Published December 6, 2019

Move a Flag When You Receive a Comment on Twitter!

The flag moves when #keyword is tweeted. It's easy to link Twitter and obniz board.

BeginnerFull instructions provided482

Things used in this project

Hardware components

Cambrian Robotics obniz

Servo Motor

Power Supply

Software apps and online services

Twitter

Story

Don't you want to get notified in reality when you are tagged? The flag moves when someone tweets #obniz. You can change the hashtag to a keyword you like and move the flag when you are tweeted with your own keyword.

Step 1: Setting Up obniz

To set up obniz, all you need to do is to follow three steps.

Connect obniz to WiFi.
Connect devices like LED or motors to obniz.
Scan QR code of obniz and start programming. You do not need to install any software.

Step 2: Connect obniz to Servo Motor

Connect obniz and a servo motor as below.

Step 3: Make a Flag

You can make your own flag and attach it to the servo motor.

Step 4: Program

Write the program in the code section and run! If you wan to change the keyword, you can change #obniz to yours.

Step 5: Let's Try!

What is obniz?

obniz is a cloud-connected IoT development board. You can program on the web browser of any smartphone or computer and the command is sent to obniz through the internet via obniz cloud. By connecting the obniz to the cloud through wifi, users can remotely control devices that are physically connected to obniz.

obniz has 12 IO and WiFi-BLE module. It can be controlled through the APIs – REST or WebSocket API – on obniz cloud. Not only simple IO on/off but also UART, I2C, BLE etc can be used by remotely controlling obniz via internet. All you need to do to connect obniz is to input unique ID by scanning QR code. Complicated processes are done by obniz and its cloud. You can just start programming in HTML, browser and circuit have already been integrated. If you write a program to collect sensor values, you can make a chart of the values easily.

For more information, please visit our website! https://obniz.io/

You can buy obniz board on Amazon too! https://www.amazon.com/obniz-IoT-Gateway-circuit-Web/dp/B07DD6FK8G

You can find a variety of projects made with obniz board! https://blog.obniz.io/example/

program.txt

// Nodejs

var Obniz = require('obniz');
var Twitter = require('twitter');

var obniz = new Obniz("0000-0000");
 
obniz.onconnect = function(){
  var servo = obniz.wired("ServoMotor", {signal:0,vcc:1, gnd:2});
  servo.angle(10);
}
 
var client = new Twitter({
  consumer_key: '<ConsumerKey>',
  consumer_secret: '<Secret>',
  access_token_key: '<TokenKey>',
  access_token_secret: '<TokenSecret>'
});
 
var stream = client.stream('statuses/filter', {track: '#obniz'});
stream.on('data', function(event) {
  if (event) {
    var count = 0;
    var angles = [10,50,10,50,10,50,10]
    var timer = setInterval(function(){
      count++;
      servo.angle(angles[count]);
      if (count >= 6){
        clearInterval(timer);
      }
    }, 1000);
  }
});