diff --git a/src/main.rs b/src/main.rs
index bbce7ab..9bdff31 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -130,7 +130,12 @@ struct Register {
     #[serde(skip_serializing_if = "Option::is_none")]
     parse: Option<RegisterParse>,
 
-    #[serde(with = "humantime_serde", default = "default_register_interval")]
+    #[serde(
+        with = "humantime_serde",
+        default = "default_register_interval",
+        alias = "period",
+        alias = "duration"
+    )]
     interval: Duration,
 }
 
@@ -204,7 +209,7 @@ async fn main() {
     // Modbus connection registry
     let registry_handle = {
         let prefix = args.mqtt_topic_prefix.clone();
-        tokio::spawn(async move { connection_registry(prefix, dispatcher_tx, registry_rx).await })
+        tokio::spawn(connection_registry(prefix, dispatcher_tx, registry_rx))
     };
 
     // MQTT Dispatcher
@@ -220,9 +225,7 @@ async fn main() {
         }
         options.set_keep_alive(Duration::from_secs(5)); // TODO: make this configurable
 
-        tokio::spawn(async move {
-            mqtt_dispatcher(options, prefix, registry_tx, dispatcher_rx).await;
-        })
+        tokio::spawn(mqtt_dispatcher(options, prefix, registry_tx, dispatcher_rx))
     };
 
     registry_handle.await.unwrap();
@@ -362,9 +365,7 @@ async fn connection_registry(
 
                 db.insert(
                     id.clone(),
-                    tokio::spawn(async move {
-                        handle_connect(dispatcher, id, prefix, details).await;
-                    }),
+                    tokio::spawn(handle_connect(dispatcher, id, prefix, details)),
                 );
             }
             _ => println!("unimplemented"),
@@ -372,7 +373,7 @@ async fn connection_registry(
     }
 }
 
-#[derive(Debug)]
+#[derive(Clone, Copy, Debug)]
 enum ModbusReadType {
     Input,
     Hold,
@@ -396,7 +397,6 @@ async fn handle_connect(
     match serde_json::from_slice::<Connect>(&payload) {
         Ok(connect) => {
             let unit = connect.unit;
-            // println!("{:?}", connect);
 
             let mut modbus = match connect.settings {
                 ModbusProto::Tcp { ref host, port } => {
@@ -464,73 +464,30 @@ async fn handle_connect(
 
             use itertools::Itertools;
             for (duration, registers) in &connect.input.into_iter().group_by(|r| r.interval) {
-                let registers: Vec<Register> = registers.collect();
-                let id = id.clone();
-                let modbus = modbus_tx.clone();
-                let dispatcher = dispatcher.clone();
-                let topic_prefix = topic_prefix.clone();
+                let registers_prefix = format!("{}/input/{}", topic_prefix, id);
 
-                tokio::spawn(async move {
-                    let mut interval = tokio::time::interval(duration);
-                    interval.set_missed_tick_behavior(MissedTickBehavior::Delay);
+                tokio::spawn(watch_registers(
+                    ModbusReadType::Input,
+                    connect.address_offset,
+                    duration,
+                    registers.collect(),
+                    modbus_tx.clone(),
+                    dispatcher.clone(),
+                    registers_prefix,
+                ));
+            }
+            for (duration, registers) in &connect.hold.into_iter().group_by(|r| r.interval) {
+                let registers_prefix = format!("{}/hold/{}", topic_prefix, id);
 
-                    loop {
-                        interval.tick().await;
-                        for ref r in registers.iter() {
-                            let address = if connect.address_offset >= 0 {
-                                r.range.address.checked_add(connect.address_offset as u16)
-                            } else {
-                                r.range
-                                    .address
-                                    .checked_sub(connect.address_offset.unsigned_abs() as u16)
-                            };
-                            if let Some(address) = address {
-                                println!("Polling {}", address);
-
-                                let (tx, rx) = oneshot::channel();
-
-                                modbus
-                                    .send(ModbusCommand::Read(
-                                        ModbusReadType::Input,
-                                        address,
-                                        r.range.count.into(),
-                                        tx,
-                                    ))
-                                    .await
-                                    .unwrap();
-
-                                let values = rx.await.unwrap().unwrap();
-
-                                let payload =
-                                    serde_json::to_vec(&json!({ "raw": values, })).unwrap();
-
-                                dispatcher
-                                    .send(DispatchCommand::Publish {
-                                        topic: format!(
-                                            "{}/registers/{}/{}",
-                                            topic_prefix, id, r.range.address
-                                        ),
-                                        payload: payload.clone(),
-                                    })
-                                    .await
-                                    .unwrap();
-
-                                if let Some(name) = &r.name {
-                                    dispatcher
-                                        .send(DispatchCommand::Publish {
-                                            topic: format!(
-                                                "{}/registers/{}/{}",
-                                                topic_prefix, id, name
-                                            ),
-                                            payload: payload,
-                                        })
-                                        .await
-                                        .unwrap();
-                                }
-                            }
-                        }
-                    }
-                });
+                tokio::spawn(watch_registers(
+                    ModbusReadType::Hold,
+                    connect.address_offset,
+                    duration,
+                    registers.collect(),
+                    modbus_tx.clone(),
+                    dispatcher.clone(),
+                    registers_prefix,
+                ));
             }
         }
         Err(err) => {
@@ -549,20 +506,65 @@ async fn handle_connect(
     }
 }
 
-// async fn requests(client: AsyncClient) {
-//     client
-//         .subscribe("hello/world", QoS::AtMostOnce)
-//         .await
-//         .unwrap();
+async fn watch_registers(
+    read_type: ModbusReadType,
+    address_offset: i8,
+    duration: Duration,
+    registers: Vec<Register>,
+    modbus: mpsc::Sender<ModbusCommand>,
+    dispatcher: mpsc::Sender<DispatchCommand>,
+    registers_prefix: String,
+) {
+    let mut interval = tokio::time::interval(duration);
+    interval.set_missed_tick_behavior(MissedTickBehavior::Delay);
 
-//     for i in 1..=10 {
-//         client
-//             .publish("hello/world", QoS::ExactlyOnce, false, vec![1; i])
-//             .await
-//             .unwrap();
+    loop {
+        interval.tick().await;
+        for ref r in registers.iter() {
+            let address = if address_offset >= 0 {
+                r.range.address.checked_add(address_offset as u16)
+            } else {
+                r.range
+                    .address
+                    .checked_sub(address_offset.unsigned_abs() as u16)
+            };
+            if let Some(address) = address {
+                println!("Polling {:?} {}", read_type, address);
 
-//         time::sleep(Duration::from_secs(1)).await;
-//     }
+                let (tx, rx) = oneshot::channel();
 
-//     time::sleep(Duration::from_secs(120)).await;
-// }
+                modbus
+                    .send(ModbusCommand::Read(
+                        read_type,
+                        address,
+                        r.range.count.into(),
+                        tx,
+                    ))
+                    .await
+                    .unwrap();
+
+                let values = rx.await.unwrap().unwrap();
+
+                let payload = serde_json::to_vec(&json!({ "raw": values, })).unwrap();
+
+                dispatcher
+                    .send(DispatchCommand::Publish {
+                        topic: format!("{}/{}", registers_prefix, r.range.address),
+                        payload: payload.clone(),
+                    })
+                    .await
+                    .unwrap();
+
+                if let Some(name) = &r.name {
+                    dispatcher
+                        .send(DispatchCommand::Publish {
+                            topic: format!("{}/{}", registers_prefix, name),
+                            payload: payload,
+                        })
+                        .await
+                        .unwrap();
+                }
+            }
+        }
+    }
+}