WTK6900HA-M02 Voice Recognition Module
160MHz AI Core · 3m Far‑Field · 1MB Flash · Ultra‑Low Power 15‑20mA · SOP16
The WTK6900HA-M02 is a cost‑effective voice recognition module based on the WTK6900HA chip in SOP16 package. It features a 160MHz 32‑bit core with FPU, 1MB SPI Flash, and advanced DNN‑HMM neural network algorithms for 3‑meter far‑field voice pickup. With ultra‑low power consumption (15‑20mA) and no external crystal required, it is ideal for battery‑powered and space‑constrained applications.
- 160MHz CPU with floating‑point unit
- 3m far‑field reliable recognition
- 1MB SPI Flash
- Ultra‑low power 15–20mA
- No external crystal required
- OTA upgrade support
Key Features
Technical Specifications
| Parameter | Value / Condition |
|---|---|
| CPU Frequency | 160 MHz (with FPU) |
| Flash Memory | 1 MB (SPI) |
| DAC | 16‑bit, SNR ≥ 95dB |
| ADC | 16‑bit, SNR ≥ 90dB |
| Audio Formats | MP3, WAV (8–48 kHz) |
| Supply Voltage | 2.2V – 5.5V |
| IO Level | 3.3V TTL |
| Microphone | Electret (ECM) with built‑in bias |
| Speaker Output | 8Ω / 1W (via WT8002) |
| UART | 1 full‑duplex |
| Operating Temperature | –40°C ~ +85°C |
| Module Dimensions | 40 × 30 × 6.55 mm |
| Package | SOP16 (on module) |
Pin Description – 13‑Pin Interface
| Pin | Name | Function |
|---|---|---|
| 1 | MIC+ | Microphone positive |
| 2 | MIC− | Microphone negative |
| 3 | SPK+ | Speaker positive (8Ω 1W) |
| 4 | SPK− | Speaker negative |
| 5 | WT8002 | Onboard amplifier IC |
| 6 | Chip | WTK6900HA-16S (SOP16) |
| 7 | LED (SPK) | Red when idle, off when working |
| 8 | LED (TX) | Green when TX active |
| 9 | VCC | Power input (2.2–5.5V) |
| 10 | GND | Ground |
| 11 | TX | UART transmit (3.3V) |
| 12 | RX | UART receive (3.3V) |
| 13 | Type‑C | 5V power input (1A/2A) |
Command Output Examples
| Command | UART Output (Hex) |
|---|---|
| Power‑on (auto) | 7E 06 FF A0 00 03 AF EF |
| Wake‑up: “小蜂管家” | 7E 06 FF 06 01 01 0D EF |
| “打开灯光” (Turn on light) | 7E 06 FF 06 01 02 0E EF |
| “关闭灯光” (Turn off light) | 7E 06 FF 06 01 03 0F EF |
| “调亮灯光” (Brighten) | 7E 06 FF 06 01 04 10 EF |
| “调暗灯光” (Dim) | 7E 06 FF 06 01 05 11 EF |
| 10s idle exit | 7E 06 FF 06 01 0A 16 EF |
Protocol: 7E + Length + Ext + Cmd + ID + Checksum + EF. Passive playback and volume control supported.
WTK6900HA-M02 Applications
Why Choose WTK6900HA-M02
FAQs
What is the WTK6900HA-M02?
A low‑power voice recognition module with 160MHz CPU, 1MB Flash, and 3m far‑field in SOP16 package.
What is the recognition range?
Up to 3 meters.
Does WTK6900HA-M02 require an external crystal?
No, WTK6900HA-M02 uses an internal RC oscillator.
What is the power consumption?
15–20mA in active mode.
Can I update voice commands?
Yes, via OTA or the Waytronic online platform.
Note: The WTK6900HA-M02 module includes onboard WT8002 amplifier (1W/8Ω). UART is 3.3V TTL. For custom command sets, contact Waytronic or use the online voice platform.
