diff --git a/pyomnilogic_local/cli/cli.py b/pyomnilogic_local/cli/cli.py
index ab05751..7749cff 100644
--- a/pyomnilogic_local/cli/cli.py
+++ b/pyomnilogic_local/cli/cli.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+import logging
 
 import click
 
@@ -14,7 +15,8 @@
 @click.option("--host", default="127.0.0.1", help="Hostname or IP address of OmniLogic system (default: 127.0.0.1)")
 @click.option("--port", default=10444, help="Port number of OmniLogic system (default: 10444)")
 @click.option("--timeout", default=5, help="Timeout duration for connecting to OmniLogic system in seconds (default: 5)")
-def entrypoint(ctx: click.Context, host: str, port: int, timeout: int) -> None:
+@click.option("--debug", is_flag=True, default=False, help="Enable debug logging")
+def entrypoint(ctx: click.Context, host: str, port: int, timeout: int, debug: bool) -> None:
     """OmniLogic Local Control - Command line interface for Hayward pool controllers.
 
     This CLI provides local control and monitoring of Hayward OmniLogic and OmniHub
@@ -37,6 +39,9 @@ def entrypoint(ctx: click.Context, host: str, port: int, timeout: int) -> None:
     """
     ctx.ensure_object(dict)
 
+    if debug:
+        logging.basicConfig(level=logging.DEBUG)
+
     # Store the host for later connection, but don't connect yet
     ctx.obj["HOST"] = host
     ctx.obj["PORT"] = port
diff --git a/shell.nix b/shell.nix
index fa88dd3..e0c59d5 100644
--- a/shell.nix
+++ b/shell.nix
@@ -28,6 +28,7 @@ in
       nodejs
       python314
       uv
+      jq
     ];
 
   runScript = "bash --rcfile ${shellInit}";