LinkNode R1: Arduino-compatible WiFi relay controller

Introduction

LinkNode R1 is a WiFi development board which is powered by the high integrated WiFi chip ESP-8266EX.

Thanks for the contribution from open source community who have developed Arduino core for ESP8266, this let Aduino IDE program LinkNode R1 without any change. At the same time, LinkNode R1 has Arduino-compatible pin out which make it very easy to connect to Arduino Sensors.

Features

• Powered by ESP-8266EX
• 6 Digital I/O pins
• 1 Analog Input pin
• 1 Digital I/O for Relay
• 1 DC port for power/configure
• Power jack for 5V power input
• Compatible with Arduino programming
• Compatible with NodeMCU
• OTA -- Wireless Upload(Program)

Tutorials

1. Get started in Arduino

If you have used Arduino before, you will feel that the LinkNode R1 is as same as Arduino, and there is no difference between their programming. The only limitation of LinkNode R1 is that it only has 6 digital ports and 1 analog input port.

a. Requirements

• Arduino IDE, (the latest version is 1.8.2 )
• The Arduino core for LinkNode D1

b. Install hardware package for LinkNode R1

• Install Arduino 1.6.8 from the Arduino website.
• Start Arduino and go to File --> Preferences .
• Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.

• Open Boards Manager from Tools --> Board menu --> Boards Manager.
• Search and install esp8266 platform (and don't forget to select your ESP8266 board from Tools --> Board menu after installation).

c. Check the configuration of Board

Because the LinkNode R1 has not been added into the offcial ESP8266 Arduino core repository yet, so you can't find LinkNode R1 board on the boards list, but you can use the WeMos D1(Retired), this board is fully compotiable with LinkNode R1.

d. Create a Arduino Project

• Connect LinkNode R1 with a USB to TTL board to your PC
• Check your serial port which your PC recognize
• Enter the following source code and click the Upload button
• Chose the Upload way and then uoloaded selecte Run way

const int Relay = 16;

void setup() 
{
	// initialize digital pin GPIO2/D9 as an output.
	pinMode(Relay, OUTPUT);
}

// the loop function runs over and over again forever
void loop() 
{
	digitalWrite(Relay, HIGH);   // turn the LED on (HIGH is the voltage level)
	delay(1000);              // wait for a second
	digitalWrite(Relay, LOW);    // turn the LED off by making the voltage LOW
	delay(1000);              // wait for a second
}