I have made an Arduino based night lamp using photo resistor and problem with that is light levels was different from place to place, when I am testing I have used a value as a threshold to switch on the light and after fixing it in its final position that value is way off. So, to get the correct value I have to data log the photo resistor reading after fixing the light in place, which was a bit harder, because I cannot leave my laptop outside for data logging for a whole day. So I need a portable solution to my problem. Another project was, water supply near my place was limited, we get water only at fixed timings. So I made a device to turn on water motor at a fixed timings of day.

I haven’t made any user interface for that device to change timings because timings get to change very infrequently. So I need a way to change timings without connecting laptop and recompiling Arduino code, that would be complicated for my parents. So I decided to make an android app that would send serial data to Arduino to change timings of water motor. In this instructable, I will explain how to create an android app that can communicate with Arduino by USB OTG cable, If you dont care about how to just download.apk file and install it in your phone to communicate with arduino. In the welcome screen you should see configure button, by selecting it you should go to configuration page. There first option would be “SDK Manager”, by clicking that a new window will open by showing the details of current SDK. There would be an option to “launch standalone SDK Manager“, by clicking that good old SDK manager will be opened there you can add new SDK tool as required.

Thanks, it is working for me. I used, Arduino UNO with Arduino 1.0.5 Sparkfun USB Host Shield (for this application no need to connect RST to D7).

Android studio has an emulator to test the android code, but unfortunately we cannot use that for this scenario because this involves a physical device talking to another device. Instead we can use an android phone itself to debug the code. Since we are using android device to debug the code we can just download “SDK Platform” of that specific version of the device, first know the android OS version of the phone. Manual Do Modem Sagemcom F St 2764 Eprom. In my case I am using Samsung note3 which has 5.0 (lollipop) so just download “SDK Platform” from “Android 5.0.1 (API 21)” that should be enough. Step 4: About the Library. First I want to make an app that looks same as Arduino's serial monitor window.

In the welcome screen of android studio there will be an option to create new project, select “Start a new android studio project” In the next page give your project name and location, then click next In the next page select the platform for which we are developing application and select correct version of your phone and click next In the next page by default “Blank activity” will be selected and leave it as it is for now. And in the next page name your activity (your main screen in the app). Then click finish, newly created project will be opened in android studio and we can work on it now Step 6: Adding Library to New Project. In the top left side of the main screen there will be a drop down menu ladled as android, change the option to project to see the directory structure of the project.

In the directory structure by expanding “app” folder you can find lib folder that is the default folder to place our libraries. Copy the physicaloidlibrary.jar file and paste it in libs folder After pasting click “sync project with gradle files” button on the top. Now the library is added we can use its features in our code. Main activity that was automatically created when we first created project will be located in App >src >main >java >YOUR_ACTIVITY And layout will be located at App >src >main >res >layout >activity_serial_monitor.xml Step 7: Editing Manifest.xml. Manifest file is like main properties file for our project, It contains permissions details and activity details Manifest file is located in App >src >main >AndroidManifest.xml Open the file and add Line above my manifest file looks like By adding that line we are asking permission of the user every time we connect a USB device to OTG port Step 8: Designing Layout. Editing should be done in “content_serial_monitor.xml” file I have dragged 3 buttons, 1 edit text, 1 text view on to screen then renamed and placed them in correct order.