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HM-10 Bluetooth Module-China Make

HM-10 Bluetooth Module-Robocraze

HM-10 Bluetooth Module-China Make

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  • Bluetooth 4.0 module with Bluetooth Low Energy (BLE) and transmits over 2.4 GHz ISM band
  • Uses Texas Instruments CC2540 or CC2541 BLE System SoC (System on Chip)
  • Available in two versions: HM-10C for remote control with PIO status and HM-10S for data transmission
  • Controlled through AT commands for wireless data communication
  • Small and compact with a 3.3v SMD design
  • Popular for use with Arduino due to its standard UART serial connection

Note: This module doesn't get connected to mobile Bluetooth directly but can be connected using BLE Scanner App in mobile.

HM-10 Bluetooth Module-China Make

The HM-10 module is a small Bluetooth 4.0 module that utilizes the Texas Instruments CC2540 or CC2541 BLE System SoC (System on Chip). It operates on 3.3v SMD and can be controlled through the serial UART connection by sending AT commands. The main purpose of the HM-10 module is for wireless data communication, but it is crucial to note that it can only connect with Bluetooth 4.0 based modules, and not with Bluetooth 2/2.1 modules like HC-05 and HC-06.

Due to its standard UART serial connection, the HM-10 bluetooth module is widely used with the Arduino and is available in two versions: HM-10C and HM-10S. The HM-10S is primarily for data transmission, whereas the HM-10C serves as a remote control version with PIO status. The HM Bluetooth modules use CSR or TI CC254x or Cypress chips, allowing them to operate as both master and slave roles.


Pinout Of HM-10 Bluetooth Module


  • Bluetooth 4.0 module that includes Bluetooth Low Energy (BLE) and transmits over the 2.4 GHz ISM band
  • Based on the TI CC2540 or CC2541 Bluetooth SOC (System On Chip)
  • Available in two versions: HM-10C and HM-10S
  • This module doesn't get connected to mobile bluetooth directly but can be connected using BLE Scanner App in mobile.
  • Controlled via AT commands and designed for establishing wireless data communication
  • Small 3.3v SMD Bluetooth 4.0 BLE module
  • Popular for use with the Arduino due to its standard UART serial connection that makes it easy to connect to an Arduino

Package Includes:

  • 1 x HM-10 Bluetooth Module

Features of the HM-10 Bluetooth Module

BT Version

Bluetooth Specification V4.0 BLE

Working Frequency

2.4GHz ISM band

Modulation method

Gaussian Frequency Shift Keying


6K Bytes


3.3V 50mA


26.9mm x 1 3mm x 2.2 mm


5 grams

1.How do I connect my HM-10 Bluetooth module?

  • To connect your HM-10 Bluetooth module, you will need to follow these general steps:
    • Power on the HM-10 module by supplying it with 3.3V power.
    • Check the LED on the HM-10. If it's blinking slowly, then the module is in AT mode. If it's blinking fast, then it's in data mode. If it's not blinking at all, then there's no power or the module is damaged.
    • Make sure that your device (e.g. smartphone, computer, etc.) has Bluetooth turned on and is discoverable.
    • Use a serial terminal program, such as PuTTY or Arduino IDE, to communicate with the HM-10 module via a USB-to-serial converter or a microcontroller.
    • Send the AT commands to the HM-10 module to configure it. For example, to set the name of the HM-10 to "MyModule", send the command "AT+NAME=MyModule".
    • Set the module to slave mode by sending the command "AT+ROLE0" to enable it to be discoverable by other Bluetooth devices.
    • Pair your device with the HM-10 by searching for nearby devices on your device's Bluetooth settings and selecting the HM-10.
    • Once the devices are paired, you can send and receive data between them using the appropriate protocol

2.What is the PIN code for HM-10?

  • The default PIN code for the HM-10 Bluetooth module is "0000" (four zeros). However, it's important to note that you can change the PIN code to a different value using the AT command "AT+PINxxxx" where "xxxx" is the new four-digit PIN code you want to use. It's recommended to change the default PIN code to a unique value for security reasons.

3.What voltage for HM-10 Bluetooth?

  • The HM-10 Bluetooth module is designed to operate with a supply voltage of 3.3V. Applying a voltage higher than this can damage the module. It's important to use a voltage regulator or a voltage level shifter if you are connecting the HM-10 to a device that operates at a higher voltage level, such as 5V, to ensure the module is not damaged.