DX-BT05 BLE 4.0 Bluetooth UART Module (CC2541), HM-10 Replacement
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Prices updated: 12 Oct 2026
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About this product
A Bluetooth 4.0 BLE serial module built on the CC2541 chip, used to add wireless UART communication to microcontroller projects. It is listed as a replacement for the HM-10 module, with an on-board antenna and an effective range of about 40 m. It is commonly used to exchange serial data between a board and a phone app.
Specifications
- Bluetooth version
- 4.0 (BLE)
- Chip
- CC2541
- Interface
- UART (serial)
- Antenna
- On-board
- Modulation
- GFSK
- Effective range
- 40 m (as listed)
- Size
- 27 x 13 x 2 mm
Frequently asked questions
How do I wire it to an Arduino?
Connect VCC and GND to a suitable supply, then cross the serial lines: the module's TXD goes to the Arduino RX pin and the module's RXD goes to the Arduino TX pin. Most HM-10-type modules use 3.3 V logic, so add a voltage divider or level shifter on the Arduino TX to module RXD line when using a 5 V board.
Is it compatible with HM-10 apps and firmware?
The listing presents it as an HM-10 replacement, and modules of this type are generally configured with AT commands and work with common BLE serial apps. Verify the AT command behavior of your firmware version before relying on it in a project.
