WTV-SR Voice Recorder Module is a cost-effective voice recorder module that supports MP3 mode, key-by-key mode, parallel mode, key-by-key recording mode, recorder e-book, two-wire serial control mode and three-wire serial control mode. It can be widely used in home appliances, telephone recording, conference recording, monitoring equipment, advanced entertainment toys and teaching equipment.
The WTV‑SR is a voice‑recording module designed for applications such as telephone recorders, conference recorders, monitoring equipment, toys and teaching devices. It uses an external SPI‑Flash for storage and supports multiple control modes, making it suitable for secondary development of various electronic products.
This manual covers the module's hardware architecture, electrical parameters, supported control modes (MP3, key‑to‑key, parallel, two‑wire and three‑wire UART, e‑book), wiring diagrams, software interface description, operation flow, and version history. It also provides detailed specifications such as supply voltage, recording time, sampling rates, and pin functions. This manual is written in Chinese.
| Supply Voltage | DC 3.3 V |
|---|---|
| Maximum SPI‑Flash Capacity | 64 Mbit |
| Supported Sampling Rates | 10 kHz or 14 kHz |
| Maximum Voice Segments | 252 segments |
| Volume Levels | 8 levels |
| Operating Temperature | 0 °C ~ 70 °C |
| Storage Temperature | -20 °C ~ +85 °C |
The module operates from a DC 3.3 V supply.
The module can store up to 252 voice segments, including fixed prompts.
It supports MP3 mode, key‑to‑key mode, parallel mode, two‑wire UART mode, three‑wire UART mode, e‑book mode and key‑record/play mode.