This tutorial of Robo India explains how to install driver of CH340 USB to serial converter.
The RXTX library enables access to serial interfaces in Java applications. It allows the implementation of arbitrary serial protocols and can be used at both ends of the serial link. This post demonstrated a simple example to read output from the Raspberry Pi and send commands to it. Arduino CH340 Rx-Tx loopback test Hi, is it normal that if I connect GRN - RST to force arduino uno clone (CH340) to use it as USB TTL converter and connect TX to RX each other and start arduino ide serial monitor or Putty, the loopback test fails?
- What I was doing with the Serial/USB adapter was programming a new Motorola two way radio so it could be used in our network. This is a task is something done very infrequently. Finding a way to use my existing serial/USB adapter allowed me to accomplish what I needed to do without waiting to find an adapter supported by Win10.
- Jan 17, 2018 D:ProgrammingJAVAJSerialCommjava -cp D:ProgrammingJAVAJSerialCommjSerialComm-1.3.11.jar. SerialTransmitInteger List COM ports comPorts0 = Communications Port (COM1) comPorts1 = USB-SERIAL CH340 (COM9) enter an integer 678 Read 32 bytes from COM port: Arduino received integer = 678 enter an integer 567.
- I recently bought this ESP8266 WiFi module (ie ESP-01) for my IOT project. This is a self contained chip and can be programmed to do the respective tasks. To ease out the task of programming, I bought this ESP-01 ESP8266 Programmer CH340G Chip USB WiFi Wireless UART GPIO0 Adapter.
1. Introduction:
Download windows driver from here .
CH340 windows driver
2. Automatic installation:
If you are connected to internet, just plug CH340 USB to serial converter to your computer, windows will detect and download driver. You will see following message on successful installation. CH340 is installed on comport 23.
Arduino Nano Board with prototype board.
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3. Manual installation
Follow following instruction to manually install driver of CH340.
3.1 Download driver from the link provided above in this tutorial.
3.2 Go to start menu.
3.3 Right click on My Computer.
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3.5 Click on Properties
3.6 Select Device Manager form left control panel
3.7 Expand USB options available
3.8 Right click on CH340
3.9 Select Update driver
3.10 Select browse option
3.11 Extract the downloaded folder, downloaded in step 3.1
3.12 locate step 3.10 browse to the extracted folder
3.13 follow the further instruction of your computer
3.14 your CH340 device will be installed
![Serial Serial](https://2.bp.blogspot.com/_Zt-ZuI8IqOE/SbDZ-M1nxxI/AAAAAAAAAFE/O7RVUC2yVT0/s400/java-evil-edition.png)
3.15 Note down the comport allotted to your device.
If you have any query please write us at [email protected]
Thanks and Regards
Content Development Team
Robo India
http://roboindia.com
Content Development Team
Robo India
http://roboindia.com
From Rxtx
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The documentation below is a little dated and could do with some updating. Please could someone reformat and ensure their correctness:
Java Rxtx Usb Serial Ch340 Driver Windows 10
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Requirements
You will need JDK 1.4+ (JDK 1.3 might work), autoconf, automake, libtool, gnu make and gcc.
Note that you are recommended to use the JDK, as opposed to the gcc flavour, since the latter will most probably cause you issues. If your OS does not provide a proper version, or a package manager that will get it for you, then you can download the JDK from the Java SE Downloads page.
Installing from Source
Installing Java
If you don't already have Java installed on your system, you will need to install it. The best way, if possible, is to use the package manager for your distribution to install it. Failing that you can get a JDK (Java Developer Kit) installer from Sun's Java Developer web site. People who just want to run their Java applications can get the JRE installation, though note that you will not be able to develop or compile with the JRE. Since the general instructions are oriented towards developers, we recommend having the JDK installed.
If the environment variable JAVA_HOME is not defined, then it is recommend that you define it in your login script. For example if your Java installation is located at /usr/java/jdk6_03, then in a csh style shell run:
or an sh style shell run:
Installing RXTX
General Steps
Once you have downloaded the source, extract it (alternatively: get it from CVS), and then in a terminal window navigate to the extracted directory and type the command:
This will configure the build and generate the necessary make files. configure will pick up the location of the Java installation from JAVA_HOME, look for the line that says something like:
Note, that there may be supplementary options you may want to configure, though the standard options should suffice. To see what they are:
Once configure has finished running, start the make process:
Note: Spaces in the path may cause the build to fail. If it does ensure the path does not have any spaces. |
At this point there are several ways of 'installing' rxtx: using 'make install', adding the libraries to your path, or using it with your IDE. These are explained in the following subsections.
Once you have completed the steps, RXTX should now be installed. See the development section for some example code to get you running.
(I'm editing the Linux Installation wiki page because there doesn't seem to be a more appropriate place)
As I wanted to use the Java/Linux rxtx libraries with an Arduino Uno prototype microcontroller, I looked at the libs available in Arduino 0022 which appeared to be the 2.1 version, so I went looking for the latest 2.2pre2.
Thankfully, Debian 6.0.1a includes a package so you don't have to build it.
Execute the following to install the package:
Execute the following to install the package:
This installed the following (among other things):
Since I also wanted to build it, I had to install the following supporting build utilities:
After downloading and extracting to $HOME/Downloads/rxtx here's the build script I used:
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On attempting a build, 'make install' consistently fails with:
However, it appeared to create the RXTXcomm.jar and librxtxSerial.so w/symbolic links, so I executed the following to get the compiled Java/Linux libs in a directory off of home:
.then included the following in $HOME/.bashrc:
Upon using it, I found that when executed on Linux the gnu.io.CommPortIdentifier serial devices did not include ttyACM so it would never recognize the Arduino Uno plugged in to the USB port on my system. I had to edit ./src/gnu/io/RXTXCommDriver.java to include the following after line 581:
Once I rebuilt it with this change, it successfully worked and I was good to go. I have since been using the locally built libraries without issue so far.
It would be nice if the rxtx developers would include this change in the source distribution package, as well as fixing 'make install' which successfully builds the libs but fails to complete the deploy.
Until then, these notes should provide enough reference to work around these issues.
Usb Serial Ch340
Questions/comments/additions/corrections are welcome, just drop me a line. Thanks.
Method 1: Make Install
You either do this as root user, or by using sudo:
The RXTX jar file and binary libraries will be put into the JDK's or JRE's lib/ext subdirectory.
Method 2: Adding to your path
- Copy RXTXcomm.jar and librxtxSerial.so to a location of your choice.
- Add the jar to your CLASSPATH, specifying the absolute path to the JAR, for example if it is in /home/myuser/javalibs, csh syntax and sh syntax:
- Add the folder containing the native library to the LD_LIBRARY_PATH, for example if it is in /home/myuser/lib
Note, that since the atcual library has a version in its name, you should ensure that a symbolic link is made to the library using an unversioned name, in the same folder. For example:
Method 3: With an IDE
Also, if you are using an IDE such as Eclipse, you can opt to include them in your project instead. If your project is MyHelloWorld then locations would be:
Usb-serial Ch340 (com5)
- MyHelloWorld/lib/RXTXcomm.jar
- MyHelloWorld/librxtxSerial.so
Don't forget to include them in your build path.
Note, that since the atcual library has a version in its name, you should ensure that a symbolic link is made to the library using an unversioned name, in the same folder. For example:
Installing Binaries
Linux
Copy the binaries (librxtxSerial.so and librxtxParallel.so) to $JAVA_HOME/lib/i386
(to do for other systems)
Retrieved from 'http://rxtx.qbang.org/wiki/index.php/Installation_on_Linux'