Background
What to make
Things in Use
Steps
Step1
Step2
Step3
Step4
Step5
What is obniz
Spec and Components of obniz board 1Y

Published December 19, 2019

Power-Saving Door Open/Close Detection: Linking Slack

Let's detect door open/close while using sleep mode function of the board!

BeginnerFull instructions provided787

Power-Saving Door Open/Close Detection: Linking Slack

Things used in this project

Hardware components

Cambrian Robotics obniz Board 1Y

magnetic switch

obniz Grove connector

Software apps and online services

Slack

Story

Background

A new board, obniz board 1Y, has "sleep mode function". I think you have already heard about sleep mode function. Yes, it's making devices working only when in use. Devices don't operate when it's not being used so you can save power and use it for longer time.

Thanks to this sleep mode function, you can operate the board for "1 YEAR" with AA batteries and do your development project anywhere, even at the place without power outlet.

This time, let's make use of this sleep mode fucntion of obniz board 1Y and detect door open/close using magnetic switch!

What to make

When door open/close is detected by magentic swtich, obniz board 1Y wakes from sleep and sends message to Slack. Then, it turns back to sleep mode again!

Things in Use

Steps

Step1

Connect obniz Board 1Y with magnetic switch as below.

This time, we can connect the board to magentic wsitch using obniz Grove connector!

[Reference: If you do not use Grove connector] obniz parts library (CT10)

Step2

Let's arrange setting to send messages to slack → https://api.slack.com/apps

(Please prepare slack account previously)

2-1 Slack API

Click "Create New App" on [Your Apps] on Slack API screen.

2-2 Create a Slack App

App name: As you want (here, we use "obniz_event")

Development Slack Workspace: Workspace you want to send messages

When you finish creating App, the screen would be as below. You can set up the app on your own, this time please click "Incoming Webhooks"

2-3 Setting Webhooks

Let's move to [Incoming Webhooks] and turn on "Activate Incoming Webhooks"

Scroll down and Click "Add New Webhook to Workspace"

2-4 Setting Channel

Choose where to send messages. You can send messages to private or group channels.

2-5 Copy Webhook URL

Copy the URL and use it when coding.

Step3

Move to obniz developer console and register the device. [devices] - [add devices] - [Use obniz official devices]

Step4

Because we use serverless event, save program on repository. [repository] - [New]

Please, set up as below and click the blue button "create"

Type : WebApp
Access : Private
File Name : As you want（here, "sleep_sw"）

You can change the screen in English as well, so don't worry!

And write the code! The source is attached below!

Step5

Click [Serverless Event] - [Create] on obniz Console!

Title :　As you want（Here, "SleepSwEvent"）
WebApp : Code Title you saved
Activation (きっかけ) : obniz Hardware Event
obniz : obniz ID
Event : online

Now everything is prepared!

What is obniz?

obniz Is a cloud-connected IoT development board. Start DIY electronics with obniz! You can control devices and robots via cloud and do AI projects very easily with obniz. You can connect to Wi-Fi just by scanning QR code on the screen and start programming on the web browser of your smartphone or computer with any language you prefer. obniz supports whatever you want, from simple DIY electronics to advanced IoT projects. Let’s try!

Spec and Components of obniz board 1Y

A new board, obniz board 1Y, has been on sale from 17th Dec. Let's check the powerful board with sleep mode function and additional power pins at the official store!

Untitled file

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Sleep機能を使ったスイッチ</title>
    <script src="https://unpkg.com/obniz@3.0.0/obniz.js" crossorigin="anonymous"></script>
  </head>
  <body>
    <script>
      //-----------------------------
      // slack setting
      //-----------------------------
      let slack_url = "YOUR Slack Webhooks";

      //Timeout 25s
      let tid = setTimeout(()=>{
        //HIGH -> LOW 立ちさがりを検知するまでスリープ
        obniz.sleepIoTrigger(false);
      },25000);

      //-----------------------------
      // obniz setting
      //-----------------------------
      let obniz = new Obniz("OBNIZ_ID_HERE");
      obniz.onconnect = async () => {
        //slack post
        await fetch(slack_url, {
          method: 'POST',
          mode: "no-cors",
          headers:{'Content-Type': 'application/json'},
          body: JSON.stringify( {"text":"obniz Push SW!"})
        }).then(()=>console.log("success")).catch((error) => console.log(error));

        //HIGH -> LOW 立ちさがりを検知するまでスリープ
        obniz.sleepIoTrigger(false);
        //program finish wait...
        await obniz.wait(1000);

        clearTimeout(tid);
        if(typeof done === "function"){
          done();
        }
      }
    </script>
  </body>
</html>