diff --git a/CHANGELOG.md b/CHANGELOG.md
index af01871..8456653 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 **unreleased**
 - Introduced `squelch_auto_margin` config option that allows configuring the auto squelch level
+- Removed `port` configuration option; `rtltcp_compat` takes the port number with the new connectors
+- Added support for new WSJT-X modes FST4 and FST4W (only available with WSJT-X 2.3)
+- New devices supported:
+  - HPSDR devices (Hermes Lite 2)
+  - BBRF103 / RX666 / RX888 devices supported by libsddc
+  - Devices using the EB200 protocol
+
+**0.20.1**
+- Remove broken OSM map fallback
 
 **0.20.0**
 - Added the ability to sign multiple keys in a single request, thus enabling multiple users to claim a single receiver
diff --git a/bands.json b/bands.json
index f216d5e..ad7cc8c 100644
--- a/bands.json
+++ b/bands.json
@@ -1,4 +1,22 @@
 [
+  {
+    "name": "2190m",
+    "lower_bound": 135700,
+    "upper_bound": 137800,
+    "frequencies": {
+      "fst4": 136000,
+      "fst4w": 136000
+    }
+  },
+  {
+    "name": "630m",
+    "lower_bound": 472000,
+    "upper_bound": 479000,
+    "frequencies": {
+      "fst4": 474200,
+      "fst4w": 474200
+    }
+  },
   {
     "name": "160m",
     "lower_bound": 1810000,
@@ -9,7 +27,9 @@
       "wspr": 1836600,
       "jt65": 1838000,
       "jt9": 1839000,
-      "js8": 1842000
+      "js8": 1842000,
+      "fst4": 1839000,
+      "fst4w": 1836800
     }
   },
   {
diff --git a/config_webrx.py b/config_webrx.py
index 0bb707f..e6d6970 100644
--- a/config_webrx.py
+++ b/config_webrx.py
@@ -117,7 +117,7 @@ Note: if you experience audio underruns while CPU usage is 100%, you can:
 # Currently supported types of sdr receivers:
 # "rtl_sdr", "rtl_sdr_soapy", "sdrplay", "hackrf", "airspy", "airspyhf", "fifi_sdr",
 # "perseussdr", "lime_sdr", "pluto_sdr", "soapy_remote", "hpsdr", "red_pitaya", "uhd",
-# "radioberry", "fcdpp", "rtl_tcp"
+# "radioberry", "fcdpp", "rtl_tcp", "sddc", "eb200"
 
 # For more details on specific types, please checkout the wiki:
 # https://github.com/jketterl/openwebrx/wiki/Supported-Hardware#sdr-devices
@@ -306,6 +306,14 @@ wsjt_decoding_depth = 3
 # jt65 seems to be somewhat prone to erroneous decodes, this setting handles that to some extent
 wsjt_decoding_depths = {"jt65": 1}
 
+# FST4 can be transmitted in different intervals. This setting determines which intervals will be decoded.
+# available values (in seconds): 15, 30, 60, 120, 300, 900, 1800
+fst4_enabled_intervals = [15, 30]
+
+# FST4W can be transmitted in different intervals. This setting determines which intervals will be decoded.
+# available values (in seconds): 120, 300, 900, 1800
+fst4w_enabled_intervals = [120, 300]
+
 # JS8 comes in different speeds: normal, slow, fast, turbo. This setting controls which ones are enabled.
 js8_enabled_profiles = ["normal", "slow"]
 # JS8 decoding depth; higher value will get more results, but will also consume more cpu
@@ -326,7 +334,7 @@ aprs_igate_password = ""
 aprs_igate_beacon = False
 
 # path to the aprs symbols repository (get it here: https://github.com/hessu/aprs-symbols)
-aprs_symbols_path = "/opt/aprs-symbols/png"
+aprs_symbols_path = "/usr/share/aprs-symbols/png"
 
 # === PSK Reporter setting ===
 # enable this if you want to upload all ft8, ft4 etc spots to pskreporter.info
diff --git a/csdr/csdr.py b/csdr/csdr.py
index c90c1b8..0c1d74a 100644
--- a/csdr/csdr.py
+++ b/csdr/csdr.py
@@ -29,7 +29,7 @@ import math
 from functools import partial
 
 from owrx.kiss import KissClient, DirewolfConfig
-from owrx.wsjt import Ft8Profile, WsprProfile, Jt9Profile, Jt65Profile, Ft4Profile
+from owrx.wsjt import Ft8Profile, WsprProfile, Jt9Profile, Jt65Profile, Ft4Profile, Fst4Profile, Fst4wProfile
 from owrx.js8 import Js8Profiles
 from owrx.audio import AudioChopper
 
