HM-10 BLE Bluetooth 4.0 CC2541 Wireless Module

HM10 BLE Bluetooth 4.0 module

The HM-10 Bluetooth module is a widely available and inexpensive Bluetooth 4.0 module that enables wireless data communication. As the cheapest Bluetooth module with 4.0 technology, it offers the latest advancements at an affordable rate. Based on the TI CC2540 or CC2541 Bluetooth SOC, this small 3.3v SMD Bluetooth 4.0 BLE module has become a popular choice for use with the Arduino due to its standard UART serial connection, which makes it easy to connect to the board.

There are two versions of the HM-10, namely the HM-10C and the HM-10S, with both offering multiple communication methods. However, what sets the HM-10 apart from other bluetooth modules is its latest technology at the most affordable prices.

Although the HM-10 is Bluetooth version 4.0 only, it is capable of supporting iPhone 4s or later, and it can be used to add Bluetooth features to any project. One of its key features is its low power consumption, making it a suitable choice for continuous data-sending devices in IoT applications. It is worth noting that the HM-10 cannot connect to Bluetooth 2/2.1 modules such as the HC-06 and HC-05 due to its 4.0 technology.

Pin Description of HM-10 BLE Bluetooth 4.0 CC2541 Wireless Module

• STATE: state test pins, connected to an internal LED, generally keep it unconnected.
• BRK: break connect, it means breaking the Bluetooth connection, generally keep it unconnected.
• VCC: positive pole of the power source.
• GND: Ground.
• TXD: serial interface, transmitting terminal.
• RXD: serial interface, receiving terminal.

Features

1. It’s easy to use and completely encapsulated.
2. You can set it as a slave or master.
3. You can use the AT command set the baud rate.
4. Coverage up to 60 meters.
5. Built-in PCB antenna.
6. UART design.
7. Support bridge direct-driven mode simultaneously (no need for extra CPU).
8. 20ms connection interval (default), quick to connect; Support AT instruction, to modify the baud rate of the serial port, gain MAC address and modify module name.
9. Support AT instruction, to adjust the Bluetooth connection interval and control the forwarding rate (dynamic power consumption adjustment).
10. Support APP; IO expansion.
11. 2 channel ADC input (14 bit).
12. 4 channel PWM (120Hz) output.
13. The RSSI successive acquisition, auto read, and notification to APP (used in anti-lost alarm).
14. Power indicator/alert.
15. Support anti-hijack password setup, modification, and restoration.
16. Ultra-low power consumption standby mode.

Specification

Advantages of this module

1. Internal logic level conversion circuit. No need for external conversion of 5V level to 3.3V level
2. The power input port has an anti-reverse circuit. Avoid accidentally plugging the power supply backwards, which may cause the module to burn out.  

Applications

• Wearable devices
• Bluetooth intelligent application
• Mobile phone accessories
• RFID labels
• Smart home appliances
• Industry control
• Data acquisition system

Tutorials

We have used this module in one of the bootloader projects. You can refer to that tutorial.

• AT Commands

Package Includes

• 1 x HM-10 BLE Bluetooth 4.0 CC2541 Wireless Module.