HC-05 6pin Bluetooth Module with Button (Non-Compatible versions Type-D )

SKU: FA2039-1-3
Bluetooth Protocol

Bluetooth V2.0 + EDR
Operating Voltage

3.6V – 6.0V DC
Operating Current

Pairing: 30mA; Active Transmission: 8mA – 12mA
Logic Level

3.3V (VCC is 5V compatible; RX requires 3.3V logic)
Frequency Band

2.4GHz ISM Band
Modulation

GFSK (Gaussian Frequency Shift Keying)
Default Baud Rate

9600 (Data) / 38400 (AT Command Mode)
Default Pairing PIN

1234 (Commonly)
Transmission Range

~10 Meters (Class 2)
Sensitivity

≤-84dBm at 0.1% BER
Product Description
The HC-05 (Non-Compatible Type-D) is a specialized version of the industry-standard Bluetooth 2.0+EDR serial pass-through module. While it maintains the core functionality of the HC-05—acting as a Master or Slave dual-role wireless bridge—the Type-D variant is distinguished by its unique firmware and hardware layout.
“Non-Compatible” refers to its specific command set and timing requirements, which may differ from generic Type-A or Type-B clones. This makes it an excellent choice for businesses and developers who require a consistent, specific hardware revision for proprietary systems. It features an onboard tactile button to manually trigger AT Command Mode, allowing for deep customization of the device name, pairing PIN, and baud rate. Mounted on a robust 6-pin breakout board with a 3.3V LDO regulator, it is designed for stable serial communication between microcontrollers, PCs, and Android devices.
Key Features
  • Master/Slave Switchable: Fully configurable to either initiate connections (Master) or accept them (Slave), enabling peer-to-peer module communication.
  • Onboard Configuration Button: A dedicated physical switch provides a reliable hardware method to enter “Command Mode” for internal settings adjustments.
  • Type-D Specific Firmware: Offers a stable and consistent instruction set for specialized industrial applications where generic “compatible” modules may vary.
  • Transparent Data Transfer: Functions as a wireless serial port; once paired, data is transmitted seamlessly without needing complex protocol handling.
  • Wide Input Voltage: The integrated baseboard supports a 3.6V to 6V power range, making it compatible with standard 5V logic systems and battery packs.
  • Visual Status LED: Onboard LED indicates searching (fast flash), AT mode (slow flash), and connected status (double-flash).
Usage Scenarios
  • Industrial & Business: Wireless monitoring of PLC systems, cable replacement for RS232 serial scales, and long-term deployment in standardized commercial hardware.
  • Advanced Makers: Multi-module mesh-like setups where one HC-05 Master controls several Slave units, and custom Android-based remote control interfaces
Q: What does "Non-Compatible Type-D" mean?

It indicates that this module uses a specific hardware/firmware revision that may not respond to the exact same AT command timings as generic “Type-A” modules. It is ideal for users who have tested this specific version and need to ensure their software remains compatible with future hardware purchases.

Q: How do I enter AT Command Mode on this version?

Press and hold the onboard button, then apply power to the module. The LED will blink slowly (once every 2 seconds). You can then send commands via a serial monitor at the 38400 baud rate

Q: Can I use this with my iPhone?

No. Like all HC-05 modules, this uses Bluetooth Classic. iOS devices only support “Bluetooth Low Energy” (BLE) for serial data. This module is compatible with Android, Windows, and Linux

Q: Can I connect a Type-D module to a Type-A or Type-B module?

Yes. Once they are configured (one as Master, one as Slave) and have the same pairing PIN, they can communicate with each other regardless of their specific hardware “Type.”

Q: Is a level shifter necessary?

While the module is powered by 5V, its data pins (RX/TX) operate at 3.3V. For the best long-term reliability in industrial environments, we highly recommend using a voltage divider or level shifter on the RX pin when connecting to a 5V microcontroller

Q: Will it remember my Baud Rate settings?

Yes. All settings changed in AT mode are saved to the internal Flash memory and will remain even if the module is powered off.

Related products