(Verified) ESP32 offline voice desktop assistant

Based on the ESP32 offline voice manager, this design can control intelligent devices at home through voice recognition.

1. This design can be controlled without relying on the network environment.

2. You can configure MQTT parameters to connect to the current mainstream smart home system HomeAssistant.

3. This design is compact in size and has a built-in 1.3-inch OLED screen or serial screen, which can realize data visualization interaction.

4. This design has a built-in offline voice module CI-C22GS02S, which has the characteristics of small size, easy development, and high recognition rate.

1. Adopt Type-c power supply method

2.AMS1117-3.3 IDO serves as a regulated power supply for ESP32-S and CI-C22GS02S

3.CH340K is used as a serial port chip.

4.1.3-inch OLED screen as interactive.

5.ESP32-S serves as the master controller. Processing data and networking.

6. Add WS2812 as a status display light.

7. Add DDC114TU-7-F as automatic download circuit

8. Add two servo interfaces as right-hand men (it has been tested that starting two servos at the same time will cause insufficient power supply, so the plan is changed)

9. The voice chip leads to the programming interface for easy debugging.

10. Reserved interfaces for microphones and speakers. Convenient for expansion and upgrade.

3. Software part

ESP32-S uses Arduino as development platform

CI-C22GS02S offline voice uses eclipse as the development platform

ESP32-S implements offline voice data interaction with CI-C22GS02S through the soft serial port.