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| Parameter Category | Item | Specification Details |
|---|---|---|
| Basic Parameters | Module Model | SU‑03T Offline Voice Recognition Module (Integrated MIC and Speaker) (A052) |
| Core Chip | SU‑03T dedicated offline‑voice chip with built‑in MCU | |
| Communication Interface | UART serial communication | |
| Supply Voltage | 3.3V‑5V DC, 5V power supply recommended | |
| PCB Dimensions | 70.00 mm × 29.00 mm | |
| On‑board Components | Electret microphone (MIC), speaker (SPK1), PWR power indicator LED | |
| Recognition Distance | Typically 1‑3 m; up to 5 m in quiet noise‑free surroundings | |
| Recognition Mode | Local offline voice recognition, no internet connection required, low recognition latency | |
| Typical Response Speed | 100‑300 ms | |
| Product Weight | 25 g (with housing); 12 g (bare PCB) | |
| CN1 Interface Pin Definition | GND | Power ground, must share common ground with the MCU system |
| VCC | Power positive pin, for 5V / 3.3V power input | |
| TXD | Module serial‑port transmit pin, connect to MCU RXD pin | |
| RXD | Module serial‑port receive pin, connect to MCU TXD pin | |
| Core Features‑Offline Operation | No WiFi / internet required. Voice parsing is performed locally; no risk of private‑data upload or leakage | |
| Core Features‑Custom Keywords | Matching host‑computer software supports modification and customization of wake‑up words and control commands | |
| Core Features‑On‑board Speaker | Built‑in loudspeaker for voice feedback playback (command confirmation, status prompt tones). No external audio output device needed. | |
| Core Features‑Low‑power Design | Low quiescent standby current, suitable for lithium‑battery‑powered portable smart devices | |
| Core Features‑Noise‑Reduction & Anti‑interference | Built‑in voice noise‑reduction algorithm; reliably recognizes human‑voice commands in ordinary household indoor environments | |
| Packaging Options | Available Packages | ① Anti‑static bag soft package ② White‑card hanging‑hole gift box ③ Kraft paper box |
