW | — |
| Modulation Type | ASK / OOK (Amplitude Shift Keying / On-Off Keying) | ASK / OOK |
| Transmission Distance | Up to 100–200 m (open area) | — |
| Data Rate | Up to 10 Kbps | — |
| Receiver Sensitivity | — | –105 dB |
| Antenna | External wire antenna (17 cm recommended) | External wire antenna (17 cm recommended) |
| Dimensions (approx.) | 19 mm × 19 mm × 8 mm | 30 mm × 14 mm × 7 mm |
Applications
The RF 433MHz Transmitter/Receiver Module is widely used across multiple wireless communication projects due to its simplicity and reliability. Below are common use cases:
- Wireless Data Transmission – Transmit sensor data, serial messages, or telemetry between embedded systems.
- Remote Control Systems – Ideal for remote-controlled cars, doors, lights, and appliances.
- Home Automation – Build smart home systems such as wireless switches, alarms, and doorbells.
- IoT and Telemetry Projects – Send sensor readings or control signals wirelessly over medium distances.
- Security Systems – Integrate into wireless burglar alarms, access systems, and motion detection modules.
- Educational and Prototype Projects – Commonly used in embedded system courses and hobby projects for learning wireless communication.
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