Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Pin numbers correspond directly to the esp8266 GPIO pin numbers. To read GPIO2, call digitalRead (2); GPIO0-GPIO15 can be INPUT, OUTPUT, INPUT_PULLUP, and INPUT_PULLDOWN. GPIO16 can be INPUT, OUTPUT ...

Project Description This system integrates an Arduino Uno with an ESP8266 WiFi module to create a responsive home automation controller. It supports up to four relay-connected devices, allowing users ...

Setup is fairly simple with downloads for Linux, OS X, and Windows. This isn’t an ESP8266 shield, either: you can write code for the ESP module, connect the serial pins, and hit the program button.

EEPROM Issues The ESP8266 doesn’t have a true EEPROM. But the Arduino software emulates it with flash. When you want to use the EEPROM you have to inform the library how much memory you will use.

Expansions Arduino UNO headers with Pins 14x digital I/Os 13x LED pins Analog – 6x analog input pin, 2x 12-bit analog DAC 6x PWM 1x UART, 1x I2C, 1x SPI CAN Bus support I/O Voltage – 5V and 3.3V (Not ...