How to Use RF Link Receiver - 4800bps (434MHz): Examples, Pinouts, and Specs

The RF Link Receiver - 4800bps (434MHz), manufactured by WENSHING (Part ID: RF_RX_434), is a compact and efficient radio frequency receiver module. It is designed to receive data signals at a baud rate of 4800 bps and operates at a frequency of 434 MHz. This module is widely used in wireless communication systems for applications such as remote controls, data transmission, and IoT devices.

• Wireless remote controls (e.g., garage doors, home automation)
• IoT devices and sensor networks
• Wireless data transmission between microcontrollers
• Robotics and automation systems
• Security systems and alarms

The following table outlines the key technical details of the RF Link Receiver:

The RF Link Receiver module has 4 pins, as described in the table below:

1. Power Supply: Connect the VCC pin to a regulated 5V DC power source and the GND pin to the ground.
2. Antenna: Attach a 17cm wire or a 434 MHz antenna to the ANT pin for better signal reception.
3. Data Output: Connect the DATA pin to the input pin of a microcontroller (e.g., Arduino) or a decoder IC to process the received signal.
4. Pairing with a Transmitter: Ensure the RF transmitter module operates at the same frequency (434 MHz) and baud rate (4800 bps) for proper communication.

• Antenna Placement: For optimal performance, place the antenna in an open area, away from metal objects or interference sources.
• Power Supply: Use a stable and noise-free 5V power supply to avoid signal distortion.
• Decoding Data: The received signal may need to be decoded using a microcontroller or a dedicated decoder IC, depending on the application.
• Range: The effective range of the module depends on environmental factors, such as obstacles and interference. Ensure a clear line of sight for maximum range.

Below is an example of how to connect the RF Link Receiver to an Arduino UNO and read the received data:

• VCC: Connect to the Arduino's 5V pin.
• GND: Connect to the Arduino's GND pin.
• DATA: Connect to Arduino digital pin 2.
• ANT: Attach a 17cm wire to the ANT pin.

// Example code to read data from the RF Link Receiver (RF_RX_434)
// Connect the DATA pin of the receiver to Arduino digital pin 2

#define RECEIVER_PIN 2  // Define the pin connected to the DATA pin of the receiver

void setup() {
  Serial.begin(9600);  // Initialize serial communication at 9600 bps
  pinMode(RECEIVER_PIN, INPUT);  // Set the receiver pin as input
  Serial.println("RF Receiver Ready");
}

void loop() {
  int receivedData = digitalRead(RECEIVER_PIN);  // Read the data from the receiver
  Serial.print("Received Data: ");
  Serial.println(receivedData);  // Print the received data to the Serial Monitor
  delay(100);  // Small delay to avoid flooding the Serial Monitor
}

Note: The received data may need further processing or decoding, depending on the transmitter's encoding scheme.

1. No Data Received

   • Cause: Incorrect wiring or power supply issues.
   • Solution: Double-check all connections and ensure the module is powered with a stable 5V supply.

2. Poor Signal Reception

   • Cause: Antenna not properly connected or interference from nearby devices.
   • Solution: Attach a 17cm wire to the ANT pin and ensure the module is placed away from interference sources.

3. Data Corruption

   • Cause: Mismatched baud rate or noisy power supply.
   • Solution: Verify that the transmitter and receiver are operating at the same baud rate (4800 bps). Use a clean and regulated power supply.

4. Short Range

   • Cause: Obstacles or improper antenna placement.
   • Solution: Ensure a clear line of sight between the transmitter and receiver. Use a proper 434 MHz antenna for better range.

Q1: Can I use this module with a 3.3V microcontroller?
A1: The RF Link Receiver requires a 5V power supply. However, the DATA pin output can be connected to a 3.3V microcontroller if the logic level is compatible.

Q2: What is the maximum range of this module?
A2: The range depends on environmental factors but typically varies between 50-100 meters in open areas.

Q3: Can I use multiple receivers with a single transmitter?
A3: Yes, multiple receivers can be used with a single transmitter, provided they operate at the same frequency and baud rate.

Q4: Do I need an external decoder IC?
A4: It depends on your application. For simple data transmission, a microcontroller can process the received signal. For more complex protocols, a dedicated decoder IC may be required.