make auto squelch level margin configurable

CHANGELOG.md

@@ -1,4 +1,5 @@
 **unreleased**
+- Introduced `squelch_auto_margin` config option that allows configuring the auto squelch level
 
 **0.20.0**
 - Added the ability to sign multiple keys in a single request, thus enabling multiple users to claim a single receiver

config_webrx.py

@@ -279,6 +279,11 @@ waterfall_auto_level_margin = {"min": 3, "max": 10, "min_range": 50}
 #        \_waterfall_auto_level_margin["min"]_/ |__ current_min_power_level          | \_waterfall_auto_level_margin["max"]_/
 #                                                          current_max_power_level __|
 
+# This setting tells the auto-squelch the offset to add to the current signal level to use as the new squelch level.
+# Lowering this setting will give you a more sensitive squelch, but it may also cause unwanted squelch openings when
+# using the auto squelch.
+squelch_auto_margin = 10  # in dB
+
 # === Experimental settings ===
 # Warning! The settings below are very experimental.
 csdr_dynamic_bufsize = False  # This allows you to change the buffering mode of csdr.

debian/changelog

@@ -1,4 +1,6 @@
 openwebrx (0.21.0) UNRELEASED; urgency=low
+  * Introduced `squelch_auto_margin` config option that allows configuring the
+    auto squelch level
 
  -- Jakob Ketterl <jakob.ketterl@gmx.de>  Sun, 11 Oct 2020 21:12:00 +0000
 

htdocs/index.html

@@ -168,7 +168,7 @@
                     <input title="Waterfall minimum level" id="openwebrx-waterfall-color-min" class="openwebrx-panel-slider" type="range" min="-200" max="100" value="50" step="1" onchange="updateWaterfallColors(0);" oninput="updateVolume()">
                 </div>
                 <div class="openwebrx-panel-line">
-                    <div title="Auto-set squelch level" class="openwebrx-squelch-default openwebrx-button"><span class="sprite sprite-squelch openwebrx-sliderbtn-img"></span></div>
+                    <div title="Auto-set squelch level" class="openwebrx-squelch-auto openwebrx-button"><span class="sprite sprite-squelch openwebrx-sliderbtn-img"></span></div>
                     <input title="Squelch" class="openwebrx-squelch-slider openwebrx-panel-slider" type="range" min="-150" max="0" value="-150" step="1">
                     <div title="Set waterfall colors to default" id="openwebrx-waterfall-colors-default" class="openwebrx-button" onclick="waterfallColorsDefault()"><span class="sprite sprite-waterfall-default openwebrx-sliderbtn-img"></span></div>
                     <input title="Waterfall maximum level" id="openwebrx-waterfall-color-max" class="openwebrx-panel-slider" type="range" min="-200" max="100" value="50" step="1" onchange="updateWaterfallColors(1);" oninput="updateVolume()">

htdocs/lib/DemodulatorPanel.js

@@ -3,6 +3,7 @@ function DemodulatorPanel(el) {
     self.el = el;
     self.demodulator = null;
     self.mode = null;
+    self.squelchMargin = 10;
 
     var displayEl = el.find('.webrx-actual-freq')
     this.tuneableFrequencyDisplay = displayEl.tuneableFrequencyDisplay();
@@ -27,9 +28,9 @@ function DemodulatorPanel(el) {
             self.setMode(value);
         }
     });
-    el.on('click', '.openwebrx-squelch-default', function() {
+    el.on('click', '.openwebrx-squelch-auto', function() {
         if (!self.squelchAvailable()) return;
-        el.find('.openwebrx-squelch-slider').val(getLogSmeterValue(smeter_level) + 10);
+        el.find('.openwebrx-squelch-slider').val(getLogSmeterValue(smeter_level) + self.getSquelchMargin());
         self.updateSquelch();
     });
     el.on('change', '.openwebrx-squelch-slider', function() {
@@ -247,7 +248,7 @@ DemodulatorPanel.prototype.updateButtons = function() {
     }
     var squelch_disabled = !this.squelchAvailable();
     this.el.find('.openwebrx-squelch-slider').prop('disabled', squelch_disabled);
-    this.el.find('.openwebrx-squelch-default')[squelch_disabled ? 'addClass' : 'removeClass']('disabled');
+    this.el.find('.openwebrx-squelch-auto')[squelch_disabled ? 'addClass' : 'removeClass']('disabled');
 }
 
 DemodulatorPanel.prototype.setCenterFrequency = function(center_freq) {
@@ -322,6 +323,15 @@ DemodulatorPanel.prototype.updateSquelch = function() {
     if (demod) demod.setSquelch(sliderValue);
 };
 
+DemodulatorPanel.prototype.setSquelchMargin = function(margin) {
+    if (!margin || this.squelchMargin == margin) return;
+    this.squelchMargin = margin;
+};
+
+DemodulatorPanel.prototype.getSquelchMargin = function() {
+    return this.squelchMargin;
+};
+
 $.fn.demodulatorPanel = function(){
     if (!this.data('panel')) {
         this.data('panel', new DemodulatorPanel(this));

htdocs/openwebrx.js

@@ -726,6 +726,7 @@ function on_ws_recv(evt) {
                         var demodulatorPanel = $('#openwebrx-panel-receiver').demodulatorPanel();
                         demodulatorPanel.setCenterFrequency(center_freq);
                         demodulatorPanel.setInitialParams(initial_demodulator_params);
+                        demodulatorPanel.setSquelchMargin(config['squelch_auto_margin']);
                         bookmarks.loadLocalBookmarks();
 
                         waterfall_clear();

owrx/connection.py

@@ -123,6 +123,7 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
         "center_freq",
         "initial_squelch_level",
         "profile_id",
+        "squelch_auto_margin",
     ]
 
     def __init__(self, conn):