433Mhz Wireless Transceiver Kit for Arduino

Description

📡 Description of the Wireless 433 MHz (RX/TX) Transceiver Kit

The wireless 433 MHz RX/TX transceiver kit is a low-cost module designed for wireless data transmission via radio waves. This kit consists of two modules:

• Transmitter Module (TX) 433 MHz
• Receiver Module (RX) 433 MHz

It is commonly used in Arduino projects, home automation, smart home, and generally for short/medium range wireless communication (up to 100 meters in open field).

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⚙️ Technical Specifications

📤 Transmitter Module (TX):

• Operating Frequency: 433 MHz
• Operating Voltage: 3.5V – 12V DC
• Transmission Current: 10-40 mA
• Output Power: up to 10mW
• Transmission Range: 20-100 meters (open field)
• Modulation Type: ASK (Amplitude Shift Keying)

📥 Receiver Module (RX):

• Operating Frequency: 433 MHz
• Operating Voltage: 5V DC
• Reception Current: < 5.5 mA
• Sensitivity: -105 dB
• Modulation Type: ASK

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🛠️ Connection with Arduino

📡 TX Connection (Transmitter):

TX Pin	Arduino
VCC	5V (or 3.3V if specified)
GND	GND
DATA	Digital Pin (e.g., D12)

📡 RX Connection (Receiver):

RX Pin	Arduino
VCC	5V
GND	GND
DATA	Digital Pin (e.g., D11 or D2)

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💾 Required Library: VirtualWire (obsolete) or RadioHead

For new projects it is recommended RadioHead, but many tutorials still use VirtualWire.

🔧 Library Installation VirtualWire

1. Go to Sketch > Include Library > Manage Libraries
2. Search for VirtualWire and install it.

Or:
Download from https://github.com/PaulStoffregen/VirtualWire and put it in the folder libraries.

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🧪 Example Usage with Arduino

📤 Transmitter Code (TX)

#include <VirtualWire.h>

void setup() {
 vw_set_tx_pin(12); // pin dati TX
 vw_setup(2000); // Velocità di trasmissione: 2000 bps
}

void loop() {
 const char *msg = "Ciao da TX!";
 vw_send((uint8_t *)msg, strlen(msg));
 vw_wait_tx(); // Attende che la trasmissione sia completata
 delay(1000);
}

📥 Receiver Code (RX)

#include <VirtualWire.h>

void setup() {
 Serial.begin(9600);
 vw_set_rx_pin(11); // pin dati RX
 vw_setup(2000); // Velocità di ricezione: 2000 bps
 vw_rx_start(); // Avvia il ricevitore
}

void loop() {
 uint8_t buf[VW_MAX_MESSAGE_LEN];
 uint8_t buflen = VW_MAX_MESSAGE_LEN;

 if (vw_get_message(buf, &buflen)) {
 Serial.print("Messaggio ricevuto: ");
 for (int i = 0; i < buflen; i++) {
 Serial.print((char)buf[i]);
 }
 Serial.println();
 }
}

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🧠 Useful Tips

• Use antennas (e.g., wire approximately 17 cm long for 433 MHz) to improve range.
• Avoid interference: do not place TX and RX too close together.
• Power TX separately if using voltages higher than 5V (e.g., 9V).
• Not suitable for large data volumes (ideal for sending short commands/texts).

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🛠️ Typical Applications

• Wireless Remote Controls
• Remote Sensors (temperature, humidity, etc.)
• Remote Relay/Light Control
• Wireless Alarms

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GENERAL
MATERIALS	pcb + copper + components
COMPATIBILITY	ARDUINO
WEIGHT AND DIMENSIONS	PRODUCT WEIGHT	8g
PACKAGE WEIGHT	0,15 kg
PRODUCT DIMENSIONS (L x W x H)	1,5 x 3 x 0,3 cm + 2,5 x 2 x 0,3 cm
PACKAGE DIMENSIONS (L x W x H)	5 x 10 x 2 cm
PACKAGE CONTENT	PACKAGE CONTENT	2 Modules 1 x Module

We have available the technical sheet of all components, if it is not present in the product download card, send us a message from the contact us form and we will publish it as soon as possible on our website.

Tutorial: How to use Kit RX TX 433MHz (Arduino Wireless)

Wireless data transmission kit for Arduino. For beginners and intermediate users.

What you need

• Arduino Uno
• 433MHz Transceiver Kit
• USB cable
• Battery

Steps

1. Connect the RX module to digital pin 2 on Arduino.
2. Connect the TX module to digital pin 3 on Arduino.
3. Install the VirtualWire library following the official website instructions.
4. Configure the modules in transmission and reception mode, check the datasheet.
5. Write the code to send data from the TX module to the RX module.
6. Verify that the data is received correctly on the Arduino serial interface.

Example code

include <VirtualWire.h>
void setup() {
 vw_setup(2000);
}

void loop() {
 vw_send((uint8_t *)