Spectrum Graph plugin for FM-DX Webserver

This plugin scans the FM radio band in under 1.5 seconds, then displayed in a spectrum window.

Instructions

• Download the latest zip file
• Extract SpectrumGraph folder, and SpectrumGraph.js to FM-DX Webserver plugins folder
• Restart FM-DX Webserver if required
• Login to Adminstrator Panel and enable plugin
• Restart FM-DX Webserver again if required
• Server-side configuration options stored in /plugins_configs/SpectrumGraph.json
• Client-side configuration options located in pluginSpectrumGraph.js

Important

For full compatibility, TEF668X radio requires TEF6686_ESP32 v2.11.11 beta or newer firmware, available from the FMDX.org Discord server, PE5PVB's GitHub, or alternatively, download my latest personal fork here.

SpectrumGraph.json

• rescanDelay: Number of seconds elapsed since the previous scan before a new scan can be initiated.
• tuningRange: Side frequencies to scan, in MHz. A value of 0 scans the entire FM/OIRT band.
• tuningStepSize: Tuning step size, in kHz. Recommended values are either 100 or 50.
• tuningBandwidth: Supported bandwidth values are 0, 56, 64, 72, 84, 97, 114, 133, 151, 168, 184, 200, 217, 236, 254, 287, and 311.
• warnIncompleteData: Enable to display console warnings about incomplete/interrupted scans. Note: Some firmware outputs data that always appears to be incomplete.
• logLocalCommands: Disable to hide commands shown in console that have been sent locally, such as from another plugin.

Tip

The granular control by tuningStepSize allows the graph's step size to be adjusted from 100 kHz to 50 kHz, enabling more precise RF signal analysis. This will, however, increase the time it takes to perform a scan.

Caution

Lowering the value of rescanDelay increases the risk of your server being overloaded with scan requests.

Known issues

• The plugin currently doesn't function if tuning is locked.

v1.2.5

• Fixed blurry gridlines
• Fixed displaying values below 0 dBf
• Added button to show spectrum graph above signal graph if screen space allows
• Fix for FM-DX Webserver v1.3.7 compatibility issue
• Minor fixes

v1.2.4

• Spectrum Graph matches canvas container size

v1.2.3

• Minor visual improvements and fixes

v1.2.2

• Minor fixes

v1.2.1

• Fixed compatibility issues with FM-DX Webserver v1.3.5
• Added visual animation effects
• Minor fixes

v1.2.0

• Added 'Hold' button
• Implementation of Scanner plugin code by Highpoint
• Minor visual fixes and changes

v1.1.7

• Added SpectrumGraph.json option to display incomplete/invalid data
• Changed handling of incomplete data

v1.1.6

• Added mouse click to tune option
• Relocated JSON data to reduce FM-DX Webserver excessive data usage

v1.1.5

• Slight graph height increase
• Graph width adjusts dynamically
• Fixed graph not loading on page load for servers using a subpath

v1.1.4

• Added 'Auto Baseline' button
• Repositioned graph peak
• Reduced browser CPU usage on mouse movement

v1.1.3

• Added frequency marker decimal round off setting
• Fixed signal unit not being displayed in some cases
• Minor visual tweaks

v1.1.2

• Added bandwidth setting
• Backend TEF module/radio firmware detection for bandwidth setting
• Improved startup antenna sequence
• Minor bug fixes

v1.1.1

• Improved handling of incomplete scans
• Minor visual improvements

v1.1.0

• Individual band scans stored for each antenna
• Signal unit matches user preference
• Missing options in SpectrumGraph.json are automatically added
• Fixed backend code that was sending commands multiple times

v1.0.0

• Official release

BETA history

v1.0.0b10

• Added tooltips
• Backend code improvements

v1.0.0b9

• Fixed webpage movement while using mouse scroll wheel
• Fixed tooltip element alignment

v1.0.0b8

• Added fixed/dynamic vertical graph button
• Added ability to use mouse scroll wheel to tune
• Fixed tooltip causing scrollbars

v1.0.0b7

• Added user configurable graph smoothing option
• Added retry delay option to configuration
• Added check for update option
• Configured plugin to not open while signal graph is hidden
• Minor visual fixes

v1.0.0b6

• Added configuration file
• Visual improvements and fixes

v1.0.0b5

• Create graph on page load if data exists
• Minor fixes

v1.0.0b4

• Fixed slight flicker that might occur

v1.0.0b3

• Added configurable graph smoothing option

v1.0.0b2

• Graph output fix for TEF radio firmware

v1.0.0b1

• First beta release