How it works for receiving online food orders
1. The customer places the order either via Mobile APP or website.
2. The web server generates the order, and sends to the printer via Wifi, 4G, 3G, GPRS or SMS.
3. The terminal receives the order, and prints it out.
4. The user can accept the order selecting the expected delivery time (e.g. 15 mins), or reject the order.
5. The terminal sends the callback to the web server and customer.
