Bluetooth Voice Chip WT2801 for Blood Glucose Meters

Abstract

This white paper introduces the functions, background, and market environment of blood glucose meters, with a focus on the integration of the WT2801-32N Bluetooth voice chip. Through analysis of application cases, working principles, and technical features, the document highlights the advantages of the WT2801-32N solution in cost, design simplicity, and user experience enhancement. It concludes with insights into the role of standardized voice chips in the consumer electronics sector.

I. Product Functions, Background, and Market Overview

1. Product Functions

A blood glucose meter is a portable medical device for rapid measurement of blood glucose concentration. It collects a small blood sample from the fingertip, arm, or other sites, and applies electrochemical or photometric methods to provide real-time digital readouts. As a core diabetes management tool, it helps users monitor and manage their health effectively.

2. Background

Since the 1980s, countries such as the United States and the United Kingdom have conducted extensive research on intensive glucose control. Results confirmed that correct use of blood glucose meters improves treatment outcomes. Even without symptoms, high glucose levels cause ongoing pathological damage and complications. The American Diabetes Association praised the blood glucose meter as “a milestone in the history of diabetes treatment,” placing blood glucose monitoring among the five major therapeutic measures alongside medication.

3. Market Environment

1. High prevalence of diabetes: China has more than 140 million diabetes patients, ranking first globally. Younger patients (30–45 years old) increased from 12% in 2015 to 18% in 2024. The large patient base drives rapid growth in home-use blood glucose monitoring demand.
2. Aging population: Diabetes prevalence among people aged 60 and above has reached 20.4%, further expanding the consumer base.
3. Rising health awareness: Consumers are shifting from “passive treatment” to “active health management.” Household penetration of blood glucose meters rose from 42% in 2019 to 61% in 2024, with OTC channels accounting for more than 55%.

II. Application Case: WT2801-32N in Home-Use Blood Glucose Meters

1. System Overview

The home-use blood glucose meter is composed of:

LCD display and driver circuit

• Main MCU
• WT2801-32N Bluetooth voice chip
• External button circuit
• LCD display and driver circuit

Design Block Diagram

Circuit schematic diagram

2. Working Principle

• Data is collected by the CGM glucose sensor and converted into analog signals.
• The main MCU processes signals via ADC to calculate glucose values.
• Results are compared with preset thresholds and displayed.
• If exceeded, data is transmitted via serial port to the WT2801 chip, which drives a speaker to broadcast the abnormal value.
• Test results can be transmitted via Bluetooth to mobile apps or WeChat mini-programs for storage, average calculation, and health tracking.
• Buttons allow configuration of thresholds, playback duration, and repeat intervals. Settings are shown on the display.

BOM List

Component	Model / Feature Description
Voice Chip	WT2801-32N
Main Control MCU	Select different models depending on actual product requirements
CGM Glucose Monitoring Sensor	Select different models depending on actual conditions
Resistors and Capacitors	Select different models depending on actual product requirements
Speaker	Select different models depending on actual product requirements
Key Peripherals	Select different models depending on actual product requirements
……	……

3. Application Summary

Adopting the WT2801-32N chip provides:

• Simple circuitry and low cost
• Expanded display and alarm features via MCU integration
• Bluetooth-based data exchange with mobile apps
• Reduced complexity for developers in voice and Bluetooth handling
• Enhanced efficiency and improved user experience

Solution Advantages:

1. Low overall cost
2. Simplified peripheral circuits for fast, stable production
3. Voice broadcast support for results, prompts, and alerts, improving accessibility for elderly and visually impaired users
4. Bluetooth integration enabling health trend charts, medication reminders, and doctor collaboration
5. Low battery detection with voice alerts
6. Low-power Bluetooth features for extended standby time

III. Technical Features of WT2801-32N

• Supply voltage: DC 2.0–3.6V
• High-performance 32-bit processor
• Compliant with Bluetooth SPP 4.2 / BLE 5.0 standards
• Supports both SPP and GATT Server applications
• UART serial transparent transmission function
• Default baud rate: 115200 (configurable)
• AT command support for Bluetooth name and baud rate configuration
• IO pin indication of Bluetooth connection status (high = connected, low = disconnected)
• Supports ATO firmware upgrades

IV. Conclusion

WayTronic, a high-tech enterprise specializing in voice technology, adheres to the principle of “serving engineers well” and aims to standardize voice interaction components. The WT2801-32N application design has already demonstrated mature implementation in home-use blood glucose meters.

Consumer electronics remain a strategic development focus for WayTronic. Looking forward, the company will introduce standardized voice chips across more industries, further improving engineering design efficiency and empowering the standardization of consumer electronics.