diff --git a/src/main.rs b/src/main.rs
index 5c23fe6..a05b447 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -177,6 +177,116 @@ async fn main(spawner: Spawner) -> ! {
         screen
     };
 
+    {
+        let _ = screen
+            .update(screen::ScreenState::Initial)
+            .inspect_err(log_screen_error);
+        embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+
+        #[cfg(feature = "spat")]
+        {
+            let _ = screen
+                .update(screen::ScreenState::GlosaSearching(
+                    applogic::GlosaSearching {
+                        known_intersection_ids: alloc::vec![123],
+                    },
+                ))
+                .inspect_err(log_screen_error);
+            embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+            let _ = screen
+                .update(screen::ScreenState::GlosaFound(applogic::GlosaFound {
+                    intersection_id: 1234,
+                    approach_id: Some(42),
+                }))
+                .inspect_err(log_screen_error);
+            embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+            let _ = screen
+                .update(screen::ScreenState::GlosaLocked(
+                    applogic::GlosaSignalInfo {
+                        intersection_id: 1234,
+                        signal_groups: alloc::vec![
+                            applogic::SignalGroupData {
+                                phase: applogic::SignalPhase::Red,
+                                maneuver: applogic::v2x::map::Maneuvers {
+                                    left_allowed: true,
+                                    staight_allowed: false,
+                                    right_allowed: false
+                                },
+                                timing: Some(applogic::TimingData {
+                                    min_end_sec: 23,
+                                    likely_end_sec: None,
+                                    max_end_sec: None
+                                }),
+                                usages: alloc::vec![applogic::v2x::map::UsageType::Vehicle]
+                            },
+                            applogic::SignalGroupData {
+                                phase: applogic::SignalPhase::Red,
+                                maneuver: applogic::v2x::map::Maneuvers {
+                                    left_allowed: true,
+                                    staight_allowed: false,
+                                    right_allowed: false
+                                },
+                                timing: Some(applogic::TimingData {
+                                    min_end_sec: 23,
+                                    likely_end_sec: None,
+                                    max_end_sec: None
+                                }),
+                                usages: alloc::vec![applogic::v2x::map::UsageType::Vehicle]
+                            }
+                        ],
+                    },
+                ))
+                .inspect_err(log_screen_error);
+            embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+
+            let _ = screen
+                .update(screen::ScreenState::GlosaLocked(
+                    applogic::GlosaSignalInfo {
+                        intersection_id: 1234,
+                        signal_groups: alloc::vec![applogic::SignalGroupData {
+                            phase: applogic::SignalPhase::Red,
+                            maneuver: applogic::v2x::map::Maneuvers {
+                                left_allowed: true,
+                                staight_allowed: false,
+                                right_allowed: false
+                            },
+                            timing: Some(applogic::TimingData {
+                                min_end_sec: 23,
+                                likely_end_sec: Some(24),
+                                max_end_sec: Some(42)
+                            }),
+                            usages: alloc::vec![
+                                applogic::v2x::map::UsageType::Vehicle,
+                                applogic::v2x::map::UsageType::Bike,
+                            ]
+                        }],
+                    },
+                ))
+                .inspect_err(log_screen_error);
+            embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+        }
+
+        #[cfg(feature = "denm")]
+        {
+            use c_its_parser::standards::cdd_2_2_1::etsi_its_cdd::EmergencyVehicleApproachingSubCauseCode;
+            let _ = screen
+                .update(screen::ScreenState::DenmWarning(
+                    // c_its_parser::standards::cdd_2_2_1::etsi_its_cdd::CauseCodeChoice::emergencyVehicleApproaching95(0.into()),
+                    c_its_parser::standards::cdd_2_2_1::etsi_its_cdd::etsi_its_cdd::CauseCodeChoice::emergencyVehicleApproaching95(EmergencyVehicleApproachingSubCauseCode(0)),
+                ))
+                .inspect_err(log_screen_error);
+            embassy_time::Timer::after(embassy_time::Duration::from_secs(2)).await;
+
+            // try to reset screen for 4 more seconds
+            for _ in 0..4 {
+                let _ = screen
+                    .update(screen::ScreenState::Initial)
+                    .inspect_err(log_screen_error);
+                embassy_time::Timer::after(embassy_time::Duration::from_secs(1)).await;
+            }
+        }
+    }
+
     // Setup UART I/O channel
     #[cfg(feature = "uart")]
     setup_uart0(