@@ -421,19 +421,23 @@ class dsp(object):
 
         if self.isWsjtMode():
             smd = self.get_secondary_demodulator()
-            chopper_profile = None
+            chopper_profiles = None
             if smd == "ft8":
-                chopper_profile = Ft8Profile()
+                chopper_profiles = [Ft8Profile()]
             elif smd == "wspr":
-                chopper_profile = WsprProfile()
+                chopper_profiles = [WsprProfile()]
             elif smd == "jt65":
-                chopper_profile = Jt65Profile()
+                chopper_profiles = [Jt65Profile()]
             elif smd == "jt9":
-                chopper_profile = Jt9Profile()
+                chopper_profiles = [Jt9Profile()]
             elif smd == "ft4":
-                chopper_profile = Ft4Profile()
-            if chopper_profile is not None:
-                chopper = AudioChopper(self, self.secondary_process_demod.stdout, chopper_profile)
+                chopper_profiles = [Ft4Profile()]
+            elif smd == "fst4":
+                chopper_profiles = Fst4Profile.getEnabledProfiles()
+            elif smd == "fst4w":
+                chopper_profiles = Fst4wProfile.getEnabledProfiles()
+            if chopper_profiles is not None and len(chopper_profiles):
+                chopper = AudioChopper(self, self.secondary_process_demod.stdout, *chopper_profiles)
                 chopper.start()
                 self.output.send_output("wsjt_demod", chopper.read)
         elif self.isJs8():
@@ -575,7 +579,7 @@ class dsp(object):
     def isWsjtMode(self, demodulator=None):
         if demodulator is None:
             demodulator = self.get_secondary_demodulator()
-        return demodulator in ["ft8", "wspr", "jt65", "jt9", "ft4"]
+        return demodulator in ["ft8", "wspr", "jt65", "jt9", "ft4", "fst4", "fst4w"]
 
     def isJs8(self, demodulator = None):
         if demodulator is None:
@@ -665,6 +669,9 @@ class dsp(object):
     def get_operating_freq(self):
         return self.center_freq + self.offset_freq
 
+    def set_bandpass(self, bandpass):
+        self.set_bpf(bandpass.low_cut, bandpass.high_cut)
+
     def set_bpf(self, low_cut, high_cut):
         self.low_cut = low_cut
         self.high_cut = high_cut
diff --git a/debian/changelog b/debian/changelog
index 7357723..c7dc727 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,9 +1,23 @@
 openwebrx (0.21.0) UNRELEASED; urgency=low
   * Introduced `squelch_auto_margin` config option that allows configuring the
     auto squelch level
+  * Removed `port` configuration option; `rtltcp_compat` takes the port number
+    with the new connectors
+  * Added support for new WSJT-X modes FST4 and FST4W (only available with
+    WSJT-X 2.3)
+  * New devices supported:
+    - HPSDR devices (Hermes Lite 2) (`"type": "hpsdr"`)
+    - BBRF103 / RX666 / RX888 devices supported by libsddc (`"type": "sddc"`)
+    - Devices using the EB200 protocol (`"type": "eb200"`)
 
  -- Jakob Ketterl <jakob.ketterl@gmx.de>  Sun, 11 Oct 2020 21:12:00 +0000
 
+openwebrx (0.20.1) buster focal; urgency=low
+
+  * Remove broken OSM map fallback
+
+ -- Jakob Ketterl <jakob.ketterl@gmx.de>  Mon, 30 Nov 2020 17:29:00 +0000
+
 openwebrx (0.20.0) buster focal; urgency=low
 
   * Added the ability to sign multiple keys in a single request, thus enabling
diff --git a/debian/control b/debian/control
index 0c2fcd5..3538a8d 100644
--- a/debian/control
+++ b/debian/control
@@ -10,7 +10,7 @@ Vcs-Git: https://github.com/jketterl/openwebrx.git
 
