Jul 29, 2016 CH340 chipset is one of the multiples USB to serial converters made to add compatibility between PC with USB ports and old serial peripherals. It is not based in any particular protocol so it would be possible to implement different serial protocols using it. Example of using jSSC - communication between JavaFX and Arduino via USB/Serial - Duration: 0:50. Andr.oid Eric 9,066 views.
In this article, I present an example showing how to connect an Arduino device to your PC using USB serial and Java.USB serial is available on nearly all Arduino based boards. Further, there are serial interface Java libraries thatcan connect to an Arduino.
If you are unfamiliar with data communications in general, take a look a theintroduction to data communications article; although itdoes not cover serial communication, it is still a good starting point for the unfamiliar.
For an out the box complete solution checkout our new BETA library tcMenu library for Arduino including remote control.TcMenu not only provides a full menu system with designer, but also remote control from Arduino to Java using RS232 or Ethernet.
This will require that you have the following components to hand:
- Arduino device with breadboard and jumper wire
- 20x4 LCD display
- some microswitches & 4k7 resistors
- USB Connection to a computer (serial over USB)
- Java version 8 on the PC / Mac
- The>
Setting up the arduino sketch to run
Once everything is wired up, you will need to enter the pins used for the display and switches noted earlier into thesketch. Change the constants at the top of the sketch as shown in the example below (using your own settings).In my example I had the buttons connected on bins 24-26.Now we configure the serial communication speed, I set it to be 9600 baud but over USB, it can reliably run faster.Lastly, indicate which ports you wired up your LCD display to.As long as all is wired up correctly you should be able to run the script on your Arduino, the display should initialiseand look like the example below. If not, switch off and check your wiring and code carefully. The PWM contrast settingcan be adjusted in thesetup()
section of the script.Building the Java code on your PC / Mac
Now is the time to obtain and build the Java source on your PC / Mac.For Java development I recommend IntelliJ IDEA that I use myself and has both freeand commercial versions available for PC / Mac / Linux. Most Java IDE’s will be able to import the mavenpom.xml
asa new project, if you use this method all dependencies will be obtained automatically using the maven POM.There are several examples contained within the code, you want to look in thecom.thecoderscorner.example.datacomms.rs232commands
package. In order to run the project, run the class:com.thecoderscorner.example.datacomms.rs232commands.ui.ArduinoControlApp
If all is working at this point you should see the serial settings dialog requesting the port and speed (above left),choose the usual serial (COM) port that Arduino studio is using, and set the speed to 9600 or whatever you set theArduino side to.Once done you should see the main screen (above right), Connection status is shown in the lower left corner, and thestatus of the last command sent on the lower right.Sending a text message to the 20x4 display
To send a text message to the server, type some text in the text box and press send, the text will be transmittedto the server and displayed on the 20x4 display. You’ll see the last command status will be set to OK very soonafterwards and the text will be on the 20x4 display on the board.Pressing any switches on the board
Likewise if you press any of the switches connected to the Arduino, they will show on the Java UI at the next statusinterval (set to approx 1 second on the sketch). There is a combined status update sent by the board every secondthat includes the latest switch states.Changing the LED combo boxes on the PC
If you tick any of the combo boxes in the Java application, you’ll see the L1 - 5 change on the Arduino display.More about the Java application
The Java application is split into two parts, User interface and data communication components, the communicationcomponents are in theprotocol
package, while the user interface parts are in theui
package.SimpleRS232ArduinoController
is where the serial communication to / from the Arduino take place. It implements the interfaceArduinoInterfaceControl
of which there is another implementation that works standalone, for running the application without a boardconnected to your PC / Mac. Torrent cubase 5 crack piratebay.There are two Windows in the application, both are Java FX based and use the FXML format. They can be loaded intoScene Builder and designed graphically. There is a resources directory that contains both of the FXML design filesand a logo.
Other pages within this category
I want to send signals via serial port using the JavaComm API classes on an Android device, and here is how I imagine it:
1- the Android device would be: Archos 3.2 which has android 2.2 and USB host mode.
Usb Ch340 Driver Windows 10
2- include RxTx lib package with my Android app. and include RxTx native code using Android NDK.
