RF transmitter + receiver wireless 433Mhz
433 MHz RF Transmitter & Receiver Module
Overview:
This low-cost 433 MHz RF pair (one transmitter, one receiver) is perfect for simple wireless communication between microcontrollers, remote sensors, and DIY automation projects. They support digital or ASK/OOK data signals and are commonly used with Arduino, ESP32, Raspberry Pi, and other embedded systems.
Key Features:
Transmitter (TX): 433 MHz ASK/OOK, VCC input 3–12 V
Receiver (RX): Superheterodyne high-sensitivity (~–110 dBm), 3–12 V
Interfaces: Digital data pins for easy wiring (no chip required)
Supports 100 m+ range (with antennas, line-of-sight)
Compact 4-pin modules (VCC, GND, DATA, ANT)
Ideal for simple remote controls, sensor links, wireless switches
Technical Specifications:
| Parameter | Transmitter (TX) | Receiver (RX) |
|---|---|---|
| Frequency | 433.92 MHz | 433 MHz |
| Modulation | ASK / OOK | ASK demodulated output |
| Supply Voltage | 3 V – 12 V | 3 V – 12 V |
| Supply Current | ~10 mA | ~5–6 mA |
| Sensitivity | N/A | –110 dBm typical |
| Data Rate | ~4–10 kbps | Dependent on transmitter |
| Dimensions | ~24×14 mm (standard pin form) | Same as TX |
Wiring (Arduino UNO Example):
TX Module: VCC to 5 V, GND to GND, DATA to D12
RX Module: VCC to 5 V, GND to GND, DATA to D11
Add 17 cm wire antenna for improved range
Transmitter pulls data HIGH to send; receiver outputs HIGH by default, pulses LOW upon signal
Applications:
Wireless "Hello World" data packets between Arduinos
Remote control (lights, relays, door systems)
Wireless sensor data logging (e.g., temperature, humidity)
Simple vehicle alarm systems
Smart home communication links
Resources:
📄 Datasheet Summary:
Slim overview from Components101 with specs and full datasheet link youtube.com+8youtube.com+8youtube.com+8youtube.com🎥 YouTube Video Tutorial:
Arduino Tutorial: 433 MHz Wireless Modules Basic Setup and Example using DHT22 sensor youtube.com+1youtube.com+1youtube.com