 Package: openwebrx
 Architecture: all
-Depends: adduser, python3 (>= 3.5), python3-pkg-resources, csdr (>= 0.17), netcat, owrx-connector (>= 0.3), python3-js8py (>= 0.1), ${python3:Depends}, ${misc:Depends}
-Recommends: digiham (>= 0.3), dsd (>= 1.7), sox, direwolf (>= 1.4), wsjtx, soapysdr-tools
+Depends: adduser, python3 (>= 3.5), python3-pkg-resources, csdr (>= 0.17), netcat, owrx-connector (>= 0.4), soapysdr-tools, python3-js8py (>= 0.1), ${python3:Depends}, ${misc:Depends}
+Recommends: digiham (>= 0.3), dsd (>= 1.7), sox, direwolf (>= 1.4), wsjtx, eb200-connector, hpsdrconnector, aprs-symbols
 Description: multi-user web sdr
  Open source, multi-user SDR receiver with a web interface
\ No newline at end of file
diff --git a/docker.sh b/docker.sh
index eda1ad0..1583af6 100755
--- a/docker.sh
+++ b/docker.sh
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 ARCH=$(uname -m)
-IMAGES="openwebrx-rtlsdr openwebrx-sdrplay openwebrx-hackrf openwebrx-airspy openwebrx-rtlsdr-soapy openwebrx-plutosdr openwebrx-limesdr openwebrx-soapyremote openwebrx-perseus openwebrx-fcdpp openwebrx-radioberry openwebrx-uhd openwebrx-redpitaya openwebrx-rtltcp openwebrx-full openwebrx"
+IMAGES="openwebrx-rtlsdr openwebrx-sdrplay openwebrx-hackrf openwebrx-airspy openwebrx-rtlsdr-soapy openwebrx-plutosdr openwebrx-limesdr openwebrx-soapyremote openwebrx-perseus openwebrx-fcdpp openwebrx-radioberry openwebrx-uhd openwebrx-redpitaya openwebrx-rtltcp openwebrx-eb200 openwebrx-hpsdr openwebrx-full openwebrx"
 ALL_ARCHS="x86_64 armv7l aarch64"
 TAG=${TAG:-"latest"}
 ARCHTAG="$TAG-$ARCH"
diff --git a/docker/Dockerfiles/Dockerfile-base b/docker/Dockerfiles/Dockerfile-base
index 59b380d..c338dc0 100644
--- a/docker/Dockerfiles/Dockerfile-base
+++ b/docker/Dockerfiles/Dockerfile-base
@@ -4,6 +4,7 @@ COPY docker/files/js8call/js8call-hamlib.patch \
      docker/files/wsjtx/wsjtx.patch \
      docker/files/wsjtx/wsjtx-hamlib.patch \
      docker/files/dream/dream.patch \
+     docker/files/direwolf/direwolf-hamlib.patch \
      docker/scripts/install-dependencies.sh /
 RUN /install-dependencies.sh && \
     rm /install-dependencies.sh && \
diff --git a/docker/Dockerfiles/Dockerfile-eb200 b/docker/Dockerfiles/Dockerfile-eb200
new file mode 100644
index 0000000..f2f5181
--- /dev/null
+++ b/docker/Dockerfiles/Dockerfile-eb200
@@ -0,0 +1,12 @@
+ARG ARCHTAG
+FROM openwebrx-base:$ARCHTAG
+
+COPY docker/scripts/install-connectors.sh \
+     docker/scripts/install-dependencies-eb200.sh /
+
+RUN /install-connectors.sh &&\
+    rm /install-connectors.sh && \
+    /install-dependencies-eb200.sh && \
+    rm /install-dependencies-eb200.sh
+
+COPY . /opt/openwebrx
diff --git a/docker/Dockerfiles/Dockerfile-full b/docker/Dockerfiles/Dockerfile-full
index 3a38c9f..b68d18a 100644
--- a/docker/Dockerfiles/Dockerfile-full
+++ b/docker/Dockerfiles/Dockerfile-full
@@ -19,7 +19,9 @@ RUN /install-dependencies-rtlsdr.sh &&\
     /install-dependencies-radioberry.sh &&\
     /install-dependencies-uhd.sh &&\
     /install-dependencies-redpitaya.sh &&\
+    /install-dependencies-hpsdr.sh &&\
     /install-connectors.sh &&\
+    /install-dependencies-eb200.sh &&\
     rm /install-dependencies-*.sh &&\
     rm /install-lib.*.patch && \
     rm /install-connectors.sh
diff --git a/docker/Dockerfiles/Dockerfile-hpsdr b/docker/Dockerfiles/Dockerfile-hpsdr
new file mode 100644
index 0000000..96d58b9
--- /dev/null
+++ b/docker/Dockerfiles/Dockerfile-hpsdr
@@ -0,0 +1,9 @@
+ARG ARCHTAG
+FROM openwebrx-base:$ARCHTAG
+
+COPY docker/scripts/install-dependencies-hpsdr.sh /
+
+RUN /install-dependencies-hpsdr.sh &&\
+    rm /install-dependencies-hpsdr.sh
+
+COPY . /opt/openwebrx
diff --git a/docker/files/direwolf/direwolf-hamlib.patch b/docker/files/direwolf/direwolf-hamlib.patch
new file mode 100644
index 0000000..2347c24
--- /dev/null
+++ b/docker/files/direwolf/direwolf-hamlib.patch
@@ -0,0 +1,20 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9e710f5..da90b43 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -257,13 +257,8 @@ else()
+   set(GPSD_LIBRARIES "")
+ endif()
+ 
+-find_package(hamlib)
+-if(HAMLIB_FOUND)
+-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_HAMLIB")
+-else()
+-  set(HAMLIB_INCLUDE_DIRS "")
+-  set(HAMLIB_LIBRARIES "")
+-endif()
++set(HAMLIB_INCLUDE_DIRS "")
++set(HAMLIB_LIBRARIES "")
+ 
+ if(LINUX)
+   find_package(ALSA REQUIRED)
diff --git a/docker/scripts/install-connectors.sh b/docker/scripts/install-connectors.sh
index 33390e1..be76988 100755
--- a/docker/scripts/install-connectors.sh
+++ b/docker/scripts/install-connectors.sh
@@ -24,7 +24,8 @@ apt-get update
 apt-get -y install --no-install-recommends $BUILD_PACKAGES
 
 git clone https://github.com/jketterl/owrx_connector.git
-cmakebuild owrx_connector 0.3.0
+# latest develop as of 2020-11-28 (int32 samples; debhelper)
+cmakebuild owrx_connector 87a2fcc54e221aad71ec0700737ca7f385c388de
 
