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44 lines
1.8 KiB
Markdown
44 lines
1.8 KiB
Markdown
2 years ago
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---
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layout: page2
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title: Log4OM UDP Display
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---
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[Git Repository](https://git.pickmy.org/nq4t/Log4OM-WebStatus)
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Recently Log4OM added support for UDP message output in it's remote control. One of the settings has Log4OM automatically
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send status messages every five seconds when the following conditions are met:
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- CAT engine is running and connected to a valid radio
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- Message output is enabled in program configuration
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This can be used to build a very basic status display you can embed in a webpage.
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### Requirements
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A machine that can run Python scripts that can:
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- Recieve UDP messages from Log4OM
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- Put the resulting HTML file on a webserver
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It is currently written to be running on the same machine as the webserver. Additional methods of getting the file to an
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external machine have not been created due to the numerous ways of doing so. It's also written this way as I run a server
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at my QTH that's accessible to the internet.
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### Example
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I have embedded the status on the sidebar/menu of [my website](https://nq4t.com). The raw file lives [here](https://log.nq4t.com/radio.html)
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My version has CSS applied to match my website. The default version does not.
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### Basic Theory Of Operation
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Log4OM sends packets to my server's IP. Python picks these up, parses the required information out, and stuffs them in to
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some HTML it saves directly to the server. This file is set to auto-refresh every 5 seconds.
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A monitoring thread checks every few seconds to see when the last packet was received. If it doesn't see any in about 15
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seconds; it changes the status to indicate this. In this state, it only checks for updates every 30 seconds.
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The thread listening for UDP always runs. When UDP starts streaming in, it immedately executes.
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It can be considered real-time to within 30 seconds or so.
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