diff --git a/backend/src/main/java/net/miarma/contaminus/server/DataLayerAPIVerticle.java b/backend/src/main/java/net/miarma/contaminus/server/DataLayerAPIVerticle.java
index 01169b1..bb0c3ef 100644
--- a/backend/src/main/java/net/miarma/contaminus/server/DataLayerAPIVerticle.java
+++ b/backend/src/main/java/net/miarma/contaminus/server/DataLayerAPIVerticle.java
@@ -19,13 +19,16 @@ import io.vertx.ext.web.handler.CorsHandler;
 import io.vertx.jdbcclient.JDBCPool;
 import net.miarma.contaminus.common.ConfigManager;
 import net.miarma.contaminus.common.Constants;
+import net.miarma.contaminus.common.SingleJsonResponse;
 import net.miarma.contaminus.database.DatabaseManager;
 import net.miarma.contaminus.database.QueryBuilder;
+import net.miarma.contaminus.database.entities.Actuator;
 import net.miarma.contaminus.database.entities.Device;
 import net.miarma.contaminus.database.entities.DeviceLatestValuesView;
 import net.miarma.contaminus.database.entities.DevicePollutionMap;
 import net.miarma.contaminus.database.entities.DeviceSensorHistory;
 import net.miarma.contaminus.database.entities.DeviceSensorValue;
+import net.miarma.contaminus.database.entities.Group;
 import net.miarma.contaminus.database.entities.Sensor;
 
 /*
@@ -151,35 +154,149 @@ public class DataLayerAPIVerticle extends AbstractVerticle {
 	}
 	
 	private void getAllSensors(RoutingContext context) {
-		context.response().end("TODO");
+		String query = QueryBuilder
+			.select(Sensor.class)
+			.build();
+		
+		dbManager.execute(query, Sensor.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(onSuccess));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void getSensorById(RoutingContext context) {
-		context.response().end("TODO");
+		Integer sensorId = Integer.parseInt(context.request().getParam("sensorId"));
+		Sensor sensor = new Sensor(sensorId, null, null, null, null, null);
+		
+		String query = QueryBuilder
+			.select(sensor)
+			.build();
+		
+		dbManager.execute(query, Sensor.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(onSuccess));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void addSensor(RoutingContext context) {
-		context.response().end("TODO");
+		JsonObject body = context.body().asJsonObject();
+		Sensor sensor = gson.fromJson(body.toString(), Sensor.class);
+		
+		String query = QueryBuilder
+			.insert(sensor)
+			.build();
+		
+		dbManager.execute(query, Sensor.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(SingleJsonResponse.of("Sensor added successfully")));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void updateSensor(RoutingContext context) {
-		context.response().end("TODO");
+		JsonObject body = context.body().asJsonObject();
+		Sensor sensor = gson.fromJson(body.toString(), Sensor.class);
+		
+		String query = QueryBuilder
+			.update(sensor)
+			.build();
+		
+		dbManager.execute(query, Sensor.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(SingleJsonResponse.of("Sensor updated successfully")));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void getAllActuators(RoutingContext context) {
-		context.response().end("TODO");
+		String query = QueryBuilder
+			.select(Actuator.class)
+			.build();
+		
+		dbManager.execute(query, Actuator.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(onSuccess));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void getActuatorById(RoutingContext context) {
-		context.response().end("TODO");
+		Integer actuatorId = Integer.parseInt(context.request().getParam("actuatorId"));
+		Actuator actuator = new Actuator(actuatorId, null, null, null);
+		
+		String query = QueryBuilder
+			.select(actuator)
+			.build();
+		
+		dbManager.execute(query, Actuator.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(onSuccess));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void addActuator(RoutingContext context) {
-		context.response().end("TODO");
+		JsonObject body = context.body().asJsonObject();
+		Actuator actuator = gson.fromJson(body.toString(), Actuator.class);
+		
+		String query = QueryBuilder
+			.insert(actuator)
+			.build();
+		
+		dbManager.execute(query, Actuator.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(SingleJsonResponse.of("Actuator added successfully")));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 	
 	private void updateActuator(RoutingContext context) {
-		context.response().end("TODO");
+		JsonObject body = context.body().asJsonObject();
+		Actuator actuator = gson.fromJson(body.toString(), Actuator.class);
+		
+		String query = QueryBuilder
+			.update(actuator)
+			.build();
+		
+		dbManager.execute(query, Actuator.class,
+			onSuccess -> {
+				context.response()
+					.putHeader("content-type", "application/json; charset=utf-8")
+					.end(gson.toJson(SingleJsonResponse.of("Actuator updated successfully")));
+			},
+			onFailure -> {
+				context.fail(500, onFailure);
+			});
 	}
 		
 	private void getLatestValuesView(RoutingContext context) {