diff --git a/sensgw/protocols/prologix.py b/sensgw/protocols/prologix.py
index e8d63f7..5ca4767 100644
--- a/sensgw/protocols/prologix.py
+++ b/sensgw/protocols/prologix.py
@@ -133,11 +133,21 @@ class PrologixEndpointLoop:
             from pymeasure.adapters import PrologixAdapter  # type: ignore
 
             res = self.endpoint.conn["resource"]
-            to_ms = int(self.endpoint.conn.get("gpib_read_timeout_ms", 500))
-            log.info(f"gpib_read_timeout_ms set to {to_ms}")
+            gpib_to_ms = int(self.endpoint.conn.get("gpib_read_timeout_ms", 5000))
+            serial_to_ms = int(
+                self.endpoint.conn.get("serial_timeout_ms", gpib_to_ms + 2000)
+            )
+
+            log.info(f"gpib_read_timeout_ms set to {gpib_to_ms}")
+            log.info(f"serial_timeout_ms set to {serial_to_ms}")
 
             # auto=False gives us manual control over addressing
-            self._adapter = PrologixAdapter(res, gpib_read_timeout=to_ms, auto=False)
+            self._adapter = PrologixAdapter(
+                res,
+                gpib_read_timeout=gpib_to_ms,
+                serial_timeout=serial_to_ms,
+                auto=False,
+            )
 
             try:
                 self._adapter.flush_read_buffer()