 apt-get -y purge --autoremove $BUILD_PACKAGES
 apt-get clean
diff --git a/docker/scripts/install-dependencies-eb200.sh b/docker/scripts/install-dependencies-eb200.sh
new file mode 100755
index 0000000..ce0aba1
--- /dev/null
+++ b/docker/scripts/install-dependencies-eb200.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+set -euxo pipefail
+export MAKEFLAGS="-j4"
+
+function cmakebuild() {
+  cd $1
+  if [[ ! -z "${2:-}" ]]; then
+    git checkout $2
+  fi
+  mkdir build
+  cd build
+  cmake ..
+  make
+  make install
+  cd ../..
+  rm -rf $1
+}
+
+cd /tmp
+
+STATIC_PACKAGES=""
+BUILD_PACKAGES="git cmake make gcc g++ pkg-config"
+
+apt-get update
+apt-get -y install --no-install-recommends $STATIC_PACKAGES $BUILD_PACKAGES
+
+git clone https://github.com/jketterl/eb200_connector.git
+# latest from develop as of 2020-12-01
+cmakebuild eb200_connector 9c8313770c1072df72d2fdb85307ca206c29c60a
+
+apt-get -y purge --autoremove $BUILD_PACKAGES
+apt-get clean
+rm -rf /var/lib/apt/lists/*
diff --git a/docker/scripts/install-dependencies-hpsdr.sh b/docker/scripts/install-dependencies-hpsdr.sh
new file mode 100755
index 0000000..03ff176
--- /dev/null
+++ b/docker/scripts/install-dependencies-hpsdr.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+set -euxo pipefail
+export MAKEFLAGS="-j4"
+
+BUILD_PACKAGES="git wget gcc libc6-dev"
+
+apt-get update
+apt-get -y install --no-install-recommends $BUILD_PACKAGES
+
+pushd /tmp
+
+ARCH=$(uname -m)
+GOVERSION=1.15.5
+
+case ${ARCH} in
+  x86_64)
+    PACKAGE=go${GOVERSION}.linux-amd64.tar.gz
+    ;;
+  armv*)
+    PACKAGE=go${GOVERSION}.linux-armv6l.tar.gz
+    ;;
+  aarch64)
+    PACKAGE=go${GOVERSION}.linux-arm64.tar.gz
+    ;;
+esac
+
+wget https://golang.org/dl/${PACKAGE}
+tar xfz $PACKAGE
+
+git clone https://github.com/jancona/hpsdrconnector.git
+pushd hpsdrconnector
+git checkout v0.4.2
+/tmp/go/bin/go build
+install -m 0755 hpsdrconnector /usr/local/bin
+
+popd
+
+rm -rf hpsdrconnector
+rm -rf go
+rm $PACKAGE
+
+popd
+
+apt-get -y purge --autoremove $BUILD_PACKAGES
+apt-get clean
+rm -rf /var/lib/apt/lists/*
diff --git a/docker/scripts/install-dependencies.sh b/docker/scripts/install-dependencies.sh
index a86aa56..338201c 100755
--- a/docker/scripts/install-dependencies.sh
+++ b/docker/scripts/install-dependencies.sh
@@ -69,13 +69,17 @@ mv /wsjtx.patch ${WSJT_DIR}
 cmakebuild ${WSJT_DIR}
 rm ${WSJT_TGZ}
 
-git clone --depth 1 -b 1.5 https://github.com/wb2osz/direwolf.git
+git clone --depth 1 -b 1.6 https://github.com/wb2osz/direwolf.git
 cd direwolf
 # hamlib is present (necessary for the wsjt-x and js8call builds) and would be used, but there's no real need.
-# by setting enable_hamlib we prevent direwolf from linking to it, and it can be stripped at the end of the script.
-make enable_hamlib=
+# this patch prevents direwolf from linking to it, and it can be stripped at the end of the script.
+patch -Np1 < /direwolf-hamlib.patch
+mkdir build
+cd build
+cmake ..
+make
 make install
-cd ..
+cd ../..
 rm -rf direwolf
 # strip lots of generic documentation that will never be read inside a docker container
 rm /usr/local/share/doc/direwolf/*.pdf
@@ -106,8 +110,8 @@ popd
 rm -rf dream
 rm dream-2.1.1-svn808.tar.gz
 
-git clone https://github.com/hessu/aprs-symbols /opt/aprs-symbols
-pushd /opt/aprs-symbols
+git clone https://github.com/hessu/aprs-symbols /usr/share/aprs-symbols
+pushd /usr/share/aprs-symbols
 git checkout 5c2abe2658ee4d2563f3c73b90c6f59124839802
 popd
 
