DX-BT05 CC2541 BLE 4.0 Serial Bluetooth Module with UART and AT Commands

DX-BT05 CC2541 BLE 4.0 Serial Bluetooth Module with UART and AT Commands
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  • Product Code:SQ3348
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Tags: DX-BT05, CC2541 BLE module, Bluetooth 4.0 module, serial Bluetooth module, AT-09, UART BLE module, BLE 4.0 transparent transmission, Android iOS Bluetooth, CC2541 SoC, wireless serial bridge

The DX-BT05 is a serial-to-Bluetooth 4.0 Low Energy (BLE) module built around the Texas Instruments CC2541 System-on-Chip. It provides a transparent wireless data bridge between a microcontroller's UART port and Bluetooth-enabled devices such as Android smartphones, iPhones, tablets, and laptops. The module integrates a power-optimized 8051 MCU, in-system programmable flash memory, 8KB RAM, and a 2.4GHz RF transceiver, delivering robust BLE connectivity with low power consumption for embedded and IoT applications. Its default device name appears in the Bluetooth scan list immediately after power-up, and communication is configured through standard AT commands sent over the serial line.

The DX-BT05 BLE 4.0 module supports a 3.3V to 5V DC input supply, making it directly compatible with both 3.3V and 5V microcontroller platforms without external level shifting. The UART interface operates at a default baud rate of 9600bps (configurable via AT commands), and the module supports the Serial Port Profile (SPP) for transparent data transmission. The RF section operates in the license-free 2.400GHz to 2.480GHz ISM band using GFSK modulation, with a Class 2 output power of less than 0dBm. The compact board measures 27mm × 13mm × 2mm, and the module includes an onboard antenna and a status LED for connection indication.

This BLE module is widely used in wireless data transmission projects, remote control and monitoring systems, smart building automation, wireless automotive diagnostic devices, wireless mice and keyboards, alarm and security systems, and general information transfer between embedded systems and mobile devices. Its compatibility with both Android and iOS platforms makes it a practical choice for cross-platform BLE development. The module also supports master-slave mode switching and sleep commands for low-power operation, with standby current in the 90µA to 400µA range and active current around 8.5mA.

DX-BT05 BLE 4.0 module Application

  1. Wireless serial data transmission between microcontrollers and mobile devices
  2. Remote control and monitoring systems
  3. Smart building automation and IoT sensor nodes
  4. Wireless automotive diagnostic (OBD) devices
  5. Wireless mice, keyboards, and HID accessories
  6. Alarm and security system communication
  7. Data transfer in embedded and portable systems
  8. Cross-platform BLE development for Android and iOS

DX-BT05 BLE 4.0 module Specifications

  1. Product Model: DX-BT05 (AT-09 compatible)
  2. Core IC: Texas Instruments CC2541
  3. Bluetooth Version: Bluetooth 4.0 Low Energy (BLE)
  4. Frequency Band: 2.400GHz to 2.480GHz ISM band
  5. Modulation: GFSK
  6. Output Power: Class 2 (<0dBm)
  7. Input Voltage: 3.3V to 5V DC
  8. Logic Level: 3.3V TTL (5V tolerant input supply)
  9. Interface: UART (TX, RX)
  10. Default Baud Rate: 9600 bps (configurable via AT commands)
  11. Protocol Support: UART transparent transmission, SPP
  12. AT Command Support: Yes (baud rate, name, password, role, sleep)
  13. Master/Slave Mode: Configurable via AT+ROLE command
  14. Standby Current: 90µA to 400µA
  15. Active Current: Approximately 8.5mA
  16. Antenna: Onboard PCB antenna
  17. Status Indicator: LED (blinking pattern indicates AT mode and connection state)
  18. Board Dimensions: 27mm × 13mm × 2mm
  19. Operating Temperature: -40°C to +85°C (typical for CC2541)
  20. Pin Pitch: 2.54mm
  21. Compatibility: Android, iOS, PC, MAC

Features

  1. Bluetooth 4.0 Low Energy (BLE) connectivity based on the TI CC2541 SoC
  2. UART serial interface for transparent data transmission
  3. Wide input supply range of 3.3V to 5V DC for direct microcontroller compatibility
  4. Configurable via standard AT commands (baud rate, device name, password, role)
  5. Default baud rate of 9600bps, adjustable through AT commands
  6. Master and slave mode support with AT+ROLE switching
  7. Ultra-low standby current of 90µA to 400µA
  8. Active current of approximately 8.5mA
  9. Onboard PCB antenna with 2.4GHz GFSK RF transceiver
  10. Status LED with blinking patterns for AT mode and connection indication
  11. Compatible with Android, iOS, PC, and MAC platforms
  12. Compact board dimensions of 27mm × 13mm × 2mm
  13. Supports sleep mode via AT+SLEEP command
  14. Ideal for wireless data bridging, remote control, and IoT sensor applications

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