433MHz RF Transmitter and Receiver Module Link Kit
Wireless Communication Module for Arduino and MCU Projects
This 433MHz RF module kit provides a simple wireless data link for Arduino and microcontroller projects, enabling remote control and sensor data transmission over short distances.
LicenseFree 433MHz Band Operates without special frequency approval
Simple Interface - Direct connection to MCU pins
Transmitter voltage: 3.5V to 12V (higher voltage increases range)
Receiver voltage: 5V DC only
Use RCSwitch library for easy data encoding and decoding
AM modulation modules are suitable for simple ON/OFF signals, not high-speed data streaming
Technical Specifications
| Parameter | Transmitter | Receiver |
|---|
| Frequency | 433.92MHz | 433.92MHz [citation:1] |
| Modulation | ASK / OOK | ASK / OOK [citation:1][citation:5] |
| Transmission Range | 20-200 meters [citation:1] | Up to 200 meters [citation:11] |
| Operating Voltage | 3.5V to 12V | 5V [citation:1] |
| Transmission Power | 10mW | N/A [citation:1] |
= Key Features =
Easy Integration - Simple DATA, VCC, GND connection [citation:6]
OneWay Communication Transmitter sends, receiver listens [citation:1]
Low Cost - Affordable wireless solution for prototyping
Wide Voltage Range Transmitter accepts 3.5V12V for flexible power [citation:1]
= Applications =
- Remote control switches and sockets [citation:11]
- Wireless sensor data transmission
- Home automation projects
- Garage door and gate remote control [citation:2]
- Robot wireless control
- Security and alarm systems
Versatile Kit - Works with Arduino, Raspberry Pi, and most MCUs
Easy to Use - Simple wiring with common libraries [citation:6]
√ Includes both transmitter and receiver modules
√ Ideal for short-range wireless projects
√ Breadboard-friendly design [citation:1]
Connection Guide
Transmitter (TX) wiring:
- VCC → 5V or up to 12V for extended range
- GND → Ground
- DATA → Arduino digital pin [citation:6]
Receiver (RX) wiring:
- VCC → 5V only
- GND → Ground
- DATA → Arduino digital pin (interrupt-capable recommended)
Add a 17.3cm quarter-wave antenna for best range at 433MHz [citation:6]
Use a straight wire as antenna for improved performance [citation:11]
Do not exceed 12V on the transmitter [citation:1]
Receiver is 5V only - using higher voltage may damage it
Troubleshooting
No signal received:
- Check power supply voltage for both modules
- Verify DATA connections
- Try different baud rate or protocol
- Ensure antenna is attached
Short range:
- Add a 17.3cm antenna wire to transmitter
- Check for interference from metal objects
- Use higher voltage on transmitter (9V-12V)
