diff --git a/gamutrf/grpduzmq.py b/gamutrf/grpduzmq.py
index 1eeb7ee2..a25f6a3b 100644
--- a/gamutrf/grpduzmq.py
+++ b/gamutrf/grpduzmq.py
@@ -4,6 +4,7 @@
 import sys
 import pmt
 import zmq
+import zstandard
 
 try:
     from gnuradio import gr  # pytype: disable=import-error
@@ -38,6 +39,7 @@ def __init__(
         self.zmq_pub.bind(zmq_addr)
         self.message_port_register_in(pmt.intern("json"))
         self.set_msg_handler(pmt.intern("json"), self.receive_pdu)
+        self.context = zstandard.ZstdCompressor()
 
     def stop(self):
         self.zmq_pub.close()
@@ -45,6 +47,8 @@ def stop(self):
     def receive_pdu(self, pdu):
         item = pmt.to_python(pmt.cdr(pdu)).tobytes().decode("utf8").strip()
         try:
-            self.zmq_pub.send_string(item + DELIM, flags=zmq.NOBLOCK)
+            data = item + DELIM
+            data = self.context.compress(data.encode("utf8"))
+            self.zmq_pub.send(data, flags=zmq.NOBLOCK)
         except zmq.ZMQError as e:
             logging.error(str(e))
diff --git a/gamutrflib/gamutrflib/zmqbucket.py b/gamutrflib/gamutrflib/zmqbucket.py
index 034c1978..64b9b906 100644
--- a/gamutrflib/gamutrflib/zmqbucket.py
+++ b/gamutrflib/gamutrflib/zmqbucket.py
@@ -81,11 +81,12 @@ def fft_proxy(
     tmp_buff_file = buff_file.replace(tmp_buff_file, "." + tmp_buff_file)
     if os.path.exists(tmp_buff_file):
         os.remove(tmp_buff_file)
-    context = zstandard.ZstdCompressor()
+    compress_context = zstandard.ZstdCompressor()
+    decompress_context = zstandard.ZstdDecompressor()
     shutdown = False
     while not shutdown:
         with open(tmp_buff_file, "wb") as zbf:
-            with context.stream_writer(zbf) as bf:
+            with compress_context.stream_writer(zbf) as bf:
                 while not shutdown:
                     shutdown = live_file is not None and not live_file.exists()
                     try:
@@ -93,6 +94,11 @@ def fft_proxy(
                     except zmq.error.Again:
                         time.sleep(poll_timeout)
                         continue
+                    # gamutrf might send compressed message
+                    try:
+                        sock_txt = decompress_context.decompress(sock_txt)
+                    except zstandard.ZstdError:
+                        pass
                     bf.write(sock_txt)
                     now = time.time()
                     if (
@@ -122,7 +128,6 @@ def __init__(
         self.addr = addr
         self.port = port
         self.context = zstandard.ZstdDecompressor()
-        self.txt_buf = ""
         self.fftbuffer = None
         self.scan_configs = {}
         self.proxy_result = executor.submit(
@@ -138,30 +143,20 @@ def healthy(self):
     def __str__(self):
         return f"ZmqScanner on {self.addr}:{self.port}"
 
-    def read_buff_file(self):
+    def read_buff_file(self, log):
+        lines = None
         if os.path.exists(self.buff_file):
             self.info("read %u bytes of FFT data" % os.stat(self.buff_file).st_size)
             with self.context.stream_reader(open(self.buff_file, "rb")) as bf:
-                self.txt_buf += bf.read().decode("utf8")
-            os.remove(self.buff_file)
-            return True
-        return False
-
-    def txtbuf_to_lines(self, log):
-        lines = self.txt_buf.splitlines()
-        if len(lines) > 1:
-            if self.txt_buf.endswith("\n"):
-                if log:
-                    log.write(self.txt_buf)
-                self.txt_buf = ""
-            elif lines:
-                last_line = lines[-1]
+                txt_buf = bf.read().decode("utf8")
                 if log:
-                    log.write(self.txt_buf[: -len(last_line)])
-                self.txt_buf = last_line
-                lines = lines[:-1]
-            return lines
-        return None
+                    log.write(txt_buf)
+                try:
+                    lines = [json.loads(line) for line in txt_buf.splitlines() if line]
+                except json.decoder.JSONDecodeError as err:
+                    logging.info("%s: %s", err, txt_buf)
+            os.remove(self.buff_file)
+        return lines
 
     def read_new_frame_df(self, df, discard_time):
         frame_df = None
@@ -194,9 +189,7 @@ def read_new_frame_df(self, df, discard_time):
     def lines_to_df(self, lines):
         try:
             records = []
-            for line in lines:
-                line = line.strip()
-                json_record = json.loads(line)
+            for json_record in lines:
                 ts = float(json_record["ts"])
                 sweep_start = float(json_record["sweep_start"])
                 total_tune_count = int(json_record["total_tune_count"])
@@ -223,12 +216,11 @@ def lines_to_df(self, lines):
     def read_buff(self, log, discard_time):
         scan_config = None
         frame_df = None
-        if self.read_buff_file():
-            lines = self.txtbuf_to_lines(log)
-            if lines:
-                df = self.lines_to_df(lines)
-                if df is not None:
-                    scan_config, frame_df = self.read_new_frame_df(df, discard_time)
+        lines = self.read_buff_file(log)
+        if lines:
+            df = self.lines_to_df(lines)
+            if df is not None:
+                scan_config, frame_df = self.read_new_frame_df(df, discard_time)
         return scan_config, frame_df