IOT: Control 4 LED dan 8 Channel Relay Module dengan ESP8266 NodeMcu via Local Wifi Router Pada tutorial Project ini kita akan mengendalikan LED dan / atau Relay module melalui jaringan Wifi Router menggunakan ESP8266 Nodemcu-4M.
ESP8266 is a very popular device for IoT these days. ESP8266 is easily available as a module. Its a small and dirt cheap device which has a inbuilt controller running at 80Mhz and with optional firmware it can be used as a stand alone device without a microcontroller like arduino.
Video of working project and overview of making process -
This project is very simple and uses an ESP8266 module ESP-01. It has pinout headers which provides very easy connectivity with other devices. A 5V 2A AC power supply, a voltage regulator and optoisolated 2 relays board is used. A CP2102 USB-UART is used to program and configure the ESP module. The module is loaded with NodeMCU firmware which support Arduino like functions for GPIO and lua scripting support.
Part List
LM2596 DC to DC 3A Step Down Module with Voltage Display - or any other step down voltage regulator to convert 5V to 3.3V for ESP module. Even a cheap IC like LM317 or LM1117 will do.
CP2102 USB UART module - or any other 3.3V compatible USB-TTL UART adaptor