diff --git a/examples/platforms/nrf52840/Makefile.am b/examples/platforms/nrf52840/Makefile.am
index 95c2951ba..089010781 100644
--- a/examples/platforms/nrf52840/Makefile.am
+++ b/examples/platforms/nrf52840/Makefile.am
@@ -149,6 +149,8 @@ RADIO_DRIVER_SOURCES
     @top_builddir@/third_party/NordicSemiconductor/drivers/radio/nrf_802154_rx_buffer.c                      \
     @top_builddir@/third_party/NordicSemiconductor/drivers/radio/fem/nrf_fem_control.c                       \
     @top_builddir@/third_party/NordicSemiconductor/drivers/radio/mac_features/nrf_802154_filter.c            \
+    @top_builddir@/third_party/NordicSemiconductor/drivers/radio/mac_features/nrf_802154_ack_timeout.c       \
+    @top_builddir@/third_party/NordicSemiconductor/drivers/radio/mac_features/nrf_802154_csma_ca.c           \
     @top_builddir@/third_party/NordicSemiconductor/drivers/radio/platform/clock/nrf_802154_clock_sdk.c       \
     @top_builddir@/third_party/NordicSemiconductor/drivers/radio/timer_scheduler/nrf_802154_timer_sched.c    \
     $(NULL)
diff --git a/examples/platforms/nrf52840/platform-config.h b/examples/platforms/nrf52840/platform-config.h
index cb6bedf60..0942956e0 100644
--- a/examples/platforms/nrf52840/platform-config.h
+++ b/examples/platforms/nrf52840/platform-config.h
@@ -389,7 +389,7 @@
  *
  */
 #ifndef NRF_802154_CSMA_CA_ENABLED
-#define NRF_802154_CSMA_CA_ENABLED 0
+#define NRF_802154_CSMA_CA_ENABLED 1
 #endif
 
 /**
@@ -399,7 +399,7 @@
  *
  */
 #ifndef NRF_802154_ACK_TIMEOUT_ENABLED
-#define NRF_802154_ACK_TIMEOUT_ENABLED 0
+#define NRF_802154_ACK_TIMEOUT_ENABLED 1
 #endif
 
 #endif // PLATFORM_CONFIG_H_
diff --git a/examples/platforms/nrf52840/radio.c b/examples/platforms/nrf52840/radio.c
index a3d73838c..4685e0163 100644
--- a/examples/platforms/nrf52840/radio.c
+++ b/examples/platforms/nrf52840/radio.c
@@ -88,10 +88,9 @@ static int8_t   sEnergyDetected;
 
 typedef enum {
     kPendingEventSleep,                // Requested to enter Sleep state.
-    kPendingEventTransmit,             // Frame is queued for transmission.
     kPendingEventFrameTransmitted,     // Transmitted frame and received ACK (if requested).
     kPendingEventChannelAccessFailure, // Failed to transmit frame (channel busy).
-    kPendingEventInvalidAck,           // Failed to transmit frame (received invalid ACK).
+    kPendingEventInvalidOrNoAck,       // Failed to transmit frame (received invalid or no ACK).
     kPendingEventReceiveFailed,        // Failed to receive a valid frame.
     kPendingEventEnergyDetectionStart, // Requested to start Energy Detection procedure.
     kPendingEventEnergyDetected,       // Energy Detection finished.
@@ -160,7 +159,7 @@ static inline void clearPendingEvents(void)
 
     bitsToRemain &= ~(1UL << kPendingEventFrameTransmitted);
     bitsToRemain &= ~(1UL << kPendingEventChannelAccessFailure);
-    bitsToRemain &= ~(1UL << kPendingEventInvalidAck);
+    bitsToRemain &= ~(1UL << kPendingEventInvalidOrNoAck);
 
     bitsToRemain &= ~(1UL << kPendingEventSleep);
 
@@ -330,17 +329,9 @@ otError otPlatRadioTransmit(otInstance *aInstance, otRadioFrame *aFrame)
     aFrame->mPsdu[-1] = aFrame->mLength;
 
     nrf_802154_channel_set(aFrame->mChannel);
-
-    if (nrf_802154_transmit_raw(&aFrame->mPsdu[-1], true))
-    {
-        clearPendingEvents();
-        otPlatRadioTxStarted(aInstance, aFrame);
-    }
-    else
-    {
-        clearPendingEvents();
-        setPendingEvent(kPendingEventTransmit);
-    }
+    nrf_802154_transmit_csma_ca_raw(&aFrame->mPsdu[-1]);
+    clearPendingEvents();
+    otPlatRadioTxStarted(aInstance, aFrame);
 
     return OT_ERROR_NONE;
 }
@@ -363,7 +354,7 @@ otRadioCaps otPlatRadioGetCaps(otInstance *aInstance)
 {
     (void)aInstance;
 
-    return OT_RADIO_CAPS_ENERGY_SCAN;
+    return OT_RADIO_CAPS_ENERGY_SCAN | OT_RADIO_CAPS_ACK_TIMEOUT | OT_RADIO_CAPS_CSMA_BACKOFF;
 }
 
 bool otPlatRadioGetPromiscuous(otInstance *aInstance)
@@ -553,17 +544,6 @@ void nrf5RadioProcess(otInstance *aInstance)
         }
     }
 
-    if (isPendingEventSet(kPendingEventTransmit))
-    {
-        nrf_802154_channel_set(sTransmitFrame.mChannel);
-
-        if (nrf_802154_transmit_raw(sTransmitPsdu, true))
-        {
-            resetPendingEvent(kPendingEventTransmit);
-            otPlatRadioTxStarted(aInstance, &sTransmitFrame);
-        }
-    }
-
     if (isPendingEventSet(kPendingEventFrameTransmitted))
     {
 #if OPENTHREAD_ENABLE_DIAG
@@ -605,7 +585,7 @@ void nrf5RadioProcess(otInstance *aInstance)
         resetPendingEvent(kPendingEventChannelAccessFailure);
     }
 
-    if (isPendingEventSet(kPendingEventInvalidAck))
+    if (isPendingEventSet(kPendingEventInvalidOrNoAck))
     {
 #if OPENTHREAD_ENABLE_DIAG
 
@@ -619,7 +599,7 @@ void nrf5RadioProcess(otInstance *aInstance)
             otPlatRadioTxDone(aInstance, &sTransmitFrame, NULL, OT_ERROR_NO_ACK);
         }
 
-        resetPendingEvent(kPendingEventInvalidAck);
+        resetPendingEvent(kPendingEventInvalidOrNoAck);
     }
 
     if (isPendingEventSet(kPendingEventReceiveFailed))
@@ -756,8 +736,9 @@ void nrf_802154_transmit_failed(const uint8_t *aFrame, nrf_802154_tx_error_t err
         break;
 
     case NRF_802154_TX_ERROR_INVALID_ACK:
+    case NRF_802154_TX_ERROR_NO_ACK:
     case NRF_802154_TX_ERROR_NO_MEM:
-        setPendingEvent(kPendingEventInvalidAck);
+        setPendingEvent(kPendingEventInvalidOrNoAck);
         break;
     }
 }