ABSTRACT
This chapter discusses the development of a customized board with 8051 and NuttyFi for Internet of things (IoT) applications. The customized board comprises of 89S51 microcontroller, reset circuitry, crystal circuitry with 11.0592MHz frequency crystal, ADC 0804, MUX 74HC4051, and NuttyFi board/ESP8266. ADC 0804 is a chip designed to convert analog signal into 8-bit digital data. The 74HC4051, 74HCT4051 is a single-pole octal-throw analog switch (SP8T) suitable for use in analog or digital 8:1 multiplexer/de-multiplexer applications. NUTTYFI is an IoT hardware platform based on ESP8266 12e series that enables user to build IoT products, research analysis systems, automation, and projects. A crystal oscillator is an electronic oscillator circuit, which is used for the mechanical resonance of a vibrating crystal of piezoelectric material. Quartz crystal is the most common type of piezoelectric resonator.
