diff --git a/Core/Inc/pressure_wrapper.h b/Core/Inc/pressure_wrapper.h
index ca1de62..05a5c9a 100644
--- a/Core/Inc/pressure_wrapper.h
+++ b/Core/Inc/pressure_wrapper.h
@@ -20,7 +20,7 @@ namespace PressureConversions {
     }
 
     constexpr uint32_t voltageToPascals(uint32_t voltage_mv) noexcept {
-        return voltage_mv * 6895u / 4u * 37u / 9u;
+        return voltage_mv * 68950u / 4u * 37u / 9u;
     }
 
     constexpr uint32_t pascalsToDepthMm(uint32_t pascals) noexcept {
diff --git a/Core/Src/main.cpp b/Core/Src/main.cpp
index 4347ead..e1824a9 100644
--- a/Core/Src/main.cpp
+++ b/Core/Src/main.cpp
@@ -15,7 +15,7 @@ extern "C" {
 #include "hydrolib_bus_application_master.hpp"
 
 
-#define BUFFER_LENGTH 5 // TODO:make variable
+constexpr uint32_t kTransmitPeriodMs = 5; // 200 Hz
 
 constinit hydrv::GPIO::GPIOLow rx_pin(hydrv::GPIO::GPIOLow::GPIOA_port, 10,
                                       hydrv::GPIO::GPIOLow::GPIO_UART_RX);
@@ -105,12 +105,19 @@ int main(void) {
   /* USER CODE BEGIN 2 */
   sensor.init();
   RS.Init();
-  
+
+  uint32_t lastTransmitTick = HAL_GetTick();
+
   while (1) {
     manager.Process();
     sensor.poll();
     depth = sensor.getDepthMm();
-    master.Write(static_cast<void*>(&depth), 0, sizeof(depth));
+
+    const uint32_t now = HAL_GetTick();
+    if (now - lastTransmitTick >= kTransmitPeriodMs) {
+      lastTransmitTick = now;
+      master.Write(static_cast<void*>(&depth), 0, sizeof(depth));
+    }
   }
   /* USER CODE END 3 */
 }
@@ -129,7 +136,7 @@ void SystemClock_Config(void) {
    */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
-  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV2;
+  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;