diff --git a/rust/src/hal/battery.rs b/rust/src/hal/battery.rs
index 0e51b78..8896e7f 100644
--- a/rust/src/hal/battery.rs
+++ b/rust/src/hal/battery.rs
@@ -62,7 +62,8 @@ pub struct NoBatteryMonitor {}
 #[async_trait]
 impl BatteryInteraction for NoBatteryMonitor {
     async fn state_charge_percent(&mut self) -> FatResult<f32> {
-        Err(FatError::NoBatteryMonitor)
+        // No monitor configured: assume full battery for lightstate logic
+        Ok(100.0)
     }
 
     async fn remaining_milli_ampere_hour(&mut self) -> FatResult<u16> {
diff --git a/rust/src/hal/esp.rs b/rust/src/hal/esp.rs
index 869470d..c3c106b 100644
--- a/rust/src/hal/esp.rs
+++ b/rust/src/hal/esp.rs
@@ -336,7 +336,7 @@ impl Esp<'_> {
     }
     pub(crate) fn clear_low_voltage_in_cycle(&mut self) {
         unsafe {
-            LOW_VOLTAGE_DETECTED = 1;
+            LOW_VOLTAGE_DETECTED = 0;
         }
     }
 
@@ -547,7 +547,8 @@ impl Esp<'_> {
         if duration_in_ms == 0 {
             software_reset();
         } else {
-            let timer = TimerWakeupSource::new(core::time::Duration::from_millis(duration_in_ms));
+            ///let timer = TimerWakeupSource::new(core::time::Duration::from_millis(duration_in_ms));
+            let timer = TimerWakeupSource::new(core::time::Duration::from_millis(5000));
             let mut wake_pins: [(&mut dyn RtcPinWithResistors, WakeupLevel); 1] = [(&mut self.wake_gpio1, WakeupLevel::Low)];
             let ext1 = esp_hal::rtc_cntl::sleep::Ext1WakeupSource::new(&mut wake_pins);
             rtc.sleep_deep(&[&timer, &ext1]);
diff --git a/rust/src/hal/mod.rs b/rust/src/hal/mod.rs
index 9634ed4..65ed891 100644
--- a/rust/src/hal/mod.rs
+++ b/rust/src/hal/mod.rs
@@ -422,7 +422,9 @@ impl PlantHal {
                 SocResetReason::CoreEfuseCrc => "core efuse crc",
                 SocResetReason::CoreUsbUart => {
                     //TODO still required? or via button ignore? to_config_mode = true;
+                    to_config_mode = true;
                     "core usb uart"
+
                 }
                 SocResetReason::CoreUsbJtag => "core usb jtag",
                 SocResetReason::Cpu0JtagCpu => "cpu0 jtag cpu",
diff --git a/rust/src/hal/v4_hal.rs b/rust/src/hal/v4_hal.rs
index 9a78250..005da27 100644
--- a/rust/src/hal/v4_hal.rs
+++ b/rust/src/hal/v4_hal.rs
@@ -30,6 +30,22 @@ use measurements::{Current, Voltage};
 use pca9535::{GPIOBank, Pca9535Immediate, StandardExpanderInterface};
 use crate::log::{LogMessage, LOG_ACCESS};
 
+// Minimal esp-idf equivalent for gpio_hold on esp32c6 via ROM functions
+extern "C" {
+    fn gpio_pad_hold(gpio_num: u32);
+    fn gpio_pad_unhold(gpio_num: u32);
+}
+
+#[inline(always)]
+fn hold_enable(gpio_num: u8) {
+    unsafe { gpio_pad_hold(gpio_num as u32) }
+}
+
+#[inline(always)]
+fn hold_disable(gpio_num: u8) {
+    unsafe { gpio_pad_unhold(gpio_num as u32) }
+}
+
 const MPPT_CURRENT_SHUNT_OHMS: f64 = 0.05_f64;
 const TWAI_BAUDRATE: twai::BaudRate = twai::BaudRate::B125K;
 
@@ -356,10 +372,10 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
     }
 
     async fn light(&mut self, enable: bool) -> Result<(), FatError> {
-        // unsafe { gpio_hold_dis(self.light.pin()) };
-         self.light.set_level(enable.into());
-        // unsafe { gpio_hold_en(self.light.pin()) };
-         Ok(())
+        hold_disable(10);
+        self.light.set_level(enable.into());
+        hold_enable(10);
+        Ok(())
     }
 
     async fn pump(&mut self, plant: usize, enable: bool) -> FatResult<()> {
@@ -413,9 +429,9 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
     }
 
     async fn general_fault(&mut self, enable: bool) {
-        //FIXME unsafe { gpio_hold_dis(self.general_fault.pin()) };
+        hold_disable(23);
         self.general_fault.set_level(enable.into());
-        //FIXME unsafe { gpio_hold_en(self.general_fault.pin()) };
+        hold_enable(23);
     }
 
     async fn test(&mut self) -> Result<(), FatError> {
diff --git a/rust/src/main.rs b/rust/src/main.rs
index 77245f8..4c1cc4c 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -500,12 +500,12 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         .await
         .unwrap_or(BatteryState::Unknown);
 
+
     info!("Battery state is {:?}", battery_state);
     let mut light_state = LightState {
         enabled: board.board_hal.get_config().night_lamp.enabled,
         ..Default::default()
     };
-    info!("Light state is {:?}", light_state);
     if light_state.enabled {
         light_state.is_day = is_day;
         light_state.out_of_work_hour = !in_time_range(
@@ -527,6 +527,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
                 .into()
         {
             board.board_hal.get_esp().set_low_voltage_in_cycle();
+            info!("Set low voltage in cycle");
         } else if state_of_charge
             > board
                 .board_hal
@@ -536,6 +537,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
                 .into()
         {
             board.board_hal.get_esp().clear_low_voltage_in_cycle();
+            info!("Clear low voltage in cycle");
         }
         light_state.battery_low = board.board_hal.get_esp().low_voltage_in_cycle();