Serial Interface
The serial input plugin, allows to retrieve messages/data from a Serial interface.
Configuration Parameters
Key | Description |
---|---|
File | Absolute path to the device entry, e.g: /dev/ttyS0 |
Bitrate | The bitrate for the communication, e.g: 9600, 38400, 115200, etc |
Min_Bytes | The serial interface will expect at least Min_Bytes to be available before to process the message (default: 1) |
Separator | Allows to specify a separator string that's used to determinate when a message ends. |
Format | Specify the format of the incoming data stream. The only option available is 'json'. Note that Format and Separator cannot be used at the same time. |
Threaded |
Getting Started
In order to retrieve messages over the Serial interface, you can run the plugin from the command line or through the configuration file:
Command Line
The following example loads the input serial plugin where it set a Bitrate of 9600, listen from the /dev/tnt0 interface and use the custom tag data to route the message.
The above interface (/dev/tnt0) is an emulation of the serial interface (more details at bottom), for demonstrative purposes we will write some message to the other end of the interface, in this case /dev/tnt1, e.g:
In Fluent Bit you should see an output like this:
Now using the Separator configuration, we could send multiple messages at once (run this command after starting Fluent Bit):
Configuration File
In your main configuration file append the following Input & Output sections:
Emulating Serial Interface on Linux
The following content is some extra information that will allow you to emulate a serial interface on your Linux system, so you can test this Serial input plugin locally in case you don't have such interface in your computer. The following procedure has been tested on Ubuntu 15.04 running a Linux Kernel 4.0.
Build and install the tty0tty module
Download the sources
Unpack and compile
Copy the new kernel module into the kernel modules directory
Load the module
You should see new serial ports in /dev/ (ls /dev/tnt*) Give appropriate permissions to the new serial ports:
When the module is loaded, it will interconnect the following virtual interfaces:
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