diff --git a/receiver/src/comm.rs b/receiver/src/comm.rs
index c16f654..32b3347 100644
--- a/receiver/src/comm.rs
+++ b/receiver/src/comm.rs
@@ -4,7 +4,7 @@ extern crate rumqttc as mqtt;
 
 use serde::{Deserialize, Serialize};
 
-pub type TimeCallback = fn(u32) -> ();
+pub type TimeCallback = fn(u32) -> Result<(),()>;
 
 #[derive(Serialize, Deserialize, PartialEq)]
 enum MqttMessageKind {
@@ -95,7 +95,10 @@ impl Comm {
             return;
         }
 
-        (self.handler)(msg.time);
+        if (self.handler)(msg.time).is_err() {
+            println!("[WARN] error in time handler -> not sending confirmation");
+            return;
+        }
 
         let reply = MqttMessage {
             id: msg.id,
diff --git a/receiver/src/keyboard.rs b/receiver/src/keyboard.rs
index eb4dcc3..d6d7e01 100644
--- a/receiver/src/keyboard.rs
+++ b/receiver/src/keyboard.rs
@@ -1,20 +1,22 @@
 #[cfg(target_family = "unix")]
 use enigo::{KeyboardControllable};
 
+#[cfg(target_family = "unix")]
 pub fn type_text(text: &str) {
     enigo::Enigo::default().key_sequence(text);
 }
 
+#[cfg(target_family = "unix")]
 pub fn click_tab() {
     enigo::Enigo::default().key_click(enigo::Key::Tab);
 }
 
 #[cfg(target_family = "windows")]
-pub fn type_text(&self, text: &str) {
-    simulate::type_str(text);
+pub fn type_text(text: &str) -> Result<(),()>{
+    simulate::type_str(text).map_err(|_| ())
 }
 
 #[cfg(target_family = "windows")]
-pub fn click_tab(&self) {
-    simulate::send(simulate::Key::Tab);
+pub fn click_tab() -> Result<(),()> {
+    simulate::send(simulate::Key::Tab).map_err(|_| ())
 }
\ No newline at end of file
diff --git a/receiver/src/main.rs b/receiver/src/main.rs
index 6a05b8e..4516dff 100644
--- a/receiver/src/main.rs
+++ b/receiver/src/main.rs
@@ -66,14 +66,15 @@ fn millis_to_string(millis: u32) -> String {
     formatted.replace(".", ",")
 }
 
-fn handle_time(time: u32) {
+fn handle_time(time: u32) -> Result<(),()> {
     println!("Got time: {}", time);
     let time_with_comma = millis_to_string(time);
 
     println!("Trying to type {time_with_comma}");
-    keyboard::type_text(&time_with_comma);
-    keyboard::click_tab();
-    keyboard::click_tab();
+    keyboard::type_text(&time_with_comma)?;
+    keyboard::click_tab()?;
+    keyboard::click_tab()?;
+    Ok(())
 }
 
 fn main() {