diff --git a/htdocs/lib/Demodulator.js b/htdocs/lib/Demodulator.js
index a1f3798..de6f3c5 100644
--- a/htdocs/lib/Demodulator.js
+++ b/htdocs/lib/Demodulator.js
@@ -11,6 +11,8 @@ Filter.prototype.getLimits = function() {
         max_bw = 80000;
     } else if (this.demodulator.get_modulation() === 'drm') {
         max_bw = 100000;
+    } else if (this.demodulator.get_secondary_demod() === 'packet') {
+        max_bw = 12500;
     } else {
         max_bw = (audioEngine.getOutputRate() / 2) - 1;
     }
diff --git a/htdocs/map.js b/htdocs/map.js
index 0d447e2..69be2ca 100644
--- a/htdocs/map.js
+++ b/htdocs/map.js
@@ -223,26 +223,14 @@
                     case "config":
                         var config = json.value;
                         if (!map) $.getScript("https://maps.googleapis.com/maps/api/js?key=" + config.google_maps_api_key).done(function(){
-                            var mapTypeId = config.google_maps_api_key ? 'roadmap' : 'OSM';
-
                             map = new google.maps.Map($('.openwebrx-map')[0], {
                                 center: {
                                     lat: config.receiver_gps.lat,
                                     lng: config.receiver_gps.lon
                                 },
                                 zoom: 5,
-                                mapTypeId: mapTypeId
                             });
 
-                            map.mapTypes.set("OSM", new google.maps.ImageMapType({
-                                getTileUrl: function(coord, zoom) {
-                                    return "https://maps.wikimedia.org/osm-intl/" + zoom + "/" + coord.x + "/" + coord.y + ".png";
-                                },
-                                tileSize: new google.maps.Size(256, 256),
-                                name: "OpenStreetMap",
-                                maxZoom: 18
-                            }));
-
                             $.getScript("static/lib/nite-overlay.js").done(function(){
                                 nite.init(map);
                                 setInterval(function() { nite.refresh() }, 10000); // every 10s
diff --git a/owrx/audio.py b/owrx/audio.py
index 330b88b..89956fd 100644
--- a/owrx/audio.py
+++ b/owrx/audio.py
@@ -194,10 +194,11 @@ class AudioWriter(object):
         try:
             rc = decoder.wait(timeout=10)
             if rc != 0:
-                logger.warning("decoder return code: %i", rc)
+                raise RuntimeError("decoder return code: {0}".format(rc))
         except subprocess.TimeoutExpired:
             logger.warning("subprocess (pid=%i}) did not terminate correctly; sending kill signal.", decoder.pid)
             decoder.kill()
+            raise
 
     def start(self):
         (self.wavefilename, self.wavefile) = self.getWaveFile()
diff --git a/owrx/command.py b/owrx/command.py
index 87ae711..0559b72 100644
--- a/owrx/command.py
+++ b/owrx/command.py
@@ -76,4 +76,4 @@ class Option(CommandMapping):
 
 class Argument(CommandMapping):
     def map(self, value):
-        return value
+        return str(value)
diff --git a/owrx/feature.py b/owrx/feature.py
index 16e5b3d..a9cfe5a 100644
--- a/owrx/feature.py
+++ b/owrx/feature.py
@@ -68,7 +68,9 @@ class FeatureDetector(object):
         "red_pitaya": ["soapy_connector", "soapy_red_pitaya"],
         "radioberry": ["soapy_connector", "soapy_radioberry"],
         "fcdpp": ["soapy_connector", "soapy_fcdpp"],
+        "sddc": ["sddc_connector"],
         "hpsdr": ["hpsdr_connector"],
+        "eb200": ["eb200_connector"],
         # optional features and their requirements
         "digital_voice_digiham": ["digiham", "sox"],
         "digital_voice_dsd": ["dsd", "sox", "digiham"],
@@ -256,7 +258,7 @@ class FeatureDetector(object):
         )
 
     def _check_connector(self, command):
-        required_version = LooseVersion("0.3")
+        required_version = LooseVersion("0.4")
 
         owrx_connector_version_regex = re.compile("^owrx-connector version (.*)$")
 
@@ -499,9 +501,25 @@ class FeatureDetector(object):
         """
         return self.command_is_runnable("dream --help", 0)
 
+    def has_sddc_connector(self):
+        """
+        The sddc_connector allows connectivity with SDR devices powered by libsddc, e.g. RX666, RX888, HF103.
+
+        You can find more information [here](https://github.com/jketterl/sddc_connector).
+        """
+        return self._check_connector("sddc_connector")
+
     def has_hpsdr_connector(self):
         """
         In order to use the HPSDR connector, you will need to install [hpsdrconnector]
         (https://github.com/jancona/hpsdrconnector).
         """
         return self.command_is_runnable("hpsdrconnector -h")
+
+    def has_eb200_connector(self):
+        """
+        To use radios supporting the EB200 radios, you need to install the eb200_connector.
+
+        You can find more information [here](https://github.com/jketterl/eb200_connector).
+        """
+        return self._check_connector("eb200_connector")
\ No newline at end of file
diff --git a/owrx/modes.py b/owrx/modes.py
index 09e79a3..8b642e1 100644
--- a/owrx/modes.py
+++ b/owrx/modes.py
@@ -24,6 +24,12 @@ class Mode(object):
     def is_service(self):
         return self.service
 
+    def get_bandpass(self):
+        return self.bandpass
+
+    def get_modulation(self):
+        return self.modulation
+
 
 class AnalogMode(Mode):
     pass
@@ -36,6 +42,14 @@ class DigitalMode(Mode):
         super().__init__(modulation, name, bandpass, requirements, service, squelch)
         self.underlying = underlying
 
