HC-11 433MHz wireless RF serial UART Module CC1101 [Replacement to HC-12]

Description

Description

The HC-11 433MHz Wireless RF Serial UART Module is a low-cost, high-performance FSK (Frequency Shift Keying) transceiver module designed for transparent wireless serial communication. Built around the popular CC1101 RF chip, this module is an excellent replacement for Bluetooth modules in many applications, offering longer range and more robust performance in challenging environments .

Unlike simple ASK (Amplitude Shift Keying) modules, the HC-11 uses FSK modulation, which provides superior noise immunity and more reliable data transmission . The module operates as a complete wireless serial link – data sent into the UART port of one module is automatically transmitted wirelessly and appears at the UART port of any other HC-11 module on the same channel. No additional RF programming or protocol handling is required by your microcontroller .

The HC-11 features a built-in MCU that handles all RF protocol processing internally. This means you simply connect the module to your microcontroller’s UART pins (TX and RX), and it functions just like a wired serial connection – but without the wires. The module supports a wide range of UART baud rates from 1200 bps to 115200 bps, making it compatible with virtually any microcontroller .

Multiple Operating Modes: The HC-11 offers four UART transparent transmission modes (FU1-FU4), allowing you to optimize for power consumption or speed:

Configuration Flexibility: All module parameters are configurable via simple AT commands, including communication channel (001-127), UART baud rate, transmit power (8 levels), and operating mode. Settings are stored in non-volatile memory and retained after power loss .

Important Note: The HC-11 is not compatible with the HC-12 module . These two modules operate on different protocols and cannot communicate with each other. For best results, use HC-11 modules in pairs or multiples.

Whether you need to create a wireless sensor network, replace a wired serial connection between two microcontrollers, add remote control to a project, or build a wireless data logging system, the HC-11 provides a simple, reliable, and affordable wireless serial solution.

Key Features

• 433MHz FSK Transceiver – Built on CC1101 chip, provides reliable, noise-immune wireless communication

• Transparent Serial Communication – No RF programming needed; data in = data out wirelessly

• Multiple Operating Modes – Four modes (FU1-FU4) with idle currents of 80µA, 3.5mA, or 22mA for power optimization

• Wide Baud Rate Support – UART speeds from 1200 bps to 115200 bps (default 9600 bps)

• AT Command Configuration – Set channel, baud rate, power level, and mode via simple text commands

• Adjustable Transmit Power – 8 power levels from -30dBm to +10dBm (10mW max)

• Wide Voltage Range – Operates from 3.3V to 5V DC, compatible with both 3.3V and 5V microcontrollers

• Multiple Channels – 20+ selectable channels (001-127) with 400KHz step spacing

• Compact Form Factor – 27.8mm × 14.4mm × 4mm with 2.54mm pin headers

• Wide Temperature Range – -40°C to +85°C for industrial applications

Technical Parameters