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Bluetooth Low Energy Module HM11- CC2541
The HM-11 is a Bluetooth Low Energy (BLE 4.0) module based on the TI CC2541 microprocessor. It provides wireless communication with smartphones, tablets, des...
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The HM-11 is a Bluetooth Low Energy (BLE 4.0) module based on the TI CC2541 microprocessor. It provides wireless communication with smartphones, tablets, desktop computers, and other embedded systems via a simple UART serial interface with AT command control. The XBee-compatible form factor makes it easy to integrate into existing designs.
Configurable as master or slave, with adjustable baud rate, device name, pairing password, and transmit power levels. Effective range is up to 30 metres in open environments.
Key Features
- Bluetooth 4.0 BLE – Low-power wireless communication
- CC2541 Processor – TI's proven BLE SoC
- XBee Form Factor – Drop-in compatible with XBee sockets
- UART Interface – Simple serial (TTL) communication
- AT Command Set – Configure role, baud rate, name, password, and TX power
- Adjustable TX Power – −23 dBm to +6 dBm
- 30 m Range – In open environments
Specifications
- Bluetooth Version: 4.0 BLE
- Processor: TI CC2541
- Frequency: 2.4 GHz ISM band
- Modulation: GFSK
- Interface: UART (TTL)
- Supply Voltage: 3.3 V DC
- Current Draw: 50 mA
- Operating Temperature: −5 °C to +65 °C
- PCB Size: 24.5 × 30.5 × 0.8 mm
- Certifications: FCC, CE, RoHS
Ideal For
- BLE communication with iOS and Android apps
- Wireless sensor and data logging projects
- IoT prototyping with XBee-compatible sockets
- Remote control and monitoring applications
Package Contents
- 1× HM-11 Bluetooth Low Energy Module
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- AT command set
- An AT command set is a text-based control language sent over a serial terminal to configure a device. It matters because you can change settings such as baud rate and flow control without writing custom firmware.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- BLE
- BLE stands for Bluetooth Low Energy, a Bluetooth mode designed for low power use and broad compatibility with modern phones and computers. It connects well to battery-powered and mobile devices, including Apple hardware, though it behaves differently from Bluetooth Classic and its serial-style profiles.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- TX
- TX means transmit, usually showing data being sent from the board. A TX indicator LED can help you see when the board is communicating or uploading code.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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Related Tutorials
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