diff --git a/FreeRTOSConfig.h b/FreeRTOSConfig.h
index c56a883..51bc917 100644
--- a/FreeRTOSConfig.h
+++ b/FreeRTOSConfig.h
@@ -109,6 +109,11 @@
 #define configCHECK_FOR_STACK_OVERFLOW           2
 #define configENABLE_BACKWARD_COMPATIBILITY      0
 
+#define configUSE_TIMERS                         1
+#define configTIMER_TASK_PRIORITY                4 // above normal
+#define configTIMER_TASK_STACK_DEPTH             128
+#define configTIMER_QUEUE_LENGTH                 4
+
 #define configTOTAL_HEAP_SIZE 4096
 
 /* Co-routine definitions. */
diff --git a/freertos.c b/freertos.c
index b19b04a..045e3e0 100644
--- a/freertos.c
+++ b/freertos.c
@@ -125,6 +125,21 @@ void vApplicationGetIdleTaskMemory( StaticTask_t **ppxIdleTaskTCBBuffer, StackTy
 }                   
 /* USER CODE END GET_IDLE_TASK_MEMORY */
 
+
+/* USER CODE BEGIN GET_IDLE_TASK_MEMORY */
+static StaticTask_t xTimersTaskTCBBuffer;
+static StackType_t xTimersStack[configTIMER_TASK_STACK_DEPTH];
+
+void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimersTaskTCBBuffer, StackType_t **ppxTimersTaskStackBuffer, uint32_t *pulTimersTaskStackSize )
+{
+  *ppxTimersTaskTCBBuffer = &xTimersTaskTCBBuffer;
+  *ppxTimersTaskStackBuffer = &xTimersStack[0];
+  *pulTimersTaskStackSize = configTIMER_TASK_STACK_DEPTH;
+  /* place for user code */
+}
+/* USER CODE END GET_IDLE_TASK_MEMORY */
+
+
 /* Init FreeRTOS */
 
 void MX_FREERTOS_Init(void) {
diff --git a/units/1wire/_ow_internal.h b/units/1wire/_ow_internal.h
index 8a5983c..5038ba5 100644
--- a/units/1wire/_ow_internal.h
+++ b/units/1wire/_ow_internal.h
@@ -19,6 +19,7 @@ struct priv {
 
     GPIO_TypeDef *port;
     uint32_t ll_pin;
+    TimerHandle_t busyWaitTimer; // timer used to wait for ds1820 measurement completion
 };
 
 // Prototypes
diff --git a/units/1wire/unit_1wire.c b/units/1wire/unit_1wire.c
index 602b583..3ed95f7 100644
--- a/units/1wire/unit_1wire.c
+++ b/units/1wire/unit_1wire.c
@@ -76,12 +76,21 @@ static void U1WIRE_writeIni(Unit *unit, IniWriter *iw)
 
 // ------------------------------------------------------------------------
 
+static void U1WIRE_TimerCb(TimerHandle_t xTimer)
+{
+
+}
+
 /** Allocate data structure and set defaults */
 static error_t U1WIRE_preInit(Unit *unit)
 {
     struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
     if (priv == NULL) return E_OUT_OF_MEM;
 
+    // the timer is not started until needed
+    priv->busyWaitTimer = xTimerCreate("1w_tim", 750, false, unit, U1WIRE_TimerCb);
+    if (priv->busyWaitTimer == NULL) return E_OUT_OF_MEM;
+
     // some defaults
     priv->pin_number = 0;
     priv->port_name = 'A';
@@ -122,6 +131,9 @@ static void U1WIRE_deInit(Unit *unit)
     // Release all resources
     rsc_teardown(unit);
 
+    // Delete the software timer
+    assert_param(pdPASS == xTimerDelete(priv->busyWaitTimer, 1000));
+
     // Free memory
     free_ck(unit->data);
 }