433MHz RF Wireless Transmitter and Receiver Module Pair

FS1000A-style 433MHz ASK transmitter and receiver pair for low-cost one-way wireless remote control and simple data links.

₹75 + 18% GST

SKU: BOTBIT-IOT-11 · Best for: Simple one-way wireless remote controls and switches

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Overview

About 433MHz RF Wireless Transmitter and Receiver Module Pair.

This is the classic 433MHz RF transmitter and receiver pair, usually an FS1000A transmitter and an XY-MK-5V (or similar super-regenerative) receiver. They provide a very cheap, one-way ASK/OOK wireless link at 433MHz, ideal for simple remote control and low-rate data where you do not need the sophistication of LoRa or WiFi.

They are wildly popular for beginner and budget projects because a pair costs almost nothing and works with any microcontroller's digital pins. You feed serial data into the transmitter's DATA pin and read it back on the receiver, typically using a library that handles encoding, so you can send button presses or short messages across a room or a garden.

Expect modest, environment-dependent range and one-way, half-duplex operation with no built-in error correction. Soldering a simple 17.3cm wire antenna to each board dramatically improves range, and using a proper encoding library (with checksums) makes the link far more reliable than raw bit-banging.

Key features

Why it stands out.

433MHz ASK/OOK transmitter (FS1000A) and receiver pair

Extremely low cost, one-way wireless link for remote control and data

Simple DATA-pin interface works with any MCU digital output/input

Transmitter runs from 3-12V; higher VCC gives more range

Works with common libraries (RadioHead, VirtualWire, RC-Switch)

Solder-on wire antenna pads to extend range

Specifications

Selection facts.

Frequency	433.92 MHz (ISM band)
Modulation	ASK / OOK
Transmitter	FS1000A (3 pins: VCC, DATA, GND)
Receiver	Super-regenerative (e.g. XY-MK-5V, 4 pins)
TX supply voltage	3-12 V DC
RX supply voltage	5 V DC
Data rate	Up to ~10 kbps (ASK, practical much lower)
Range	~20-100 m depending on voltage/antenna/environment
Recommended antenna	~17.3 cm quarter-wave wire per board

Applications

Where it is used.

Simple one-way wireless remote controls and switches
Low-cost sensor data links across a room or garden
DIY home automation triggers and doorbells
Wireless notification/alert buttons
Learning RF and packet encoding basics
Cloning/experimenting with 433MHz remotes using RC-Switch

Buying guide

How to choose.

Buy this pair when you need a dirt-cheap, one-way wireless trigger or short-message link and range/reliability are not critical. If you need two-way communication, longer range, or robust data, step up to an nRF24L01 (2.4GHz) or an SX1278 LoRa module instead.

For best results, power the FS1000A transmitter at a higher voltage (up to 12V) than the logic, since range scales with TX voltage, and solder a ~17.3cm wire antenna to both the transmitter and receiver. The receiver is typically 5V; keep the DATA lines at levels your MCU can read.

Pair it with a library that adds encoding and error checking: RadioHead (RH_ASK) or the older VirtualWire for arbitrary data, or RC-Switch when working with 433MHz remotes and mains-socket controllers. Always buy transmitter and receiver together as a matched pair.

FAQ

Common questions.

What range can I actually get?

Bare boards without antennas manage only a few metres. With a 17.3cm quarter-wave wire antenna on each board and the transmitter run at a higher voltage, you can reach tens of metres, sometimes ~100m in the open. Walls and interference reduce this significantly.

Do I need a library, or can I send raw data?

You can bit-bang, but it is unreliable. Use RadioHead's RH_ASK (or legacy VirtualWire) for general data with built-in encoding and checksums, or RC-Switch for controlling/decoding 433MHz remote sockets and remotes.

Is communication two-way?

No. This is a one-way (simplex) link: the FS1000A only transmits and the receiver only receives. For bidirectional communication you would need a pair in each direction or a true transceiver like nRF24L01 or LoRa.

What voltage should I use?

The receiver is typically 5V. The transmitter works from 3-12V, and running it at a higher voltage (e.g. 12V) noticeably increases range. Make sure the DATA signal levels are compatible with your microcontroller.

Why is my link picking up noise or false data?

Super-regenerative receivers output noise when no signal is present, which is why an encoding library with checksums is essential. Adding antennas, keeping the boards apart from noisy electronics, and a stable supply all help.

What is in the box?

One 433MHz transmitter (FS1000A) and one matching receiver module. Antenna wires are usually not attached, so solder your own ~17.3cm wire to each for usable range.