diff --git a/csdr/chain/multimon.py b/csdr/chain/multimon.py
index 07288fb7..5cde0a63 100644
--- a/csdr/chain/multimon.py
+++ b/csdr/chain/multimon.py
@@ -22,5 +22,5 @@ class FlexDemodulator(ServiceDemodulator, DialFrequencyReceiver):
         return False
 
     def setDialFrequency(self, frequency: int) -> None:
-        self.parse.setDialFrequency(frequency)
+        self.parser.setDialFrequency(frequency)
 
diff --git a/htdocs/lib/MessagePanel.js b/htdocs/lib/MessagePanel.js
index 7660fc36..33209bfb 100644
--- a/htdocs/lib/MessagePanel.js
+++ b/htdocs/lib/MessagePanel.js
@@ -278,7 +278,7 @@ FlexMessagePanel = function(el) {
 FlexMessagePanel.prototype = new MessagePanel();
 
 FlexMessagePanel.prototype.supportsMessage = function(message) {
-    return message['mode'] === 'Flex';
+    return message['mode'] === 'FLEX';
 };
 
 FlexMessagePanel.prototype.render = function() {
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 55c66035..b55aca09 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1844,7 +1844,7 @@ function secondary_demod_init() {
     $('#openwebrx-panel-wsjt-message').wsjtMessagePanel();
     $('#openwebrx-panel-packet-message').packetMessagePanel();
     $('#openwebrx-panel-pocsag-message').pocsagMessagePanel();
-    $('#openwebrx-panel-flex-message').pocsagMessagePanel();
+    $('#openwebrx-panel-flex-message').flexMessagePanel();
     $('#openwebrx-panel-sstv-message').sstvMessagePanel();
     $('#openwebrx-panel-fax-message').faxMessagePanel();
     $('#openwebrx-panel-js8-message').js8();
diff --git a/owrx/multimon.py b/owrx/multimon.py
new file mode 100644
index 00000000..40479ee0
--- /dev/null
+++ b/owrx/multimon.py
@@ -0,0 +1,135 @@
+from owrx.storage import Storage
+from csdr.module import ThreadModule
+from pycsdr.types import Format
+from datetime import datetime
+import pickle
+import os
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+class MultimonParser(ThreadModule):
+    def __init__(self, service: bool = False):
+        self.service   = service
+        self.frequency = 0
+        self.data      = bytearray(b'')
+        self.file      = None
+        super().__init__()
+
+    def __del__(self):
+        # Close currently open file, if any
+        self.closeFile()
+
+    def closeFile(self):
+        if self.file is not None:
+            try:
+                logger.debug("Closing log file '%s'." % self.fileName)
+                self.file.close()
+                self.file = None
+                # Delete excessive files from storage
+                logger.debug("Performing storage cleanup...")
+                Storage().cleanStoredFiles()
+
+            except Exception as exptn:
+                logger.debug("Exception closing file: %s" % str(exptn))
+                self.file = None
+
+    def newFile(self, fileName):
+        self.closeFile()
+        try:
+            self.fileName = Storage().getFilePath(fileName + ".txt")
+            logger.debug("Opening log file '%s'..." % self.fileName)
+            self.file = open(self.fileName, "wb")
+
+        except Exception as exptn:
+            logger.debug("Exception opening file: %s" % str(exptn))
+            self.file = None
+
+    def writeFile(self, data):
+        if self.file is not None:
+            try:
+                self.file.write(data)
+            except Exception:
+                pass
+
+    def getInputFormat(self) -> Format:
+        return Format.CHAR
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
+    def setDialFrequency(self, frequency: int) -> None:
+        self.frequency = frequency
+
+    def myName(self):
+        return "%s%s" % (
+            "Service" if self.service else "Client",
+            " at %dkHz" % (self.frequency // 1000) if self.frequency>0 else ""
+        )
+
+    def run(self):
+        logger.debug("%s starting..." % self.myName())
+        # Run while there is input data
+        while self.doRun:
+            # Read input data
+            inp = self.reader.read()
+            # Terminate if no input data
+            if inp is None:
+                logger.debug("%s exiting..." % self.myName())
+                self.doRun = False
+                break
+            # Add read data to the buffer
+            self.data = self.data + inp.tobytes()
+            # Process buffer contents
+            out = self.process()
+            # Keep processing while there is input to parse
+            while out is not None:
+                if len(out)>0:
+                    self.writer.write(pickle.dumps(out))
+                out = self.process()
+
+    def process(self):
+        # No result yet
+        out = None
+
+        # Search for end-of-line
+        eol = self.data.find(b'\n')
+
+        # If found end-of-line...
+        if eol>=0:
+            try:
+                msg = self.data[0:eol].decode()
+                logger.debug("%s: %s" % (self.myName(), msg))
+                # If running as a service...
+                if self.service:
+                    # Write message into open log file, including end-of-line
+                    self.writeFile(self.data[0:eol+1])
+                    # Empty result
+                    out = {}
+                else:
+                    # Split message into pipe-separated fields
+                    msg = msg.split('|')
+                    # Parse FLEX messages
+                    if len(msg)>=5 and msg[0]=='FLEX':
+                        out = {
+                            "mode":      msg[0],
+                            "timestamp": msg[1],
+                            "state":     msg[2],
+                            "frame":     msg[3],
+                            "capcode":   msg[4]
+                        }
+                        if len(msg)>=7:
+                            out.update({ "message": msg[6] })
+                    else:
+                        # Failed to parse this message
+                        out = {}
+
+            except Exception as exptn:
+                logger.debug("%s: Exception parsing: %s" % (self.myName(), str(exptn)))
+
+            # Remove parsed message from input, including end-of-line
+            del self.data[0:eol+1]
+
+        # Return parsed result or None if no result yet
+        return out