Overview
The 433 MHz RF Transmitter & Receiver Module allows wireless communication between microcontrollers like Arduino, ESP8266, ESP32, or STM32. It’s widely used in remote controls, wireless sensors, smart home systems, and STEM lab experiments. This module is easy to use, low-cost, and works with standard ASK/OOK modulation.
Key Features
Frequency: 433 MHz (ISM band)
Power Supply: 5 V (transmitter & receiver)
Communication Range: 50–100 meters line-of-sight (can be longer with external antenna)
Data Rate: Up to 10 kbps (typical for ASK/OOK)
Module Type: Low-cost, easy-to-use, suitable for DIY projects
Compatible with Arduino, NodeMCU ESP8266, ESP32, Raspberry Pi, STM32
Technical Specifications
Transmitter
| Parameter | Specification |
|---|---|
| Operating Voltage | 3–12 V (5 V recommended) |
| Current Consumption | ~10–15 mA |
| Frequency | 433 MHz |
| Output Power | ~10 mW (low power) |
| Data Input | Digital input from microcontroller |
| Modulation | ASK/OOK |
Receiver
| Parameter | Specification |
|---|---|
| Operating Voltage | 5 V |
| Current Consumption | ~3–5 mA |
| Frequency | 433 MHz |
| Sensitivity | -90 dBm (typical) |
| Output | Digital data output |
| Modulation | ASK/OOK |
| Antenna | Wire antenna or external antenna supported |
Pinout
Transmitter Module
| Pin | Function |
|---|---|
| VCC | 3–12 V power supply |
| GND | Ground |
| DATA | Digital data input from microcontroller |
| ANT | Antenna (wire or external) |
Receiver Module
| Pin | Function |
|---|---|
| VCC | 5 V power supply |
| GND | Ground |
| DATA | Digital data output to microcontroller |
| ANT | Antenna (wire or external) |
Applications
Remote control for devices (lights, fans, garage doors)
Wireless sensor networks
Home automation projects
STEM lab experiments for learning wireless communication
IoT prototypes requiring low-cost, short-range wireless links
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