Introduction: How to Use Android APP to Control LinkNode R4

LinkNode R4 is a WiFi relay controller and it is powered by ESP-12f ESP8266 WiFi module which is comptiable with Arduino programming. There are 4 relay channels and each channel allows you to control high-power devices (up to 10 A) via the on-board relay. LinkNode R4 can be used to remotely turn lights, fans and other devices on/off. The WiFi interface will allow you to associate the board with your existing WiFi network and send the commands over the network.

Step 1: 1. Install Android APP

Download the APK file from the attachment

Step 2: 2. Login LinkSpriteIO

If you never register an account on LinkSpriteIO, please enter Email and your password, then click the SIGN IN buttonIf you have an account on LinkSpriteIO, please enter Email and your password, then click the REGISTER button

Step 3: 3. Go to Relay Device List

Click the plus icon on the upper right quarter to add a new LinkNode R4.

Step 4: ​4. Scan the QRcode

Get the device information and register it to your account.

Step 5: ​5. Configure to Accece WiFi AP

Supply the power for LinkNodeR4, the LinkNode R4 will create a AP called LinkNodeAPUse your mobile phone to connect this APOpen a browser and enter the ip address and you will see the following website, see the picture

Click the button configure WiFiSelect your WiFi AP which you want to connect and enter your wifi password.If connecting failed, you can go to the same website to configure it again.After that, LinkNode R4 will connect to Linksprite IO via the internet.

Step 6: ​6. Control Your 4-channel Relay

Control the button on the right side to turn on or off the relays, and you can click the relay’s name to change it.

Step 7: