433 MHz RF Receiver Module | Code | Circuit | Pin configuration

433 MHz RF Receiver Module

RF Receiver Module is the wireless communication module, which operates at 433MHz signal and it is the data transmission used for short-distance communication. For wireless communication, we need a Transmitter and receiver module.

Before reading this topic once refer RF-Transmitter Module

In this tutorial, we will discuss the Receiver module :

RF: Radio Frequency

Model number: FS1000A

Other names: 433MHz RF Receiver, RF-Receiver, RF-Rx Module.

Other similar devices: 315 MHz, nrf24L01


Pin configuration


Power supply positive pin


Power supply negative pin


Data received pin




Data received pin

Note: Two DATA pins are the same. You can use any of the pins, or simply you can short the two pins.


  • Modulation Technique: ASK-Amplitude shift keying
  • Circuit model: saw resonator
  • simplex communication
  • serial data receiving.
  • The minimum power supply is required to operate
  • Low cost
  • Without an antenna, we can send data up to 1-meter


Technical Specifications

  • Model Number: FS1000A
  • Operating voltage: receiver: 3-12v
  • Operating frequency: 433.92 MHz
  • Turn ON time: min-10ms, typical-20ms.
  • Data rate: typical-1kbps, max-3kbps.
  • Communication range: 70mts


Where to use 433MHz RF Module

It is a short-range wireless  communication, based on this specification we will use this module where we  need to design a short-range wireless applications such as following:

Example-1 For suppose we want to unlock the car door  remotely so, we can design this application using our smart RF module.

Example-2 Design of remote toy cars using wireless control

Example-3 wireless water level indicator In such applications, if the distance between the alarm indicator and the water tank is very less, then we can go for wired communication but in some buildings it is not possible to make 50mts of wire and arrangement in that applications it is better to implement wireless communication.

How RF Receiver Module Work

It Receives the data over the air(free space) with the data rate of 3kbps speed. It consists of  RF tuned circuit and a couple of op-amps required to amplify the received carrier signal from the transmitter module. The amplified signal further fed to the Phase lock loop which enables the decoder to “lock” on to the digital bits, which gives better-decoded output


 How to use 433Mhz RF Receiver module | Arduino with 433Mhz RF Receiver Module

RF Module receives data through serial transmission i.e bit by bit. You can interface this module directly with any of the electronic switching devices other-wise you can interface with microcontrollers.

Note:  Here I’m giving 5V power supply

Arduino Interface with RF Receiver








Connect to 10cm wire


Circuit diagram



Arduino with RF Receiver Code


Circuit Explanation

In the above circuit, we apply the 5v dc supply using Arduino as shown in the circuit diagram,  According to the circuit when the switch is in closed state at the transmitter side, Receive Module gets LOGIC-0 and when switch is in  open state at the transmitter side, Receiver gets LOGIC-1,

So we can say that when the input switch is closed state RF Transmitter module sends LOGIC-0 to the receiver when the switch is in an open state RFTransmitter sends LOGIC-1 to the receiver part.





  • Remote controls
  • Automation systems
  • Wireless security system
  • Short distance communication (simplex)
  • Industrial wireless security alarm systems


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