+    def get_bandpass(self):
+        if self.bandpass is not None:
+            return self.bandpass
+        return Modes.findByModulation(self.underlying[0]).get_bandpass()
+
+    def get_modulation(self):
+        return Modes.findByModulation(self.underlying[0]).get_modulation()
+
 
 class Modes(object):
     mappings = [
@@ -54,16 +68,24 @@ class Modes(object):
         AnalogMode("drm", "DRM", bandpass=Bandpass(-5000, 5000), requirements=["drm"], squelch=False),
         DigitalMode("bpsk31", "BPSK31", underlying=["usb"]),
         DigitalMode("bpsk63", "BPSK63", underlying=["usb"]),
-        DigitalMode("ft8", "FT8", underlying=["usb"], requirements=["wsjt-x"], service=True),
-        DigitalMode("ft4", "FT4", underlying=["usb"], requirements=["wsjt-x"], service=True),
-        DigitalMode("jt65", "JT65", underlying=["usb"], requirements=["wsjt-x"], service=True),
-        DigitalMode("jt9", "JT9", underlying=["usb"], requirements=["wsjt-x"], service=True),
+        DigitalMode("ft8", "FT8", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["wsjt-x"], service=True),
+        DigitalMode("ft4", "FT4", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["wsjt-x"], service=True),
+        DigitalMode("jt65", "JT65", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["wsjt-x"], service=True),
+        DigitalMode("jt9", "JT9", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["wsjt-x"], service=True),
         DigitalMode(
             "wspr", "WSPR", underlying=["usb"], bandpass=Bandpass(1350, 1650), requirements=["wsjt-x"], service=True
         ),
-        DigitalMode("js8", "JS8Call", underlying=["usb"], requirements=["js8call"], service=True),
+        DigitalMode("fst4", "FST4", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["wsjt-x"], service=True),
+        DigitalMode("fst4w", "FST4W", underlying=["usb"], bandpass=Bandpass(1350, 1650), requirements=["wsjt-x"], service=True),
+        DigitalMode("js8", "JS8Call", underlying=["usb"], bandpass=Bandpass(0, 3000), requirements=["js8call"], service=True),
         DigitalMode(
-            "packet", "Packet", underlying=["nfm", "usb", "lsb"], requirements=["packet"], service=True, squelch=False
+            "packet",
+            "Packet",
+            underlying=["nfm", "usb", "lsb"],
+            bandpass=Bandpass(-6250, 6250),
+            requirements=["packet"],
+            service=True,
+            squelch=False,
         ),
         DigitalMode(
             "pocsag",
diff --git a/owrx/pskreporter.py b/owrx/pskreporter.py
index 981ecc8..c3182b7 100644
--- a/owrx/pskreporter.py
+++ b/owrx/pskreporter.py
@@ -30,7 +30,7 @@ class PskReporter(object):
     sharedInstance = None
     creationLock = threading.Lock()
     interval = 300
-    supportedModes = ["FT8", "FT4", "JT9", "JT65", "JS8"]
+    supportedModes = ["FT8", "FT4", "JT9", "JT65", "FST4", "FST4W", "JS8"]
 
     @staticmethod
     def getSharedInstance():
diff --git a/owrx/service/__init__.py b/owrx/service/__init__.py
index 98cf557..5984050 100644
--- a/owrx/service/__init__.py
+++ b/owrx/service/__init__.py
@@ -155,18 +155,14 @@ class ServiceHandler(SdrSourceEventClient):
                     )
             else:
                 for group in groups:
-                    frequencies = sorted([f["frequency"] for f in group])
-                    min = frequencies[0]
-                    max = frequencies[-1]
-                    cf = (min + max) / 2
-                    bw = max - min
+                    cf = self.get_center_frequency(group)
+                    bw = self.get_bandwidth(group)
                     logger.debug(
                         "group center frequency: {0}, bandwidth: {1}".format(cf, bw)
                     )
                     resampler_props = PropertyLayer()
                     resampler_props["center_freq"] = cf
-                    # TODO the + 24000 is a temporary fix since the resampling optimizer does not account for required bandwidths
-                    resampler_props["samp_rate"] = bw + 24000
+                    resampler_props["samp_rate"] = bw
                     resampler = Resampler(resampler_props, self.source)
                     resampler.start()
 
@@ -180,6 +176,23 @@ class ServiceHandler(SdrSourceEventClient):
                     # resampler goes in after the services since it must not be shutdown as long as the services are still running
                     self.services.append(resampler)
 
