add PowerSensor Screen (#142)

Author: clintpurser

example/viam_robot_example_app/lib/main.dart

@@ -5,14 +5,7 @@ import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 import 'package:viam_sdk/viam_sdk.dart';
 import 'package:viam_sdk/widgets.dart';
 
-import 'screens/base.dart';
-import 'screens/board.dart';
-import 'screens/gripper.dart';
-import 'screens/motor.dart';
-import 'screens/movement_sensor.dart';
-import 'screens/sensor.dart';
-import 'screens/servo.dart';
-import 'screens/stream.dart';
+import 'screens/screens.dart';
 
 void main() async {
   await dotenv.load();
@@ -148,6 +141,7 @@ class _MyHomePageState extends State<MyHomePage> {
       Gripper.subtype.resourceSubtype,
       Motor.subtype.resourceSubtype,
       MovementSensor.subtype.resourceSubtype,
+      PowerSensor.subtype.resourceSubtype,
       Sensor.subtype.resourceSubtype,
       Servo.subtype.resourceSubtype,
     ].contains(rname.subtype);
@@ -180,6 +174,9 @@ class _MyHomePageState extends State<MyHomePage> {
     if (rname.subtype == Motor.subtype.resourceSubtype) {
       return MotorScreen(motor: Motor.fromRobot(_robot, rname.name), resourceName: rname);
     }
+    if (rname.subtype == PowerSensor.subtype.resourceSubtype) {
+      return PowerSensorScreen(powerSensor: PowerSensor.fromRobot(_robot, rname.name), resourceName: rname);
+    }
     if (rname.subtype == Servo.subtype.resourceSubtype) {
       return ServoScreen(servo: Servo.fromRobot(_robot, rname.name), resourceName: rname);
     }

example/viam_robot_example_app/lib/screens/power_sensor.dart

@@ -0,0 +1,60 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
+import 'package:viam_sdk/viam_sdk.dart';
+import 'package:viam_sdk/widgets.dart';
+
+class PowerSensorScreen extends StatelessWidget {
+  final PowerSensor powerSensor;
+  final ResourceName resourceName;
+
+  const PowerSensorScreen({super.key, required this.powerSensor, required this.resourceName});
+
+  Future<Map<String, dynamic>> _getReadings({Map<String, dynamic>? extra}) async {
+    final Map<String, dynamic> readings = {};
+    try {
+      final voltage = await powerSensor.voltage();
+      readings['voltage (volts)'] = voltage.volts;
+    } catch (exception) {
+      // Do nothing on error
+    }
+
+    try {
+      final power = await powerSensor.power();
+      readings['power (watts)'] = power;
+    } catch (exception) {
+      // Do nothing on error
+    }
+
+    try {
+      final current = await powerSensor.current();
+      readings['current (amps)'] = current.amperes;
+    } catch (exception) {
+      // Do nothing on error
+    }
+
+    return readings;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return PlatformScaffold(
+      appBar: PlatformAppBar(
+        title: Text(resourceName.name.toUpperCase()),
+      ),
+      iosContentPadding: true,
+      body: Center(
+        child: Column(
+          children: [
+            const Padding(padding: EdgeInsets.symmetric(vertical: 8, horizontal: 0)),
+            PlatformText(
+              '${resourceName.namespace}:${resourceName.type}:${resourceName.subtype}/${resourceName.name}',
+              style: const TextStyle(fontWeight: FontWeight.w300),
+            ),
+            const Padding(padding: EdgeInsets.symmetric(vertical: 8, horizontal: 0)),
+            ViamRefreshableDataTable(getData: _getReadings),
+          ],
+        ),
+      ),
+    );
+  }
+}

example/viam_robot_example_app/lib/screens/screens.dart

@@ -0,0 +1,9 @@
+export 'base.dart';
+export 'board.dart';
+export 'gripper.dart';
+export 'motor.dart';
+export 'movement_sensor.dart';
+export 'power_sensor.dart';
+export 'sensor.dart';
+export 'servo.dart';
+export 'stream.dart';

lib/src/resource/registry.dart

@@ -16,6 +16,8 @@ import '../components/motor/client.dart';
 import '../components/motor/motor.dart';
 import '../components/movement_sensor/client.dart';
 import '../components/movement_sensor/movement_sensor.dart';
+import '../components/power_sensor/client.dart';
+import '../components/power_sensor/power_sensor.dart';
 import '../components/sensor/client.dart';
 import '../components/sensor/sensor.dart';
 import '../components/servo/client.dart';
@@ -57,6 +59,7 @@ class Registry {
     registerSubtype(ResourceRegistration(Gripper.subtype, (name, channel) => GripperClient(name, channel)));
     registerSubtype(ResourceRegistration(Motor.subtype, (name, channel) => MotorClient(name, channel)));
     registerSubtype(ResourceRegistration(MovementSensor.subtype, (name, channel) => MovementSensorClient(name, channel)));
+    registerSubtype(ResourceRegistration(PowerSensor.subtype, (name, channel) => PowerSensorClient(name, channel)));
     registerSubtype(ResourceRegistration(Sensor.subtype, (name, channel) => SensorClient(name, channel)));
     registerSubtype(ResourceRegistration(Servo.subtype, (name, channel) => ServoClient(name, channel)));
   }

lib/viam_sdk.dart

@@ -22,6 +22,8 @@ export 'src/components/motor/client.dart';
 export 'src/components/motor/motor.dart';
 export 'src/components/movement_sensor/client.dart';
 export 'src/components/movement_sensor/movement_sensor.dart';
+export 'src/components/power_sensor/client.dart';
+export 'src/components/power_sensor/power_sensor.dart';
 export 'src/components/sensor/client.dart';
 export 'src/components/sensor/sensor.dart';
 export 'src/components/servo/client.dart';