PhoneLocator

Breadboard (generic)

Arduino Web Editor

Jumper wires (generic)

Arduino Yun

Pushbutton switch 12mm

Blynk

Resistor 221 ohm

<h3 >Overview</h3>Have you ever forgot your phone in your friend's house? Are you afraid of an unpleasant person taking your phone? I am sure that everyone was confronted with loosing or forgetting their phone. PhoneLocator aims to locate your phone (hint in the name) and send you its geolocation coordinates via email so you can recover your precious device. Thanks to Blynk, all you have to do is press a button. Note that you will need a Blynk account to operate this project, a guide to creating an account is placed under constructing the project below.<div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/c641715c-c178-4ac5-b8ee-528cf5c08a4b.JPG /><figcaption>Just add a button</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/a2a84ba2-b286-44bc-bbd6-4dfb8c3bee32.png /><figcaption>Instant responce</figcaption></div><h3 >Functionality</h3>The project works really simply, whenever the user presses a button, The Arduino Yún will read the phone's geolocation and send the client an email. And to make the project more professional, you can think that the email is sent to you from the Blynk app on your phone, smart robber. Here is an image illustrating the project.<figure><img src=https://projects.arduinocontent.cc/2e716877-b435-428e-b255-61ceadce5ef3.png /><figcaption>Functionality Overview</figcaption></figure>This image illustrates the project's code overview.<figure><img src=https://projects.arduinocontent.cc/e2a330bd-d8b5-41ba-8987-505b8fa5e091.png /><figcaption>Code Overview</figcaption></figure><ul ><li >if(button is pressed) will check if the button connected to pin 2 is pressed</li></ul><ul ><li >getLocation will request the phone's location from Blynk</li></ul><ul ><li >Process Data will process the received co-ordinates into the body of the email</li></ul><ul ><li >Send email will send the email to the user</li></ul>A response from the Arduino will be received in about 8 seconds from the press of the button if the phone is located. Note that this project can work if the phone is sleeping or on once the Blynk app is allowed to run in the background (even if the app is closed). The user must ensure that the Blynk project on the phone is on, for more details, see constructing the project.<h3 >Benefits</h3>The user operating this project will benefit in: <ul ><li >Locating their phone if it is lost or stolen</li></ul><ul ><li >Ease of use</li></ul><h3 >Constructing the Project</h3>Step 1: Required Apparatus There are a few things needed in this project.<ul ><li >Jumper Wires</li></ul><ul ><li >1, <a href="https://store.arduino.cc/arduino-yun">Arduino Yún</a></li></ul><ul ><li >1, Button</li></ul><ul ><li >1, Breadboard</li></ul><ul ><li >1, Resistor (220Ω)</li></ul><ul ><li >1, Smart Phone</li></ul><div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/bb6e89d7-b60e-4e1f-ba61-8a434365a0fd.JPG /><figcaption>All the Components</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/3b1ac0ef-b9f2-4749-bfbe-63224d45c334.JPG /><figcaption>Main Components</figcaption></div>Step 2: Connecting the CircuitA simple project needs simple schematics, here is an image displaying the project's circuit.<figure><img src=https://projects.arduinocontent.cc/e037d958-7020-4311-a56c-99e6695b61b0.png /><figcaption>The Schematics</figcaption></figure>Step 3: Acknowledging the CodeThere are three parts to this project's code, each one is simple.<ul ><li >getLocation</li></ul><ul ><li >Process Location Data</li></ul><ul ><li >Send Email</li></ul>Here is an indent look at each of the functions.<ul ><li >getLocation</li></ul><pre ><code >BLYNK_WRITE(V0) // read virtual pin 0 for co-ordinates { latitude = param[0].asDouble(); longitude = param[1].asDouble(); altitude = param[2].asDouble(); speed = param[3].asDouble(); } </code></pre>Blynk stores variables in Virtual pins, the function BLYNK_WRITE(V0) will read virtual pin 0 and store the values in separate variables, latitude and longitude will be used in this project. Ensure that the Blynk project is set up correctly before uploading the code. See below for instructions.<ul ><li >Process Location Data</li></ul><pre ><code >if(latitude != 0.00 &amp;&amp; longitude != 0.00) // if co-ordinates are valid { //String toSend is the string that will be sent as the emails body String toSend = &#34;Phone Located! \ received co-ordinates \ LAT &#34;; toSend += latitude; // add vaiables to string toSend += &#34; LNG &#34;; toSend += longitude; toSend += &#34;. View location on Maps: &#34;; toSend += &#34;www.google.com/maps/?q=&#34;; toSend += latitude; toSend += &#34;,&#34;; toSend += longitude; delay(500); } </code></pre>The email can only be sent as a string, so its body must be a string. This section of code will run if the received co-ordinates are reliable. Multiple items are added to the string, including Latitude and Longitude of phone and a Google Maps link to view the location on a map.The Arduino will always check if the received co-ordinates are existent (not 0) before sending the email, the Arduino will continue requesting the phone's location until a valid one is received, the Arduino will loop this function up to 10 times.