+    def get_min_max(self, group):
+        frequencies = sorted(group, key=lambda f: f["frequency"])
+        lowest = frequencies[0]
+        min = lowest["frequency"] + Modes.findByModulation(lowest["mode"]).get_bandpass().low_cut
+        highest = frequencies[-1]
+        max = highest["frequency"] + Modes.findByModulation(highest["mode"]).get_bandpass().high_cut
+        return min, max
+
+    def get_center_frequency(self, group):
+        min, max = self.get_min_max(group)
+        return (min + max) / 2
+
+    def get_bandwidth(self, group):
+        minFreq, maxFreq = self.get_min_max(group)
+        # minimum bandwidth for a resampler: 25kHz
+        return max(maxFreq - minFreq, 25000)
+
     def optimizeResampling(self, freqs, bandwidth):
         freqs = sorted(freqs, key=lambda f: f["frequency"])
         distances = [
@@ -203,12 +216,10 @@ class ServiceHandler(SdrSourceEventClient):
                 previous = split
             groups.append([f for f in freqs if previous < f["frequency"]])
 
-            def get_bandwitdh(group):
-                freqs = sorted([f["frequency"] for f in group])
-                # the group will process the full BW once, plus the reduced BW once for each group member
-                return bandwidth + len(group) * (freqs[-1] - freqs[0] + 24000)
+            def get_total_bandwidth(group):
+                return bandwidth + len(group) * self.get_bandwidth(group)
 
-            total_bandwidth = sum([get_bandwitdh(group) for group in groups])
+            total_bandwidth = sum([get_total_bandwidth(group) for group in groups])
             return {
                 "num_splits": num_splits,
                 "total_bandwidth": total_bandwidth,
@@ -250,16 +261,9 @@ class ServiceHandler(SdrSourceEventClient):
         center_freq = source.getProps()["center_freq"]
         d.set_offset_freq(frequency - center_freq)
         d.set_center_freq(center_freq)
-        if mode == "packet":
-            d.set_demodulator("nfm")
-            d.set_bpf(-4000, 4000)
-        elif mode == "wspr":
-            d.set_demodulator("usb")
-            # WSPR only samples between 1400 and 1600 Hz
-            d.set_bpf(1350, 1650)
-        else:
-            d.set_demodulator("usb")
-            d.set_bpf(0, 3000)
+        modeObject = Modes.findByModulation(mode)
+        d.set_demodulator(modeObject.get_modulation())
+        d.set_bandpass(modeObject.get_bandpass())
         d.set_secondary_demodulator(mode)
         d.set_audio_compression("none")
         d.set_samp_rate(source.getProps()["samp_rate"])
diff --git a/owrx/source/__init__.py b/owrx/source/__init__.py
index c71c5a3..cf5e198 100644
--- a/owrx/source/__init__.py
+++ b/owrx/source/__init__.py
@@ -59,10 +59,7 @@ class SdrSource(ABC):
         self.activateProfile()
         self.wireEvents()
 
-        if "port" in props and props["port"] is not None:
-            self.port = props["port"]
-        else:
-            self.port = getAvailablePort()
+        self.port = getAvailablePort()
         self.monitor = None
         self.clients = []
         self.spectrumClients = []
diff --git a/owrx/source/connector.py b/owrx/source/connector.py
index f28da98..47eec5d 100644
--- a/owrx/source/connector.py
+++ b/owrx/source/connector.py
@@ -23,7 +23,7 @@ class ConnectorSource(SdrSource):
                 "controlPort": Option("-c"),
                 "device": Option("-d"),
                 "iqswap": Flag("-i"),
-                "rtltcp_compat": Flag("-r"),
+                "rtltcp_compat": Option("-r"),
                 "ppm": Option("-P"),
                 "rf_gain": Option("-g"),
             }
diff --git a/owrx/source/eb200.py b/owrx/source/eb200.py
new file mode 100644
index 0000000..a234a59
--- /dev/null
+++ b/owrx/source/eb200.py
@@ -0,0 +1,15 @@
+from owrx.source.connector import ConnectorSource
+from owrx.command import Argument, Flag
+
+
+class Eb200Source(ConnectorSource):
+    def getCommandMapper(self):
+        return (
+            super()
+            .getCommandMapper()
+            .setBase("eb200_connector")
+            .setMappings({
+                "long": Flag("-l"),
+                "remote": Argument(),
+            })
+        )
diff --git a/owrx/source/sddc.py b/owrx/source/sddc.py
new file mode 100644
index 0000000..58e7380
--- /dev/null
+++ b/owrx/source/sddc.py
@@ -0,0 +1,6 @@
+from owrx.source.connector import ConnectorSource
+
+
+class SddcSource(ConnectorSource):
+    def getCommandMapper(self):
+        return super().getCommandMapper().setBase("sddc_connector")
diff --git a/owrx/wsjt.py b/owrx/wsjt.py
index 0ba8160..cb9c15e 100644
--- a/owrx/wsjt.py
+++ b/owrx/wsjt.py
@@ -85,8 +85,56 @@ class Ft4Profile(WsjtProfile):
         return ["jt9", "--ft4", "-d", str(self.decoding_depth("ft4")), file]
 
