Smart locker voice solution based on NV040C voice chip

Smart lockers are also called automatic baggage lockers, electronic lockers, electronic lockers, etc. They can help shoppers or people who are entertaining and relaxing to ensure the safety of their property in our daily lives. Smart lockers have been widely used in supermarkets, department stores, schools, libraries, entertainment venues, factories, offices, hospitals, movie theaters, swimming pools, beaches, subway stations, railway stations, airports and other public places.

Smart lockers are usually equipped with voice chips to realize the artificial voice prompt function. When storing items, users will receive voice prompts to remind them to close the door.

NV040C voice chip smart locker voice solution:

NV040C supports a set of PWM output ports, can directly drive a 0.5w speaker, has a built-in LVR reset, an internal resistance frequency oscillator (maximum error is only +-1%), does not require external resistors, can be seamlessly connected to the MASK mask with multiple key triggering methods, and the main MCU one-line serial port control method and supports 220-segment sound and 44100 sampling rate 8-pin voice chip.

Voice content of NV040C voice chip on the locker (entries can be customized):

1.Please press your finger;

2. Please swipe your card;

3. Please enter your password.

4. Wrong password;

5. Please take the password paper;

6. Please save;

7. Close the door of the box;

8. The number box has been opened;

9. The number box is locked;

10. Please enter the box number and password

11. Verification failed

12. The box has been opened. Please take out all items and close the door.

13. The barcode is invalid;

14. The box is full.

NV040C voice chip control mode:

NV040C voice chip has rich control modes. It is divided into key control module and MCU one-line serial port control mode. The key control module is divided into ON/OFF control, pulse repeatable trigger, pulse non-repeatable trigger, level hold trigger, level non-hold trigger, DOWN next song, random segment trigger. When port 1 is assigned as MCU one-line trigger, it cannot be used as a key trigger at the same time.

①Button control module

Key control mode: The defined pins can directly trigger the chip to play sound, that is, each pin can control the playback of a voice. The triggering mode of each switch can be set separately, and the anti-jitter time of the key control mode is 17ms

②Port allocation

Key mode - low level trigger

① Press button to play

1. The level (button) can be interrupted
2. The level (button) cannot be interrupted
3. The level (button) can be kept cyclic

4. Level (button) remains non-looping

Power on and play: 1. Power on and play once 2. Power on and play repeatedly

② Press button to play

Level interruptible: Press the button to play the voice. When the voice is playing, press the button again to restart the playback.

The level cannot be interrupted: press the button to play the voice, and when the voice is playing, press the button again to continue playing the voice

Until the previous paragraph is finished, ignore the key operation. The key will only work after the voice is finished.

Level keeps looping: As long as the button is pressed (the level is always triggered), the voice will keep playing in a loop.

Level remains non-looping: The button is kept pressed (the level is always triggered), and the voice will stop playing after playing once.

Play once on power on: After power on, the voice will play once and then stop.

Power-on playback loop: After power-on, the voice will be played in a loop.

Note: Pins 123 can be connected to buttons, and unused pins can be left floating.

MCU two-wire serial port trigger

MCU two-wire serial port control means that the main control MCU controls the triggering and stopping of any voice through the DATA line. The timing adopts the following timing.

① Port allocation

②The correspondence between data and voice

It supports sending 223 voices and commands. The format of sending voice addresses and commands is the same, and the sending is independent of each other.

NV040C voice chip pin diagram and corresponding table: