sensor graphing improvement

lib/towerops_web/live/device_live/show.ex

@@ -217,7 +217,8 @@ defmodule ToweropsWeb.DeviceLive.Show do
 
     storage_sensors = Enum.filter(non_transceiver_sensors, &(&1.sensor_type in ["disk_usage"]))
 
-    count_sensors = Enum.filter(non_transceiver_sensors, &(&1.sensor_type == "count"))
+    # Include various counter/gauge sensor types in the Counters section
+    count_sensors = Enum.filter(non_transceiver_sensors, &counter_sensor?/1)
 
     # Wireless sensors (frequency, power, rssi, ccq, etc.)
     wireless_sensors = Enum.filter(non_transceiver_sensors, &wireless_sensor?/1)
@@ -829,4 +830,17 @@ defmodule ToweropsWeb.DeviceLive.Show do
       "utilization"
     ]
   end
+
+  # Counter sensors include various count and gauge types
+  # (connections, sessions, clients, DHCP leases, etc.)
+  defp counter_sensor?(sensor) do
+    sensor.sensor_type in [
+      "count",
+      "pppoe_sessions",
+      "connections",
+      "clients",
+      "leases",
+      "sessions"
+    ]
+  end
 end

lib/towerops_web/live/device_live/show.html.heex

@@ -713,7 +713,7 @@
                         <dt class="text-sm text-gray-600 dark:text-gray-400">
                           <.link
                             navigate={
-                              ~p"/devices/#{@device.id}/graph/count?sensor_id=#{sensor.id}"
+                              ~p"/devices/#{@device.id}/graph/#{sensor.sensor_type}?sensor_id=#{sensor.id}"
                             }
                             class="hover:text-blue-600 dark:hover:text-blue-400 hover:underline"
                           >

lib/towerops_web/live/graph_live/show.ex

@@ -204,7 +204,13 @@ defmodule ToweropsWeb.GraphLive.Show do
         since = get_datetime_from_range(range)
         limit = get_limit_for_range(range)
         dataset = sensor_to_dataset(sensor, since, limit)
-        Jason.encode!(%{datasets: [dataset]})
+
+        # Return nil if no data points (empty readings)
+        if Enum.empty?(dataset.data) do
+          nil
+        else
+          Jason.encode!(%{datasets: [dataset]})
+        end
     end
   end