 
+class Fst4Profile(WsjtProfile):
+    availableIntervals = [15, 30, 60,  120, 300, 900, 1800]
+
+    def __init__(self, interval):
+        self.interval = interval
+
+    def getInterval(self):
+        return self.interval
+
+    def getFileTimestampFormat(self):
+        if self.interval < 60:
+            return "%y%m%d_%H%M%S"
+        return "%y%m%d_%H%M"
+
+    def decoder_commandline(self, file):
+        return ["jt9", "--fst4", "-p", str(self.interval), "-d", str(self.decoding_depth("fst4")), file]
+
+    @staticmethod
+    def getEnabledProfiles():
+        config = Config.get()
+        profiles = config["fst4_enabled_intervals"] if "fst4_enabled_intervals" in config else []
+        return [Fst4Profile(i) for i in profiles if i in Fst4Profile.availableIntervals]
+
+
+class Fst4wProfile(WsjtProfile):
+    availableIntervals = [120, 300, 900, 1800]
+
+    def __init__(self, interval):
+        self.interval = interval
+
+    def getInterval(self):
+        return self.interval
+
+    def getFileTimestampFormat(self):
+        if self.interval < 60:
+            return "%y%m%d_%H%M%S"
+        return "%y%m%d_%H%M"
+
+    def decoder_commandline(self, file):
+        return ["jt9", "--fst4w", "-p", str(self.interval), "-d", str(self.decoding_depth("fst4w")), file]
+
+    @staticmethod
+    def getEnabledProfiles():
+        config = Config.get()
+        profiles = config["fst4w_enabled_intervals"] if "fst4w_enabled_intervals" in config else []
+        return [Fst4wProfile(i) for i in profiles if i in Fst4wProfile.availableIntervals]
+
+
 class WsjtParser(Parser):
-    modes = {"~": "FT8", "#": "JT65", "@": "JT9", "+": "FT4"}
+    modes = {"~": "FT8", "#": "JT65", "@": "JT9", "+": "FT4", "`": "FST4"}
 
     def parse(self, messages):
         for data in messages:
@@ -115,7 +163,7 @@ class WsjtParser(Parser):
                         PskReporter.getSharedInstance().spot(out)
 
                 self.handler.write_wsjt_message(out)
-            except ValueError:
+            except (ValueError, IndexError):
                 logger.exception("error while parsing wsjt message")
 
     def pushDecode(self, mode):
@@ -139,6 +187,8 @@ class WsjtParser(Parser):
 
 
 class Decoder(ABC):
+    locator_pattern = re.compile(".*\\s([A-Z0-9]{2,})(\\sR)?\\s([A-R]{2}[0-9]{2})$")
+
     def parse_timestamp(self, instring, dateformat):
         ts = datetime.strptime(instring, dateformat)
         return int(
@@ -149,23 +199,36 @@ class Decoder(ABC):
     def parse(self, msg, dial_freq):
         pass
 
+    def parseMessage(self, msg):
+        m = Decoder.locator_pattern.match(msg)
+        if m is None:
+            return {}
+        # this is a valid locator in theory, but it's somewhere in the arctic ocean, near the north pole, so it's very
+        # likely this just means roger roger goodbye.
+        if m.group(3) == "RR73":
+            return {"callsign": m.group(1)}
+        return {"callsign": m.group(1), "locator": m.group(3)}
+
 
 class Jt9Decoder(Decoder):
-    locator_pattern = re.compile(".*\\s([A-Z0-9]+)\\s([A-R]{2}[0-9]{2})$")
-
     def parse(self, msg, dial_freq):
         # ft8 sample
         # '222100 -15 -0.0  508 ~  CQ EA7MJ IM66'
         # jt65 sample
         # '2352  -7  0.4 1801 #  R0WAS R2ABM KO85'
         # '0003  -4  0.4 1762 #  CQ R2ABM KO85'
+        # fst4 sample
+        # '**** -23  0.6 3023 `  <...> <...> R 591631 BI53PV'
         modes = list(WsjtParser.modes.keys())
         if msg[19] in modes:
             dateformat = "%H%M"
         else:
             dateformat = "%H%M%S"
-        timestamp = self.parse_timestamp(msg[0 : len(dateformat)], dateformat)
-        msg = msg[len(dateformat) + 1 :]
+        try:
+            timestamp = self.parse_timestamp(msg[0 : len(dateformat)], dateformat)
+        except ValueError:
+            timestamp = None
+        msg = msg[len(dateformat) + 1:]
         modeChar = msg[14:15]
         mode = WsjtParser.modes[modeChar] if modeChar in WsjtParser.modes else "unknown"
         wsjt_msg = msg[17:53].strip()
@@ -181,16 +244,6 @@ class Jt9Decoder(Decoder):
         result.update(self.parseMessage(wsjt_msg))
         return result
 
-    def parseMessage(self, msg):
-        m = Jt9Decoder.locator_pattern.match(msg)
-        if m is None:
-            return {}
-        # this is a valid locator in theory, but it's somewhere in the arctic ocean, near the north pole, so it's very
-        # likely this just means roger roger goodbye.
-        if m.group(2) == "RR73":
-            return {"callsign": m.group(1)}
-        return {"callsign": m.group(1), "locator": m.group(2)}
-
 
 class WsprDecoder(Decoder):
     wspr_splitter_pattern = re.compile("([A-Z0-9]*)\\s([A-R]{2}[0-9]{2})\\s([0-9]+)")