diff --git a/overlay/etc/udev/rules.d/89-et-xiegu-x6100.rules b/overlay/etc/udev/rules.d/89-et-xiegu-x6100.rules
new file mode 100644
index 0000000..319f137
--- /dev/null
+++ b/overlay/etc/udev/rules.d/89-et-xiegu-x6100.rules
@@ -0,0 +1,26 @@
+# Author   : Gaston Gonzalez
+# Date     : 5 October 2025
+# Purpose  : udev rules for the Xiegu X6100
+#
+# Preconditions:
+# 1. Xiegu X6100 connected via USB cable
+#
+# Postconditions:
+# 1. /dev/et-cat created
+# 2. rigctld is started
+# 3. /dev/et-audio created
+
+SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="55d2", ENV{ET_DEVICE}=="", \
+    PROGRAM="/opt/emcomm-tools/sbin/udev-tester.sh xiegu-x6100", \
+    ACTION=="add", \
+    ENV{ET_DEVICE}="X6100", ENV{ET_SUBDEVICE}="CAT", GROUP="dialout", MODE="0660", SYMLINK+="et-cat", \
+    RUN+="/usr/bin/systemctl start rigctld"
+
+# This soundcard will collide with the DigiRig, so we need to ensure that this 
+# rule is ordered before it and that we guard the match with the PROGRAM check.
+SUBSYSTEM=="sound", ATTRS{idVendor}=="0d8c", ATTRS{idProduct}=="0012", \
+    PROGRAM="/opt/emcomm-tools/sbin/udev-tester.sh xiegu-x6100", \
+    ACTION=="add", \
+    ENV{ET_DEVICE}="X6100", \
+    ATTR{id}="ET_AUDIO", \
+    ENV{ET_SUBDEVICE}="AUDIO", GROUP="audio", MODE="0660", SYMLINK+="et-audio"
diff --git a/overlay/opt/emcomm-tools/bin/et-audio b/overlay/opt/emcomm-tools/bin/et-audio
index b7a4e05..4aa9062 100755
--- a/overlay/opt/emcomm-tools/bin/et-audio
+++ b/overlay/opt/emcomm-tools/bin/et-audio
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 31 October 2024
-# Updated : 26 September 2025
+# Updated : 5 October 2025
 # Purpose : Configures ET audio device with sane defaults
 #
 # Preconditions
@@ -112,6 +112,18 @@ update-config () {
 
            et-log "Applied amixer settings for ${ET_DEVICE_NAME}"
 	   ;;
+         "X6100")
+           # Unmute Speaker a set volume. Adjust if remote station can't decode you.
+           amixer -q -c ${AUDIO_CARD} sset Speaker Playback Switch 42% unmute
+           # Unmute Mic
+           amixer -q -c ${AUDIO_CARD} sset Mic Playback Switch 52% unmute
+           # Set "L/R Capture" to 19. Adjust if you can't decode received audio. 
+           amixer -q -c ${AUDIO_CARD} sset Mic Capture Switch 31% unmute
+           # Disable Auto Gain Control
+           amixer -q -c ${AUDIO_CARD} sset 'Auto Gain Control' mute
+
+           et-log "Applied amixer settings for ${ET_DEVICE_NAME}"
+         ;;
          *)
            et-log "No ALSA configuration specified for this ET_DEVICE."
          ;;
diff --git a/overlay/opt/emcomm-tools/bin/et-common b/overlay/opt/emcomm-tools/bin/et-common
index bc781dd..b3e94aa 100755
--- a/overlay/opt/emcomm-tools/bin/et-common
+++ b/overlay/opt/emcomm-tools/bin/et-common
@@ -1,7 +1,7 @@
 #!/bin/bash
 # Author  : Gaston Gonzalez
 # Date    : 1 February 2025
-# Updated : 20 August 2025
+# Updated : 7 October 2025
 # Purpose : Common environment variables and functions
 
 # Standardized device paths for supported hardware
@@ -10,6 +10,10 @@ export ET_DEVICE_CAT="/dev/et-cat"
 export ET_DEVICE_GPS="/dev/et-gps"
 export ET_DEVICE_SDR="/dev/et-sdr"
 
