diff --git a/Cargo.lock b/Cargo.lock
index ba855f4..bd208ae 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -139,7 +139,7 @@ checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
 name = "energyPulseCounter"
-version = "1.0.1"
+version = "1.0.2"
 dependencies = [
  "crossbeam",
  "mqtt-client",
diff --git a/Cargo.toml b/Cargo.toml
index 31894b4..752f44a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "energyPulseCounter"
-version = "1.0.1"
+version = "1.0.2"
 edition = "2021"
 
 [dependencies]
diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..eb690e2
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+cross build --target aarch64-unknown-linux-gnu --release
+# cargo build --release
+
+cp target/aarch64-unknown-linux-gnu/release/energyPulseCounter energyPulseCounter-aarch64
+# cp target/release/energyPulseCounter energyPulseCounter-x86_64
diff --git a/src/counter.rs b/src/counter.rs
index 82c2033..b2d567b 100644
--- a/src/counter.rs
+++ b/src/counter.rs
@@ -1,8 +1,9 @@
 use crossbeam::atomic::AtomicCell;
 use std::sync::Arc;
 use rppal::gpio::{Gpio, Trigger};
+use std::time::{SystemTime, UNIX_EPOCH};
 
-pub fn pulse_counter(pulses: Arc<AtomicCell<u32>>) {
+pub fn pulse_counter(pulses: Arc<AtomicCell<u32>>, last_time: Arc<AtomicCell<Option<u128>>>, power: Arc<AtomicCell<f64>>) {
     let gpio = Gpio::new().expect("failt to get gpio driver");
     let mut pulse_gpio = gpio.get(23)
                          .expect("failt to get gpio pin")
@@ -13,7 +14,18 @@ pub fn pulse_counter(pulses: Arc<AtomicCell<u32>>) {
     loop {
         match pulse_gpio.poll_interrupt(true, None) {
             Ok(_) => {
-                pulses.fetch_add(1);
+                let now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_millis();
+                let count = pulses.fetch_add(1);
+                match last_time.swap(Some(now)) {
+                    Some(last) => {
+                        // time between pulses in hours
+                        let time = f64::from(u32::try_from(now - last).unwrap()) / (60.0 * 60.0 * 1000.0);
+                        let watt = 1.0 / time;
+                        let avg = power.load();
+                        power.store(avg + (watt-avg)/f64::from(count));
+                    },
+                    None => {}
+                }
             },
             Err(_) => panic!("failt to pull interupt")
         }
diff --git a/src/main.rs b/src/main.rs
index f0e2690..9cf7211 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,7 +5,7 @@ use crossbeam::atomic::AtomicCell;
 
 mod publischer;
 mod counter;
-use publischer::PulseTx;
+use publischer::{PulseTx, Data};
 use counter::pulse_counter;
 
 #[derive(Deserialize)]
@@ -53,22 +53,31 @@ fn main() {
         Ok(conf) =>{
 
             let pulses: Arc<AtomicCell<u32>> = Arc::new(AtomicCell::new(0));
+            let last_pulse_time: Arc<AtomicCell<Option<u128>>> = Arc::new(AtomicCell::new(None));
+            let avg_power: Arc<AtomicCell<f64>> = Arc::new(AtomicCell::new(0.0));
 
             let pulses_counter = pulses.clone();
+            let last_pulse_time_counter = last_pulse_time.clone();
+            let avg_power_counter = avg_power.clone();
             
             let _ = thread::Builder::new()
                 .name("counter".to_string())
                 .spawn(move || {
-                    pulse_counter(pulses_counter);
+                    pulse_counter(pulses_counter, last_pulse_time_counter, avg_power_counter);
                 });
 
-            mqtt_client::run::<Arc<AtomicCell<u32>>, PulseTx>(
+            let config: Data = Data {
+                pulses: pulses.clone(),
+                avg_power: avg_power.clone(),
+            };
+
+            mqtt_client::run::<Data, PulseTx>(
                 conf.mqtt.host,
                 conf.mqtt.port,
                 conf.mqtt.client,
                 conf.mqtt.user,
                 conf.mqtt.pass,
-                pulses.clone()
+                config
             );
         },
         Err(_) => {}
diff --git a/src/publischer.rs b/src/publischer.rs
index 70b3f6e..761d3ad 100644
--- a/src/publischer.rs
+++ b/src/publischer.rs
@@ -6,9 +6,14 @@ use crossbeam::atomic::AtomicCell;
 use mqtt_client::{MqttMessage, Sender, Receiver, QoS};
 use mqtt_client::mqtt_client;
 
+pub struct Data {
+    pub pulses: Arc<AtomicCell<u32>>,
+    pub avg_power: Arc<AtomicCell<f64>>
+}
+
 pub struct PulseTx {
     tx: Sender<mqtt_client::MqttMessage>,
-    pulses: Arc<AtomicCell<u32>>
+    pulses: Data
 }
 
 
@@ -28,7 +33,8 @@ impl PulseTx {
                 Err(e) => 
                     println!("ERROR: message_in: clock/time/minute has invalid payload ({:?})", e),
                 Ok(_) => {
-                    let pulses = self.pulses.swap(0);
+                    let pulses = self.pulses.pulses.swap(0);
+                    let power = self.pulses.avg_power.swap(0.0);
                     self.tx({ mqtt_client::MqttMessage {
                         topic: String::from("/kees/energy/metalbox/pulses"),
                         payload: pulses.to_string(),
@@ -37,13 +43,13 @@ impl PulseTx {
                     }});
                     self.tx({ mqtt_client::MqttMessage {
                         topic: String::from("/kees/energy/metalbox/watt"),
-                        payload: (pulses * 60).to_string(),
+                        payload: power.to_string(),
                         retain: false,
                         qos: mqtt_client::QoS::AtMostOnce,
                     }});
                     self.tx({ mqtt_client::MqttMessage {
                         topic: String::from("/kees/energy/metalbox/data"),
-                        payload: format!("{{\"pulses\":{pulses},\"watt\":{}}}", pulses * 60),
+                        payload: format!("{{\"pulses\":{pulses},\"watt\":{power}}}"),
                         retain: false,
                         qos: mqtt_client::QoS::AtMostOnce,
                     }});
@@ -55,8 +61,8 @@ impl PulseTx {
 }
 
 
-impl mqtt_client::MqttTool<Arc<AtomicCell<u32>>> for PulseTx {
-    fn new(client: mqtt_client::Client, tx: Sender<mqtt_client::MqttMessage>, pulses: Arc<AtomicCell<u32>>) -> PulseTx {
+impl mqtt_client::MqttTool<Data> for PulseTx {
+    fn new(client: mqtt_client::Client, tx: Sender<mqtt_client::MqttMessage>, pulses: Data) -> PulseTx {
 
         match client.subscribe("clock/time/minute", QoS::AtMostOnce) {
             Err(e) =>