Setting up OTG communication with MIT app inventor

Today I'm Going to go over how to set up serial communication between a Arduino and a smart phone using a OTG cable and MIT app inventor. I'm using an Arduino mega for this project and a old phone I had lying around. If you are powering anything with the Arduino I suggest to power the Arduino with a second power supply, just so you don't drain your battery.
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[@kevalnakar6269]

I liked and subscribed before watching the video because it's only video that describes mit or kodular app with OTG support. Thank you so much sir.

[@epartsacc]

Cool ending music!

[@zikermu]

Great .Thanks a lot

[@antonioarenas4473]

thanks a lot!! it works perfectly, thanks from Mexico

[@antonioarenas4473]

could you make one where you use serial communication to play a game??

[@robotech2566]

OTG communication is much effective than wifi or bluetooth

[@claudiojambo]

Excellent! Can you share the code?

[@MichelangeloRossini]

I don't see you set serial at 9600 in AI blocks. Why?

[@nadeeshpeiris7496]

Thank you very much for this video. unfortunately its not getting connected when call OpenSerial in my case, but ArduinoDroid samples are working fine. Could you please tell me what should I have to do troubleshoot this? Thanks :)

[@nadeeshpeiris7496]

Okay, I think it is because of it doesn't show me the dialog box to "allow permission" when I click the "connect" button

[@viktorashistan7207]

@@nadeeshpeiris7496 me neither, have you found a fix?

[@lifeai1889]

cuz ur arduino have ch340g serial chip

[@muhammadfirman8159]

Can u share code?

[@anishrathodscience119]

hey I am trying to get this app to work but it just won't connect to my Arduino. There aren't any errors. It's just that when I click connect, it won't connect

[@VinithMC]

Hey did u ever find a fix to this issue? Currently dealing with this right now

[@anishrathodscience119]

@@VinithMC I'm very sorry, but I have not found a fix to this issue

[@MrIgor269]

У меня такая же проблема. Может нужно изменить настройки для USB в телефоне (или планшете)?

[@anishrathodscience119]

@@MrIgor269 Maybe but I don't think that'll fix it.

[@MrIgor269]

@@anishrathodscience119 Я уже разобрался. Оказывается в моем телефоне не был включен USB Host! Я зашел в системные файлы Android и дописал пару строчек, чтобы включить USB Host - в итоге у меня на Android 4.0.4 - все заработало!!!

[@savkegt500]

Hi. I have tried this but no sucess. I got "Error 3901: Serial was not initialized". Tried with two phones same. I have tried app ArduinoDroid to flash my board Arduino Uno and it works so cables are ok. Can you give me some idea what can be? Thanks

[@TabletopRobotics]

that error usually occurs when you try to open serial communication before initializing. make sure you have [call serial1 .initializeSerial] then [call serial1 openSerial].

[@savkegt500]

@@TabletopRobotics thans for replay. I get error immediately as i start application, not even click on conect. And it keep pop up every second

[@TabletopRobotics]

then there's a problem with your timer. try moving [set global number to call serial1 .readSerial] so its right below the [set checkbox1 .checked to true]

[@savkegt500]

@@TabletopRobotics that solved error problem, but still no connection, i don't get this promt to allow usb permission when i click conect. Tried via ArduinoDroid to send serial data (two numbers) and i get back sum via serial

[@TabletopRobotics]

I dont really know why. its hard to troubleshoot a problem when its not right in front of me, but i know some phones don't support usb host mode, what version of android are you using?

[@germanskena6537]

HI. I get this message and i cannot see the video. (An error occurred. Please try again later. .... and a playback Id.).

[@TabletopRobotics]

Are you getting this error with only my video?

[@germanskena6537]

@@TabletopRobotics yes.

[@TabletopRobotics]

I trying to look into it. But a quick google search says youtube is having some technical problems today so there might not be anything I can do. Sorry. But I'll try my best.

[@germanskena6537]

@@TabletopRobotics . Thanks for the speed replay to me. Now is working!. I will see it right now. Is strange. I have no problem watching the video from my tv but, i have the problem with linux and windows. :/ (by the way, My tv have Android tv). ..... Strange things from youtube. Again. Thanks.

[@TabletopRobotics]

Glad to hear it :)