In the present automation system i am going to show a similar system where one can order the menu from table itself. With this system you no need to wait for the server to take the order. A tab is provided with menu instead of a paper menu. Let us see the circuit and components used for this project
Circuit
Transmitter:
Receiver:
Transmitter system is placed at the customer table while the receiver section is present in the kitchen.
Required Components:
Components Explnation:
Atmega8 Microcontroller:
It is an 8 bit controller. In this project peripherals like UART, EEPROM are used. EEprom to store the menu and UART to communicate.
LCD:
A 16*2 LCD is used here. It is used in 4 bit mode to reduce the usage of number of pins in the controller.
Touch Panel:
It can be used instead of a keypad. There are two types of touch pads resistive and capacitive. A capacitive touch pad is most commonly used.
Circuit Explanation
For every microcontroller there are some necessary connections like clock and reset circuit, power supply. Avr has internal clock, so there is no need of connecting clock externally. There are two sections present in automation system.
Transmitter:
Receiver:
Working
Menu is stored in the eeprom of the AVR microcontroller.AVR has 512 bytes of eeprom internally. This is displayed on the LCD .Here LCD is used in 4bit mode to reduce number of pins usage. Data from EEPROM is fetched by the micro controller and is displayed on the LCD. By using the key pad one should select the menu. Suppose 1.Soup 2.Starters 3.Main course is displayed, the user should press 1 from keypad and select the item again and press #. Thus the order is transferred to the receiver through zigbee. ZIGBEE is high level communication protocol using small, low-power digital radios.
Advantages
This system makes the customer happy as it helps in ordering the as soon as he arrives at table without waiting for sever to take the order. This is very helpful for owner as it reduces the man power and menu can easily changed if there is any raise in price.
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