WTK6900FC-M01 Voice Recognition Module
AI‑Powered Voice Recognition with 5–8m Far‑Field, 300 Offline Commands & 95dB SNR Audio
The WTK6900FC-M01 is a high‑performance voice recognition module designed for local voice trigger applications. Powered by a 220MHz CPU with a dedicated BNPU V3 neural network accelerator, it delivers 5–8 meter far‑field voice recognition with 300 offline command words and up to 98% recognition accuracy. With 95dB SNR audio codec, built‑in 2MB Flash and 640KB SRAM, and UART control, it is the ideal solution for smart home appliances, industrial controls, and automotive voice applications.
- 220MHz AI core – high‑performance processing
- 5–8m far‑field – room‑scale voice pickup
- 300 offline commands – no cloud required
- 98% accuracy – reliable recognition
- 95dB SNR – high‑quality audio input/output
Voice Recognition Selection Guide
| Model | Recognition Range | Commands | Self‑Learning | Languages | Power | Package |
|---|---|---|---|---|---|---|
| WT2606A | 3–5m | 10 wake + 300 commands | ✘ | CN, EN | 30–40mA | QFN40 |
| WTK6900FC-M01 | 5–8m | 10 wake + 300 commands + 20 self‑learn | ✓ (20 commands) | CN, EN, JP, KR | 50–60mA | SSOP24 |
| WTK6900HC | 5–8m | 10 wake + 300 commands | Wake only | CN, EN | 25–30mA | SOP16/SSOP24/QFN32 |
| WTK6900HA | 3–5m | 10 wake + 300 commands | ✘ | CN, EN | 15–20mA | SOP16/SSOP24/QFN32 |
| WTK6900L | 0.5–3m | 20 commands | ✘ | CN | 20–25mA | SOP8 |
WTK6900FC-M01 offers the most comprehensive feature set with far‑field recognition, self‑learning, and multi‑language support.
Key Features
Technical Specifications
| Parameter | Value / Condition |
|---|---|
| Module Size | 36 × 31 × 5.66 mm |
| CPU Frequency | Up to 220 MHz |
| Flash Memory | 2 MB |
| SRAM | 640 KB |
| eFuse | 512‑bit for encryption |
| PMU Input Voltage | 3.6V – 5.5V (5V typical) |
| IO Interface Level | 3.3V TTL |
| Speaker Output | 8Ω / 1W (max 460mA) |
| Working Current (Active) | ≤ 460 mA (with speaker) |
| Working Current (Standby) | ~50–60 mA |
| Audio Formats | MP3, 16k–24kbps |
| Microphone Input | ECM (electret condenser microphone) |
| Recommended MIC | JMO-627BA283R-10TC38 (sensitivity: -28dB, S/N: 70dB) |
| UART Baud Rate | 115200 (configurable) |
| Operating Temperature | ‑10°C ~ +70°C |
| Storage Temperature | ‑55°C ~ +150°C |
Pin Functions (10‑Pin Module)
| Pin | Name | Function |
|---|---|---|
| 1 | GND | Ground |
| 2 | RX | UART receive (data input) |
| 3 | TX | UART transmit (data output) |
| 4 | VCC | Power input (3.6–5.5V) |
| 5 | MIC+ | Microphone positive |
| 6 | MIC− | Microphone negative |
| 7 | SPK+ | Speaker positive (8Ω 1W) |
| 8 | SPK− | Speaker negative |
| 9 | D101 | Type‑C power input |
| 10 | D100 | Type‑C power input |
Type‑C power input is shared with VCC. The module uses 3.3V TTL for UART communication.
Command Output Examples
| Command Word | UART Output |
|---|---|
| Wake: “智能管家” (Smart Butler) | 7E 06 FF 06 01 01 0D EF |
| “打开空调” (Turn on AC) | 7E 06 FF 06 01 02 0E EF |
| “关闭空调” (Turn off AC) | 7E 06 FF 06 01 03 0F EF |
| “增大风速” (Increase fan speed) | 7E 06 FF 06 01 04 10 EF |
| “升高一度” (Increase temperature) | 7E 06 FF 06 01 06 12 EF |
| “全自动” (Full auto) | 7E 06 FF 06 01 08 14 EF |
| “打开台灯” (Turn on desk lamp) | 7E 06 FF 06 01 34 40 EF |
| “最高亮度” (Maximum brightness) | 7E 06 FF 06 01 36 42 EF |
Protocol: 7E + Length + Extension + Command + ID + Checksum + EF. Over 90 pre‑loaded commands available.
Application Scenarios
Why Choose WTK6900FC-M01
Frequently Asked Questions
What is the WTK6900FC-M01?
WTK6900FC-M01 is a high-performance voice recognition module featuring a 220MHz CPU, BNPU V3 neural accelerator, 5–8 meter far-field recognition, 300 offline command words, 95dB SNR audio codec, and UART control. It supports Chinese, English, Japanese, and Korean.
What is the recognition range?
WTK6900FC-M01 supports 5–8 meter far-field voice recognition, making it suitable for room-scale voice control applications in smart homes and industrial settings.
How many offline commands are supported?
The WTK6900FC-M01 module supports up to 300 offline command words, enabling voice control without cloud connectivity.
What languages are supported?
WTK6900FC-M01 supports Chinese, English, Japanese, and Korean, with flexible customization options for additional languages.
What AI algorithms are used?
The module uses DNN-HMM deep neural network-based speech recognition, powered by the BNPU V3 neural network accelerator, supporting DNN, TDNN, RNN, CNN, and parallel vector operations.
What control interface does it use?
It uses a standard UART interface (3.3V TTL) with a 7E … EF protocol. The module outputs command IDs via UART when voice commands are recognized.
What is the operating voltage range?
The PMU input voltage ranges from 3.6V to 5.5V (5V typical). A 460mA power supply is recommended for the speaker output.
What is the recognition accuracy?
In quiet environments, the recognition accuracy reaches up to 98%, with strong anti-interference capability for real-world applications.
What microphone does it support?
It supports electret microphones (ECM). Recommended model: JMO-627BA283R-10TC38 with -28dB sensitivity and 70dB S/N ratio.
What are the typical applications?
Smart home appliances, smart lighting, smart bathrooms, smart toys, industrial controls, automotive voice systems, and any application requiring local voice control and recognition.
Important: The module requires a 3.6–5.5V power supply with 460mA capability for speaker output. UART communication is 3.3V TTL – use level shifting for 5V MCU connections. The module must be stored in a dry environment (5% RH) and soldered within 48 hours after opening. For custom command sets or firmware modifications, contact Waytronic support. The self‑learning feature (wake word + 19 command words) is supported via the dedicated APP.