+# Standardized configuration locations and files
+export ET_HOME="/opt/emcomm-tools"
+export ET_ACTIVE_RADIO_CONF="${ET_HOME}/conf/radios.d/active-radio.json"
+
 export ESC="\x1B"
 export RED="${ESC}[1;31m"
 export BLUE="${ESC}[1;34m"
@@ -141,3 +145,24 @@ download_with_retries() {
   echo "Download failed after $max_retries attempts."
   return 1
 }
+
+# prime_rigctld_conn makes a connection to the rig control daemon (rigctld)
+# and requests the radio's frequency in an effort to initialize CAT control.
+#
+# For example, it takes almost 6 seconds for rig control clients (including 
+# the rigctl client) to connect the first time with the Xiegu X6100 to rigctld.
+# JS8Call will fail to handle this properly if this "priming" task is not
+# executed before it starts up..
+prime_rigctld_conn() {
+ 
+  ACTIVE_RADIO=$(jq -r -e '.rigctrl.primeRig' ${ET_ACTIVE_RADIO_CONF})
+  if [[ $? -eq 0 ]]; then
+    if [[ "${ACTIVE_RADIO}" = "true" ]]; then
+      et-log "Priming rig control client connection"
+      notify_user "Please be patient. Priming connection to radio."
+      rigctl -m 2 f > /dev/null
+    else
+      et-log "No rigctld priming needed" 
+    fi
+  fi
+}
diff --git a/overlay/opt/emcomm-tools/bin/et-js8call b/overlay/opt/emcomm-tools/bin/et-js8call
index 76315d2..401a577 100755
--- a/overlay/opt/emcomm-tools/bin/et-js8call
+++ b/overlay/opt/emcomm-tools/bin/et-js8call
@@ -2,7 +2,7 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 24 October 2024
-# Updated : 5 October 2025
+# Updated : 7 October 2025
 # Purpose : Wrapper script for starting JS8Call with PnP support
 #
 # Preconditions
@@ -12,6 +12,7 @@
 # 1. Stop all running EmComm Tools modes
 # 2. JS8Call audio settings updated
 # 3. JS8Call started
+. /opt/emcomm-tools/bin/et-common
 
 usage() {
   echo "usage: $(basename $0) <command>"
@@ -32,6 +33,10 @@ notify_user() {
 }
 
 start() {
+
+  # Ensure that we have a pre-initialized CAT control connection for select radios
+  prime_rigctld_conn
+
   /opt/emcomm-tools/bin/et-kill-all && update-config && /usr/bin/js8call &
 
   if [ ! -e /dev/et-gps ]; then
@@ -42,7 +47,7 @@ start() {
 
 }
 
-update-config () {
+update-config() {
 
     JS8CALL_CONF_FILE="${HOME}/.config/JS8Call.ini"
    
diff --git a/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json b/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json
new file mode 100644
index 0000000..2550b68
--- /dev/null
+++ b/overlay/opt/emcomm-tools/conf/radios.d/xiegu-x6100.json
@@ -0,0 +1,22 @@
+{
+  "id": "xiegu-x6100",
+  "vendor": "Xiegu",
+  "model": "X6100",
+  "rigctrl": {
+    "id": "3087",
+    "baud": "19200",
+    "ptt": "RIG",
+    "conf": "timeout=1000,retry=1,timeout_retry=1",
+    "primeRig": true
+  },
+  "notes": [
+    "Turn on radio",
+    "Plug USB-C cable into the DEV port",
+    "Set mode to U-DIG",
+    "Set filter to FILTER1",
+    "Set AGC to AGC--"
+  ],
+  "fieldNotes": [
+    "Tested with firmware version: 1.1.9 APP / 1.1.8 BASE"
+  ]
+}
diff --git a/overlay/opt/emcomm-tools/sbin/udev-tester.sh b/overlay/opt/emcomm-tools/sbin/udev-tester.sh
index 02fb7f9..5959aab 100755
--- a/overlay/opt/emcomm-tools/sbin/udev-tester.sh
+++ b/overlay/opt/emcomm-tools/sbin/udev-tester.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # Author  : Gaston Gonzalez
 # Date    : 11 October 2024
-# Updated : 13 September 2025
+# Updated : 5 October 2025
 # Purpose : Perform tests that can be used by the udev subsystem to aid
 #           in rule development. This is intended to by used with the PROGRAM
 #           directive inside of a udev rule.
@@ -13,6 +13,20 @@
 ET_HOME=/opt/emcomm-tools
 ACTIVE_RADIO="${ET_HOME}/conf/radios.d/active-radio.json"
 
