HC-11 433MHz RF Transceiver Module Overview
The HC-11 433MHz RF transceiver module provides reliable, low-power wireless serial communication for embedded systems, IoT projects, and remote monitoring applications. Designed to extend communication range up to 1000 meters in open space, the HC-11 is a cost-effective choice for projects that need stable, UART-based wireless links without relying on Wi-Fi or cellular networks.
What is the HC-11 433MHz Module?
The HC-11 is a compact serial RF transceiver that operates on the 433 MHz ISM band. It uses a UART TTL interface for simple integration with microcontrollers and supports multiple transmission modes to balance speed, range, and power consumption. The module is suitable for both hobbyist prototypes and industrial deployments.
Key features
- 433 MHz ISM band operation optimized for long-range links
- Transmission range up to 1000 meters line of sight
- UART TTL serial interface, 1200 to 115200 bps
- Multiple operating modes: FU1, FU2, FU3, and Normal for tuning performance
- Wide supply voltage range: 3.2 V to 5.5 V for flexible power options
- PCB or external antenna support for extended coverage
- Compact module size for easy integration (27 mm x 13.5 mm)
- Compatible with Arduino, STM32, PIC and other microcontrollers
Technical specifications
- Frequency: 433 MHz
- Transmission Range: Up to 1000 meters (line of sight)
- Power Supply Voltage: 3.2 V to 5.5 V
- Interface: UART TTL
- Baud Rate: 1200 to 115200 bps
- Operating Modes: FU1, FU2, FU3, Normal
- Antenna: PCB or external antenna
- Module Dimensions: 27 mm x 13.5 mm
Typical applications
- Remote control systems and wireless relays
- Sensor nodes and remote data logging
- Smart agriculture automation such as irrigation control
- Home automation and environmental sensing networks
- Industrial equipment monitoring and telemetry
- Educational projects, prototyping and robotics
How to connect and use the HC-11 with microcontrollers
Getting started with the HC-11 is straightforward. Use the UART interface to transmit and receive data from your microcontroller. Basic connection steps:
- Power the module with a stable supply between 3.2 V and 5.5 V.
- Connect the module TX to the microcontroller RX and module RX to the microcontroller TX. Ensure a common ground between devices.
- Set the serial baud rate between 1200 and 115200 bps to match your controller settings.
- Use the module operating modes (FU1, FU2, FU3, Normal) to optimize for range or throughput based on your application needs.
Many users configure settings via serial commands in setup mode or by using a configuration pin if available on the breakout. Always consult wiring diagrams and verify voltages before powering the module.
Performance and comparisons
The HC-11 delivers an excellent balance of range, power efficiency and simplicity. Compared to other 433 MHz transceivers, it is easier to integrate because of the UART TTL interface while still offering strong line-of-sight range for remote control and telemetry. For ultra-long-distance links or advanced features you may consider other modules, but the HC-11 is ideal for moderate to long-range deployments that require reliable and low-cost wireless communication.
Benefits for developers and system integrators
- Stable signal strength across large distances without cellular or Wi-Fi dependency
- Flexible operating modes for performance tuning and interference management
- Low power consumption suitable for battery-powered sensor nodes
- Easy integration with common microcontroller platforms such as Arduino and STM32
- Durable and cost-effective solution for long-term projects and production systems
Availability and ordering
The HC-11 433MHz module is available at Colgroad, a trusted supplier of electronic components in Pakistan. Order online for delivery across Islamabad and the rest of Pakistan, or contact support for bulk purchase options and technical assistance.
Note
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