Bluetooth Module HM-10 BLE 4.0 CC2540

HM-10 BLE 4.0 as a readily available Bluetooth 4.0 module designed as Wireless Serial Communication allows use with any microcontroller.  It supports the UART protocol for easy transfer and receives data wirelessly. This module is the most demanding and popular due to its low cost and extremely high features. And designed by using the Texas Instruments CC2540 or CC2541 Bluetooth low energy (BLE) System on Chip (SoC).

This module works as both Master and Slave Mode and easy switchable between these two modes. By default, Slave mode is configured. And the configured Modes changed using AT Commands. While working in slave mode, HM-10 BLE 4.0 cannot initiate a connection to another Bluetooth device but can accept connections. Whereas in Master mode, it initiates a connection to other devices.

This serial port Bluetooth module features fully qualified Bluetooth V4.0 BLE GFSK Modulation with a complete 2.4GHz radio transceiver and baseband. The HM-10 BLE 4.0 is a 12 pin general-purpose input-output pin wireless serial communication device that is capable to add two-way (full-duplex) wireless functionality to our projects. The module communicates using the UART protocol at a baud rate of 9600. Hence it is easy to interface with any microcontroller that supports UART. The onboard LED present on the board indicates the connection status, whether the Bluetooth connection or not. This red LED blinks continuously in a periodic manner before connecting to the module. When connected to any other Bluetooth device, its blinking slows down to two seconds.

These modules are used for short-distance wireless communication purposes within a range of fewer than 100 meters. Moreover, this module is perfect where power consumption is an issue. So this module is widely used on mobile systems.