The Analysis of Wireless Meal Fetching and Calling Device Design Scheme Based on WT588F02B(C006-01)

The Analysis of Wireless Meal Fetching and Calling Device Design Scheme Based on WT588F02B - featured image

With the progress of the times and the integration of Chinese and Western cultures, Chinese service methods and ordering methods are also influenced by foreign cultures. Many merchants begin to provide self-service for customers. After ordering, customers need to go to the front desk or exit to pick up their meals. As customers, especially many young people, because this kind of service is a novel and characteristic service in China, everyone is willing to accept this kind of self-service service. Under such market demand, the food-taking device, which has been very popular abroad, has been greatly recognized by the Chinese market. This wireless call and pick-up device is used to remind customers that the meal is ready and they can get their meal back at the front desk or the exit. I believe everyone has used it in many chain restaurants or individual restaurants in China.

The main application field of wireless call-and-order pick-up device is the catering industry, which solves several pain points of customers and shopkeepers. First, customers don’t need to wait in line for meals, so they can take the pick-up device to find a place to wait for reminders. Second, the store doesn’t need to look for customers all over the store, and it doesn’t need to call customers all the time with loudspeakers, thus affecting the dining environment of other guests; However, the existing wireless calling and picking-up device only has three reminding modes: flashing, vibrating and buzzing, and the prompting is not obvious.

Waytronic WT588F02. This chip is a widely used voice chip, which can directly drive the speaker with 16-bit PWM output, and can better show the charm of sound. At the same time, it is also a data processing chip (DSP) with its own wireless digital communication functions, such as analyzing EV1527 standard communication protocol or customizing communication protocol. In addition, it has a wealth of pins, which can add many additional functions, such as flash lamp, vibrator, digital tube and so on. This is compatible with the flashing and vibration reminding modes of the old-fashioned meal picker, and at the same time, it adds the voice music reminding function. If you still need to display the menu number, you can also add a digital tube display. WT588F02B is also a FLASH-type voice chip, which can be repeatedly erased, supports the power-off memory function, and can realize the low-voltage reminding function without multi-purpose IO pins.

Let’s look deeper into the scheme of wireless module+WT588F02B:

#1 Overview of the design scheme of voice broadcast wireless station-calling and meal-taking device

Picture of the ProductFunctions
Basic Function:
1. Wireless receiving and code checking function
2. Flashing, vibrating and beeping are three prompt modes.
 
New function:
1. Beautiful voice prompt function
2. Power failure memory function
3. Low battery prompt function
 
Expansive Function:
With digital tube display number function

#2 Device selection and schematic diagram

2.1 Device selection:

ModuleFunctions
WT588F02B-8SWithout digital tube display
WT588F02B-24SSWith display function of digital tube

2.2 Design schematic diagram:

2.2.1 the application schematic diagram of wt588f02b-8s is as follows:

the application schematic diagram of wt588f02b-8s
the application schematic diagram of wt588f02b-8s

2.2.2 Introduction of the interface:

Pad NamePad No.Description
PC21Flash drive interface, 3HZ flashing
PC12Wireless signal receiving port
PI03Vibration motor drive port
PI14Function key, high effective
PWMN5Sound output pin, one end of the speaker
VCC6Positive power supply
PWMP7Sound output pin, connect to the other end of the speaker.
GND8Negative power supply

2.2.3 Functions:

Press and hold the PI1 key, then turn on the power, enter the learning pairing mode, and exit the pairing mode after 15 seconds of successful pairing or no action;

After successfully pairing with the host, when receiving the corresponding pairing code, start responding to flashing lights, vibration and voice prompts; Flashing light: flashing three times a second, which lasts all the time;

Vibration: respond three times, once every 0.5 seconds;

Voice prompt: For example, the voice content is “Dear XX customer, your meal is ready, please pick it up at the exit, and have a nice meal”. After playing the voice prompt, play a piece of background music, and then repeat the content after the background music is over.

The above response actions continue until no signal is received;

Press the PI1 key, and you can choose the reminding mode: a, flashing light+vibration; B, flashing light+voice; C, flashing light+voice+vibration.

2.3.1 The application schematic diagram of WT588F02B-24SS with digital tube display is as follows

The application schematic diagram of WT588F02B-24SS with digital tube display
The application schematic diagram of WT588F02B-24SS with digital tube display

2.3.2 Interface Description:

Pad NamePad No.Description
PC6~PC01~7Digital tube connection
PI0/PI18~9Burning interface, temporarily unavailable.
PB5~PB410~11Reserve
PB312Vibration motor drive port
PB213Flash drive interface, 3HZ flashing
PB114Function key
PB015Wireless signal receiving port
PA3~PA016~19Digital tube common terminal
GND20Power ground
PWMP21Sound output pin, one end of the speaker
VCC22Positive power supply
PWMN23Sound output pin, one end of the speaker
PC724Digital tube connection

2.3.3 Function Introduction:

Press and hold the PI1 key, then power on, enter the learning pairing mode, and exit the pairing mode after 15 seconds of successful pairing or no action;
After successfully pairing with the host, when receiving the corresponding pairing code, start responding to flashing lights, vibration and voice prompts; Flashing light: flashing three times a second, which lasts all the time;
Vibration: respond three times, once every 0.5 seconds;
Voice prompt: For example, the voice content is “Dear XX customer, your meal is ready, please pick it up at the exit, and have a nice meal”. After playing the voice prompt, play a piece of background music, and then repeat the content after the background music is over. The above response actions continue until no signal is received.
Press the PI1 key, and you can choose the reminding mode: a, flashing light+vibration; B, flashing light+voice; C, flashing light+voice+vibration
The digital tube displays the xxxx number of the content. If it has been paired successfully, it will display the number of the corresponding host. If it has not been paired successfully, it will only display 0000.

#3 Application Frame Diagram

Application Frame Diagram
Application Frame Diagram

#4 WT588F02B Basic Functions and Features

  1. 16-bit DSP voice chip, 32Mhz internal oscillation;
  2. The working voltage is 2.0 ~ 5.5 V;
  3. 16-bit PWM/DAC output can directly drive 8R 0.5W speakers;
  4. Support WAV files of 6K~32Khz;
  5. Customers can replace the internal voice content of the chip online through the supporting download test board;
  6. Support 32768-segment address, which can be expanded with more requirements.
  7. There is 183K byte storage space inside the chip (excluding the main control program)
  8. Low voltage detection function
  9. Support 32-paragraph display
  10. With wireless code receiving function, there is code checking mode, and the learned code can be memorized after power failure.

Standard scheme:

With the standard EV1527 communication protocol and the existing standard functions, the customer provides the text for broadcasting voice and the desired background music, and the voice file is made by Waytronic.

Customization scheme:

Customers provide customized wireless communication protocols and customized logic functions, which are evaluated by engineers of Waytronic Companion. If feasible, Waytronic Companion writes programs to realize it.
At present, there are three packages of this IC: SOP8, SOP16 and SSOP24. It has many expanded uses. If you want to know about them, please contact Waytronic.

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