+# Exit with a 0 exit status if, and only if, the currently selected radio is
+# a Xiegu X6100 
+test_xiegu_x6100() {
+  if [[ -L "${ET_HOME}/conf/radios.d/active-radio.json" ]]; then
+    ID=$(cat "${ET_HOME}/conf/radios.d/active-radio.json" | jq -r .id)
+
+    if [[ "$ID" == "xiegu-x6100" ]]; then
+      exit 0
+    fi
+  fi
+  
+  exit 1
+}
+
 # Exit with a 0 exit status if, and only if, the currently selected radio is
 # a Yaesu FTX-1.
 test_yaesu_ftx1() {
@@ -101,6 +115,9 @@ if [ $# -ne 1 ]; then
 fi
 
 case $1 in
+  xiegu-x6100)
+    test_xiegu_x6100
+  ;;
   yaesu-ftx1)
     test_yaesu_ftx1
   ;;
@@ -112,6 +129,7 @@ case $1 in
   ;;
   digirig-mobile)
     test_digirig_mobile
+  ;;
 esac
 
 exit 1
diff --git a/scripts/install-hamlib.sh b/scripts/install-hamlib.sh
index 423ba7d..174745f 100755
--- a/scripts/install-hamlib.sh
+++ b/scripts/install-hamlib.sh
@@ -2,46 +2,48 @@
 #
 # Author  : Gaston Gonzalez
 # Date    : 25 November 2022
-# Updated : 19 May 2024
-# Purpose : Install hamlib for rig control
+# Updated : 6 October 2025
+# Purpose : Install hamlib for rig control (rigctld)
 set -e
+trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
+trap 'et-log "\"${last_command}\" command failed with exit code $?."' ERR
 
-ET_DIST_DIR=/opt/dist
-ET_SRC_DIR=/opt/src
+. ./env.sh
+. ../overlay/opt/emcomm-tools/bin/et-common
 
-VERSION=4.5
-APP_AND_VERSION=hamlib-$VERSION
-TARBALL=$APP_AND_VERSION.tar.gz
-URL=https://github.com/Hamlib/Hamlib/releases/download/$VERSION/$TARBALL
-INSTALL_DIR=/opt/$APP_AND_VERSION
-LINK_PATH=/opt/hamlib
+APP="hamlib"
+VERSION=4.6.5
+APP_AND_VERSION="${APP}-${VERSION}"
+INSTALL_DIR="/opt/${APP_AND_VERSION}"
+LINK_PATH="/opt/${APP}"
+TARBALL=${APP_AND_VERSION}.tar.gz
+URL=https://github.com/Hamlib/Hamlib/releases/download/${VERSION}/${TARBALL}
 
-if [ ! -e $ET_DIST_DIR/$TARBALL ]; then
+if [[ ! -e $ET_DIST_DIR/$TARBALL ]]; then
   et-log "Downloading hamlib: $URL "
-  curl -s -L -O --fail $URL
+  download_with_retries ${URL} ${TARBALL}
 
-  [ ! -e $ET_DIST_DIR ] && mkdir -v $ET_DIST_DIR
-  [ ! -e $ET_SRC_DIR ] && mkdir -v $ET_SRC_DIR
+  [ ! -e ${ET_DIST_DIR} ] && mkdir -v ${ET_DIST_DIR}
+  [ ! -e ${ET_SRC_DIR} ] && mkdir -v ${ET_SRC_DIR}
 
-  mv $TARBALL $ET_DIST_DIR
+  mv ${TARBALL} ${ET_DIST_DIR}
 fi
 
 CWD_DIR=`pwd`
 
-cd $ET_SRC_DIR
-et-log "Unpacking $ET_DIST_DIR/$TARBALL"
-tar -xzf $ET_DIST_DIR/$TARBALL && cd $APP_AND_VERSION
+cd ${ET_SRC_DIR}
+et-log "Unpacking ${ET_DIST_DIR}/${TARBALL}"
+tar -xzf ${ET_DIST_DIR}/${TARBALL} && cd ${APP_AND_VERSION}
 
-[ ! -e $INSTALL_DIR ] && mkdir -v $INSTALL_DIR
+[ ! -e ${INSTALL_DIR} ] && mkdir -v ${INSTALL_DIR}
 
-et-log "Building Hamlib $VERSION"
-./configure --prefix=$INSTALL_DIR
+et-log "Building Hamlib ${VERSION}"
+./configure --prefix=${INSTALL_DIR}
 make && make check && make install
 
-[ -e $LINK_PATH ] && rm $LINK_PATH
-ln -v -s $INSTALL_DIR $LINK_PATH
+[ -e ${LINK_PATH} ] && rm ${LINK_PATH}
+ln -v -s ${INSTALL_DIR} ${LINK_PATH}
 
-stow -v -d /opt hamlib -t /usr/local
+stow -v -d /opt ${APP} -t /usr/local
 
 cd $CWD_DIR
-
diff --git a/tests/test-hamlib.sh b/tests/test-hamlib.sh
new file mode 100755
index 0000000..acff967
--- /dev/null
+++ b/tests/test-hamlib.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Author   : Gaston Gonzalez
+# Date     : 8 November 2024
+# Updated  : 6 October 2025
+# Purpose  : Test hamlib installation
+
+OUT=$(which rigctld)
+exit $?