KT6368A Bluetooth Module - An Efficient Bridge for Data Interoperability in Electronic Medicine Boxes

Key Features of the Core Chip: Dual Benefits of Low Power Consumption and High Compatibility

The KT6368A is a Bluetooth 5.1 chip supporting both SPP + BLE dual-mode, offering stable wireless connectivity to electronic medicine boxes with its SOP8 packaging (pin pitch 1.27mm) and lightweight design.

Key specifications include:

• Flexible Dual Mode Switching: Supports both BLE (Low Energy) and SPP (Classic Bluetooth), switchable via AT commands (B4/B5). This allows compatibility with different devices, such as mobile apps using BLE and medical terminals utilizing SPP.

• Optimized for Low Power Consumption: The standard KT6368A consumes around 6mA in connection state; the low-power version KT6328A (BLE only) has an average broadcasting current of just 100uA at a broadcast interval of 1000ms, significantly extending battery life.

• Stable Communication Performance: With a 24M crystal oscillator (load capacitance 12pF, frequency deviation ≤±10ppm), it ensures RF stability, covering communication distances up to 15 meters, and supports adjusting RF power through AT+BR command (levels 0-9) to fit various environments.

Critical Applications in Electronic Medicine Boxes

• Real-time Medication Data Synchronization: After establishing a BLE connection with a mobile app, the medicine box can upload medication records (time, dosage) to the app via UUID "FFF1" characteristics, supporting single packet data transmission of 1024 bytes. MTU negotiation enables bulk file transfers, e.g., historical records synchronization.

• Remote Control and Status Query: Users can remotely operate the device via the app:Send “AT+BM” to change the Bluetooth name (e.g., “Grandma’s Medicine Box”)Adjust broadcast intervals by sending “AT+UT” (balancing between power consumption and connection speed)Receive status feedback from the medicine box through “FFF2” characteristics (e.g., “20% Remaining Medication”)

• Security and Compatibility Design: Password protection via AT+BE command (4-digit numeric password) prevents unauthorized access in SPP mode. The MAC address embedded in advertising packets solves iOS's inability to directly obtain MAC addresses, facilitating unique device identification.

Advantages in Development and Mass Production

• Simplified AT Command Set: Supports quick configuration for common functionalities (e.g., setting baud rate to 115200 with “AT+CT05”, resetting to factory defaults with “AT+CW”), eliminating complex protocol development.

• Hardware Design Reference: External antenna wiring is sufficient (length should match PCB layout); recommended crystal oscillators include 3225 package (cost-effective) or M49 (high stability), requiring no additional matching capacitors.

• Mass Production Support: Provides Bluetooth test equipment for frequency offset detection (qualified range ±20KHz) and supports tape-and-reel packaging (1000 pieces per reel), suitable for SMT production lines.

Learn more about KT6368A here.