Serial usb connection

[Stephanie_Leblanc]

Hi there! This is exactly what I’m trying to do as well. Just transmit serial data from the app to the arduino. I used the serial component, but I don’t see how its possible or how to best include the serial1.open block. Could you share how u set up ur blocks in AI2 ? Thanks alot.

(Sketched are helpful as well!)

Thank you Again

[blake]

Stephanie, see this thread for actual example code of using the serial blocks to send/receive:

Serial - Can I Use Serial Component to Read from a USB Device?

Hi, I have a USB device that outputs text messages. I connected it to Android phone using OTG adapter. Now, in my AI2 app, I'd like to connect to the device, read from it, and display received data (text). I have this code: [image] When executed, the code fails on call to OpenSerial: [image] Any ideas how to fix this? I know that the device works fine. (I can plug in into a USB port on a laptop and read data from it using python.) Also, the Android phone I am using does support OTG. …

@Mat_RacingMat

same here: the serial extension works fine with arduino MEGA 2560 (RX and TX)
but not with Arduino UNO nor Teensy LC

I did all my testing with an UNO and everything was fine. My understanding is that serial ports operate identically on those three platforms (I've interchanged working code between those three exact devices many times).

It might also be a phone specific issue. With my testing, I was using a Moto G Play XT1609 running Android 7.1.1.

Blake

[Juan_Antonio]

@Stephanie_Leblanc

serial component

Try with this extension

Using serial with FTDI

One problem with the built in serial component is that it does not include d2xx.jar needed for communication with FTDI usb to serial converter. If you connect this device you get an error “Java Lang.NoClassDefFoundError: Failed resolution of Lcom/ftdi/j2xx/D2xxManager”. I guess this is from the PhysicaloidLibrary. It is the same problem with the com.pavitra.5.aix that make use of the PhysicaloidLibrary. If this is solved, then some of the Arduino clones can be used with App Inventor. A better …

[TApps_AppsToAll]

Can someone upgrade this?

[Patryk_F]

Use this extension. Works perfectly.

Using serial with FTDI

One problem with the built in serial component is that it does not include d2xx.jar needed for communication with FTDI usb to serial converter. If you connect this device you get an error “Java Lang.NoClassDefFoundError: Failed resolution of Lcom/ftdi/j2xx/D2xxManager”. I guess this is from the PhysicaloidLibrary. It is the same problem with the com.pavitra.5.aix that make use of the PhysicaloidLibrary. If this is solved, then some of the Arduino clones can be used with App Inventor. A better …

[Juan_Antonio]

Here examples of the SerialOTG extension

Serial OTG. Arduino CH340. FTDI. rkl099's Extension

Hello friends, I am going to comment on my experience with the great extension of the user @rkl099, which you can find in this topic: With this extension we can connect a mobile phone (or tablet) to the Arduino with a CH340 chip by cable. It has been tested with CdcAcm, PL2303, PL2303HX, FTDI, CP210x, CH341, CH341 (“fake”) and CH340. Get com.SerialOTG.aix: To carry out these examples I will use a mobile with Android 9, OTG cable, USB cable and an Arduino UNO with CH340. [otg17] …

[TApps_AppsToAll]

Where can I find the aix file?
Thanks

[Taifun]

@TApps_AppsToAll

Where can I find the aix file?

here

Using serial with FTDI

Here is the link: https://github.com/rkl099/AppInventor-SerialOTG

Taifun