<ul ><li >Send Email</li></ul><pre ><code >Blynk.email(userEmail, &#34;PhoneLocator | Notification&#34;, toSend); // send email if(proDebug == 1) { Serial.println(&#34;Success&#34;); Serial.println(&#34;Email Sent&#34;); Serial.println(&#34;Restarting Protocol&#34;); Serial.println(&#34;&#34;); } </code></pre>This is the function where the Arduino will send the email, the Arduino will send the string as the body of the email. ProDebug is a debugging tool that must be set to 0 in the project to enable the project to work without the Serial Monitor. The default setup is 1, which requires the Serial Monitor to be open for the project to work.Setting up the VariablesEnsure that all the variables marked TODO are edited. These include your email, your Blynk auth token and proDebug. You will be guided on receiving your Blynk auth token further down.LibrariesBridge - Arduino LLC this library is in the public domainBlynk - Blynk this library is released under The <a href="https://github.com/blynkkk/blynk-library/blob/master/LICENSE">MIT License (MIT)</a> Blynk Setup<ul ><li >Step 1: Download Blynk</li></ul>Blynk is a simple app that helps you create IOT products simply and easily, to get started with, download Blynk for <a href="https://itunes.apple.com/us/app/blynk-iot-for-arduino-esp32/id808760481?mt=8">IOS</a> or <a href="https://play.google.com/store/apps/details?id=cc.blynk&hl=en">Android</a>.<ul ><li >Step 2: Create your Blynk Account</li></ul>Fallow the images below and their data to set up your Blynk account.<div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/2bca2f34-30e1-492d-9a07-0f6cc7fac3dd.png /><figcaption>Open the Blynk App</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/9438d871-c903-43c3-ba12-f85c516ce896.png /><figcaption>Create a new account by inserting email and a password, it's free</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/db9a1c4e-b4c3-4cab-bf25-7bd56d63f378.png /><figcaption>Click Go to create your account</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/0b95d734-c6ad-4654-be3f-313e6e22e335.png /><figcaption>For this project to work, you must select "Always Allow" when this window pops up</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/6d18bd28-46da-48ae-b94f-c6f3ef1622f9.png /><figcaption>Slide to the right and click New Project</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/2731a8c9-b9e5-4cfb-9cb4-9e3954bdcb0a.png /><figcaption>A window like this should pop up, configure the settings as illustrated in the image</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/e604ba10-82a8-4aab-ac88-c0be2fadf6eb.png /><figcaption>After you clicked Create Project you should see a window like this</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/4af24af4-1da5-4d18-94d6-c74aa76c4b87.png /><figcaption>Click on the settings button in the top right corner, now, click the email button to receive your auth token</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/fb7c9a0a-e12b-4726-915b-8b464c32e34e.png /><figcaption>Exit the window and slide to the right, top right of the screen</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/8df79fff-f02d-475a-abf6-a1ec7258a76f.png /><figcaption>click on the GPS widget, in the settings panel, configure OUTPUT to V0</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/635dd99d-bb60-4cb5-94f0-8f9915ceafbc.png /><figcaption>click on the Email widget and insert your email</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/f9b2ee61-b794-4d4b-91da-4467c929d65f.png /><figcaption>Click on the play button in the top right corner of the page, and you are done</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/76d29320-e918-40a6-9702-aa22d626f0f9.JPG /><figcaption>Click Allow</figcaption></div>SetupThe final step is to change the TODO variables, if not done already. The auth variable must be set to the Auth token received by email in the previous step. Make sure that all the TODO marked variables are correct. Connect your Arduino Yún to your Mac/PC and upload the code.<figure><img src=https://projects.arduinocontent.cc/ebff228d-a052-4232-a13d-1a1b55f62912.JPG /><figcaption>PhoneLocator</figcaption></figure><h3 >Background</h3>I created this project as I was thinking of an easy solution to finding a lost phone. Blynk allows the user's Arduino Yun to receive geolocation even if the App is only working in the background and the phone is sleeping. By the click of a button, a lost phone can be located. Tested on iPhone (IOS11).

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Image

PhoneLocator

Simply click a button to receive your phone's geolocation.