3- a short cable which is usb–>serial.
Could you explain to me where I might face problems?
How to&Answers:
I just ported the JavaCOMM ( GNU RXTX ) library to the Android. Here is the link http://v-lad.org/projects/gnu.io.android/
You still might need to rebuild your kernel and maybe recompile the shared library for your environment. But this should get you started.
Answer:
As noted above, you’ll need to come up with device drivers for whatever USB<->Serial device you have. Many of these devices use the Prolific PL2303 chip:
Usb Serial Ch340
which the stock linux kernel has support for, and has had for a long time. I’ve used this and it works fine, so I would recommend you stick with USB<->Serial devices that use this chip.
Beyond that, with udev these devices normally show up as /dev/ttyUSB#. How that happens with Android, I don’t know, so you’ll need to figure that out.
Finally, you will need to build the RxTx native code. This code is pretty crufty – I had problems building it on a fairly modern Angstrom, and I was not trying to cross-compile at all.
Answer:
Unlike the regular PCs, most of the stock kernels for the android devices come with minimum compiled modules. You need to recompile the kernel with enabled drivers for USB to serial converters. You luck depends on the specific device that you using. A lot of manufactures violate GPL, by not providing the kernel source code. Some manufactures like Motorola with the Droid 2 require signed kernel. Which makes it impossible to load custom kernel on the device.
Also, although many devices have USB host mode you have to jump through the hoops to switch the device mode. For example Motrola droid requires a special dongle to be plugged in into the USB port before powering on to switch into the host mode.
Here are some links for you that explain what you need to do:
- “More on Droid host mode,” http://www.tombom.co.uk/blog/?p=134.
- “USB Host mode on Motorola Droid,” http://www.tombom.co.uk/blog/?p=124.
Answer:
Yes, it’s definitely a mess to use the serial devices from the phone side on the Android. The problem is that the various devices present on the AOS is not documented, and rarely coincides with standard Linux ones. Thus you are never sure what/who you are actually talking to, some device, abstraction layer (HAL, UART,PCI etc). Here is a tutorial on how to talk to a serial device (the modem) from an externally USB connected PC.
In any case, if your phone does support USB host mode, there have to be another way to reach your serial port/devices using that. After all, backward compatibility does often insure some kind of FAX, telephony or external modem support from your USB cable. Also there is tehtering which may also contain some virtual serial device…
There is a tutorial for some of this here.
Ch340 Driver
PS. The main problem of such programs (like that of Vlad) and applications (like serial-api) are that they make too strong assumptions on the device/port names and the permissions needed to reach (read/write) these…
Answer:
Probably not exactly what you’re looking for, but this instructable might point you in the right direction
Answer:
The biggest problem is probably the USB->Serial Adapter:
You need the either a device driver for the USB Serial Driver, which is probably not included in the android kernel.
The other option is to use something like libusb (which may have to be ported to android as well) and a user space driver based on libusb.
Answer:
I’ve done this.
You need to:
1. Root the device.
You need to:
1. Root the device.
- Create your own module for the specific USB chiset you’re about to use: Building kernel module for Android
- I recommend using the ported usb-serial-for-android library, which has the PL2303 driver already implemented:
https://code.google.com/r/felixhaedicke-usb-serial-for-android
Answer:
What you need to do first is to root the tablet in order to get Read/Write access to the serial ports.
![Rxtx Rxtx](https://i.ytimg.com/vi/ft8LXVcYFRg/maxresdefault.jpg)
![Serial Serial](https://i.ebayimg.com/images/g/t8YAAOSwIM9bBoc8/s-l300.jpg)
After you do this take a look at Android Serial Port API. You can download the source code and see how it is implemented.
It has a native lib that gets a file descriptor to the serial ports and then you can read and write to the ports. Usually the app may not list all the available ports on the tablet. To see where your device is connected, plug it in the USB with HostMode, and in an Emulator type “dmesg | tail”. It should give you details about the device, and the port that is connected to.
I also used an Archos Tablet, mine device was connected to “/dev/ttyACM0”.
Good Luck!
Tags: android, javajava