Product Performance Parameter Table
Number of Microphones: Single/Dual Microphones.
Speech Recognition Mode: Offline Speech Recognition.
Supported Sound Categories: Chinese Speech, Special Sounds.
Average Power Consumption: As low as 15 mA.
Package Dimensions: Length × Width × Thickness 29 × 18.2 × 2 mm (Module).
Abundant Peripherals: UART × 1, PWM × 6, GPIO × 15 (at most).
Noise Reduction Performance: Supports excellent single-microphone noise reduction and acoustic echo cancellation (AEC) functions.
Speech Recognition Rate: 95% (tested within a distance of 5 meters under the environment of 50 dB background noise).
Number of Instructions: 50 (with a slight deviation depending on the length of the instructions in actual applications).
Response Speed: The recognition response can be completed within 200 ms at the fastest.
Hardware Introduction
The module is single-sided mounted with pins on three sides. It supports single-microphone input and can be directly connected to the module. Meanwhile, it also supports real-person voice replies and can directly drive the speaker.
| Pin number | Pin Names | Functional specification |
| 1 | GND | GND |
| 2 | RF | RF |
| 3 | GND | GND |
| 4 | GPIO31 | Digital I/O Can be used as a detection pin (SD card or LINEIN) |
| 5 | GPIO32 | Digital I/O Can be used as a detection pin (SD card or LINEIN) |
| 6 | GPIO33 | Digital I/O |
| 7 | GPIO11 | Digital I/O |
| 8 | GPIO4 | Default use AUX_INPUT_L |
| 9 | GPIO5 | Default use AUX_INPUT_R |
| 10 | TXD | Digital I/O(The default burning port and user communication port, please reserve them for easy upgrade) |
| 11 | RXD | Digital I/O(The default burning port and user communication port, please reserve them for easy upgrade) |
| 12 | GPIO30 | Digital I/O |
| 13 | GND | GND |
| 14 | MIC5_P | Default AEC+ |
| 15 | MIC4_N | Default AEC- |
| 16 | M1+ | Mic1+ |
| 17 | M1- | Mic1- |
| 18 | M2+ | Mic2+ |
| 19 | M2- | Mic2- |
| 20 | VDD | POWER Power Input |
| 21 | GND | GND |
| 22 | SPK+ | Speaker +(Pin26: LP amplifier output) |
| 23 | SPK- | Speaker -(Pin25: LN amplifier output) |
| 24 | GND | GND |
| 25 | LN | Audio Output L- |
| 26 | LP | Audio Output L+ |
| 27 | RP | Audio Output R+ |
| 28 | RN | Audio Output R- |
Application Areas
Smart lighting, Smart electrical, Smart home appliances, Smart vehicle equipment, Smart speakers, Smart recreational equipment
Smart Home Appliances
Smart Home
Automotive Electronics
Switch
Bathroom Heater
Refrigerator
Air Purifier
Smart toilet
Clothes drying rack
Range hoods
Smart home control center
Air conditioner
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