Design and construction of a token vending machine for wireless internet connection

This paper presents the design and construction of a machine that automates the process of selling access credentials to a wireless network. For its construction, the V methodology for project management was followed. The machine consists of a closed box with two buttons on the outside to indicate the start and end of the transaction, a 16x2 LCD screen with an I2c conversion interface to show transaction, user and password indications, a multi-currency purse and four LED lights that serve as indicators of the amount entered. Internally the machine consists of an ESP-8266-E development board, an Mb102 breadboard source module, a 12V 2.5A eliminator, a 5.0 V universal charger cube and a breadboard. Logically, the web-based spreadsheet (Google sheets), Google apps script and the Arduino integrated development environment were used. The result is a low-cost prototype, which provides controlled internet access credentials for multiple users.