HM-11 Bluetooth 4.0 BLE Module Based on CC2541

HM-11 Bluetooth 4.0 BLE Module Based on CC2541
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  • Product Code:SQ8653
  • Availability: 1000
  • $2.16
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Tags: HM-11, Bluetooth module, BLE 4.0, CC2541, serial Bluetooth, low energy,

The HM-11 UART module is a compact Bluetooth Low Energy module built around the Texas Instruments CC2541 system-on-chip. It implements the Bluetooth Specification V4.0 BLE protocol and provides a simple UART serial interface for wireless data transmission. The module integrates a PCB antenna on board, eliminating the need for external RF design work. With its small footprint and low power consumption, the HM-11 is suitable for short-range wireless communication in IoT and embedded systems. The module supports both master and slave roles, which can be configured through AT commands. Users can modify the baud rate, device name, pairing password, and transmit power level via the standard AT command set. The HM-11 supports communication with iOS and Android devices, and in open environments, reliable communication can be achieved within approximately 30 meters. Its UART interface operates at 3.3V TTL logic level, making it straightforward to interface with common microcontrollers and development boards.

HM-11 UART module Application

  1. Smart home automation
  2. Wireless sensor networks and data logging
  3. IoT prototyping
  4. Bluetooth car hands-free systems
  5. Wireless keyboard and mouse
  6. Medical equipment
  7. Computer wireless accessories
  8. Bluetooth headsets
  9. Short-range wireless data transmission between embedded devices

HM-11 UART module Specifications

  1. Bluetooth protocol: Bluetooth Specification V4.0 BLE
  2. Chipset: Texas Instruments CC2541
  3. Working frequency: 2.4 GHz ISM band
  4. Modulation: GFSK (Gaussian Frequency Shift Keying)
  5. Interface: UART (3.3V TTL)
  6. Supply voltage: 3.3V DC
  7. Operating current: 50 mA (maximum)
  8. Sensitivity: ≤ -84 dBm at 0.1% BER
  9. RF power: -23 dBm, -6 dBm, 0 dBm, 6 dBm (configurable via AT command)
  10. Data rate: Asynchronous 6 Kbps, Synchronous 6 Kbps
  11. Sleep current: 400 µA to 1.5 mA
  12. Transmission current: 20 mA
  13. Operating temperature: -5°C to +65°C
  14. Dimensions: 18 mm × 13 mm × 2.2 mm
  15. Supports master and slave roles
  16. AT command set for parameter configuration

Features

  1. Bluetooth Specification V4.0 BLE compliant
  2. Based on Texas Instruments CC2541 chip
  3. Compact size with on-board PCB antenna
  4. Ultra-low power consumption
  5. UART serial interface for easy integration
  6. Supports both master and slave roles
  7. Configurable via standard AT commands
  8. Adjustable RF power levels
  9. Supports communication with iOS and Android devices
  10. No byte limit on send and receive data
  11. XBee-compatible form factor
  12. Authentication and encryption support
Interfaces
Interface Type Serial (TTL)
Wireless Parameters
Data Rate 115200bps (defult)
Frequency 2.4 GHz ISM band
RX Mode Current 8.5mA
TX Mode Current 15mA
Electrical Parameters
Input Voltage 3.3V
Physical Parameters
Size 18.7mm x 13.5mm x 2.3mm
Environmental Conditions and Safety
Operating Temprature -40°C ~ +65°C

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