The RXN-433MHz RF Receiver Module is a compact and low-power radio frequency receiver that operates at the 433MHz frequency, commonly used for short-range wireless communication in various applications. This module is widely used in remote control systems, telemetry, wireless alarm systems, and various DIY projects. It is designed to receive coded signals from a compatible 433MHz RF transmitter and can be easily interfaced with microcontrollers such as Arduino, Raspberry Pi, and others.
This circuit consists of an Arduino UNO connected to an RXN433MHz radio frequency module. The Arduino provides 5V power and ground to the RF module and is configured to communicate with it via digital pin D11. Additionally, a multimeter is connected with alligator clip cables to measure the voltage supplied to the RF module.
Open Project in Cirkit Designer
This circuit consists of two Arduino UNO microcontrollers, each connected to an RF 433 MHz Transmitter and a 433 MHz RF Receiver Module. The setup allows for wireless communication between the two Arduinos, enabling them to send and receive data over a 433 MHz RF link.
Open Project in Cirkit Designer
This circuit consists of two Arduino Uno R3 microcontrollers communicating wirelessly using 433 MHz RF modules. One Arduino is connected to an RF transmitter to send data, while the other Arduino is connected to an RF receiver to receive data and control an LED based on the received signal.
Open Project in Cirkit Designer
This circuit consists of two Arduino UNOs communicating wirelessly using 433MHz RF modules. One Arduino sends 'yes' or 'no' signals via an RF transmitter, while the other Arduino receives these signals through an RF receiver and controls a MOSFET to switch a 12V power source on or off based on the received signal.
Open Project in Cirkit Designer| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground, connected to the system ground |
| 2 | DATA | Data output, delivers the demodulated data |
| 3 | Vcc | Supply voltage, 3.3V to 5V DC |
| 4 | ANT | Antenna connection, for the 433MHz signal |
Connecting the Module:
Arduino Sketch:
RadioHead or rc-switch library for handling the RF signals.#include <RH_ASK.h>
// Include RadioHead Amplitude Shift Keying Library
RH_ASK rf_receiver;
// Create Amplitude Shift Keying Object
void setup()
{
Serial.begin(9600); // Initialize Serial Monitor
if (!rf_receiver.init())
Serial.println("init failed");
// Initialize ASK Object
}
void loop()
{
uint8_t buf[RH_ASK_MAX_MESSAGE_LEN];
uint8_t buflen = sizeof(buf);
if (rf_receiver.recv(buf, &buflen)) // Check if data received
{
int i;
Serial.print("Message Received: ");
for (i = 0; i < buflen; i++)
{
Serial.print((char)buf[i]);
}
Serial.println();
}
}
Q: Can the RXN-433MHz module be used with a 3.3V system? A: Yes, the module can operate with a supply voltage as low as 3.3V.
Q: What is the maximum range of the module? A: The range depends on many factors, including antenna design, but it can typically reach up to 100 meters in open space.
Q: How can I increase the data rate? A: The data rate is limited by the modulation technique and the quality of the signal. For higher data rates, consider using a different module with FSK modulation or a higher frequency band.
Q: Is it necessary to use an external antenna? A: Yes, an external antenna is required for proper operation. A simple wire with a length of 17cm can serve as an adequate antenna for most applications.