diff --git a/src/eez/modules/dib-mio168/dib-mio168.cpp b/src/eez/modules/dib-mio168/dib-mio168.cpp
index f3d4a8515..eb505adce 100644
--- a/src/eez/modules/dib-mio168/dib-mio168.cpp
+++ b/src/eez/modules/dib-mio168/dib-mio168.cpp
@@ -976,6 +976,7 @@ struct Mio168Module : public Module {
     TestResult testResult = TEST_NONE;
     bool synchronized = false;
     int numCrcErrors = 0;
+    int numTransferErrors = 0;
     uint8_t input[sizeof(FromSlaveToMaster)];
     uint8_t output[sizeof(FromSlaveToMaster)];
     bool spiReady = false;
@@ -1039,6 +1040,7 @@ struct Mio168Module : public Module {
             if (bp3c::comm::masterSynchro(slotIndex)) {
                 synchronized = true;
                 numCrcErrors = 0;
+                numTransferErrors = 0;
                 testResult = TEST_OK;
 #ifdef EEZ_PLATFORM_SIMULATOR
                 sendMessageToLowPriorityThread(THREAD_MESSAGE_FS_DRIVER_LINK, slotIndex, 0);
@@ -1136,6 +1138,7 @@ struct Mio168Module : public Module {
             }
 
             numCrcErrors = 0;
+            numTransferErrors = 0;
 
             FromSlaveToMaster &data = (FromSlaveToMaster &)*input;
 
@@ -1167,15 +1170,23 @@ struct Mio168Module : public Module {
             return true;
         } else {
             if (status == bp3c::comm::TRANSFER_STATUS_CRC_ERROR) {
-                if (++numCrcErrors >= 10) {
+                numCrcErrors++;
+                if (numCrcErrors >= 10) {
                     event_queue::pushEvent(event_queue::EVENT_ERROR_SLOT1_CRC_CHECK_ERROR + slotIndex);
                     synchronized = false;
                     testResult = TEST_FAILED;
-                } else {
-                    DebugTrace("Slot %d CRC %d\n", slotIndex + 1, numCrcErrors);
+                } else if (numCrcErrors > 5) {
+                    DebugTrace("Slot %d CRC error no. %d\n", slotIndex + 1, numCrcErrors);
                 }
             } else {
-                DebugTrace("Slot %d SPI transfer error %d\n", slotIndex + 1, status);
+                numTransferErrors++;
+                if (numTransferErrors >= 10) {
+                    event_queue::pushEvent(event_queue::EVENT_ERROR_SLOT1_SYNC_ERROR + slotIndex);
+                    synchronized = false;
+                    testResult = TEST_FAILED;
+                } else if (numTransferErrors > 5) {
+                    DebugTrace("Slot %d SPI transfer error %d no. %d\n", slotIndex + 1, status, numTransferErrors);
+                }
             }
 
             return false;
diff --git a/src/eez/modules/mcu/ethernet.cpp b/src/eez/modules/mcu/ethernet.cpp
index 9fb61340a..c9253f9a6 100644
--- a/src/eez/modules/mcu/ethernet.cpp
+++ b/src/eez/modules/mcu/ethernet.cpp
@@ -822,7 +822,32 @@ void releaseInputBuffer() {
 
 int writeBuffer(const char *buffer, uint32_t length) {
 #if defined(EEZ_PLATFORM_STM32)
-	netconn_write(g_tcpClientConnection, (void *)buffer, (uint16_t)length, NETCONN_COPY);
+    if (length <= 1024) {
+        static const size_t NUM_BUFFERS = 4;
+        static uint8_t g_buffers[NUM_BUFFERS][1024];
+        static bool g_isBufferUsed[NUM_BUFFERS];
+
+        size_t i;
+        for (i = 0; i < NUM_BUFFERS; i++) {
+            if (!g_isBufferUsed[i]) {
+                memcpy(&g_buffers[i][0], buffer, length);
+                netconn_write(g_tcpClientConnection, (void *)&g_buffers[i][0], (uint16_t)length, NETCONN_NOCOPY);
+                g_isBufferUsed[i] = true;
+                break;
+            }
+        }
+
+        if (i == NUM_BUFFERS) {
+            netconn_write(g_tcpClientConnection, (void *)buffer, (uint16_t)length, NETCONN_COPY);
+            
+            for (size_t i = 0; i < NUM_BUFFERS; i++) {
+                g_isBufferUsed[i] = false;
+            }
+        }
+    } else {
+        netconn_write(g_tcpClientConnection, (void *)buffer, (uint16_t)length, NETCONN_COPY);
+    }
+
     return length;
 #endif
 
diff --git a/src/third_party/stm32_cubeide/.settings/stm32cubeide.project.prefs b/src/third_party/stm32_cubeide/.settings/stm32cubeide.project.prefs
index 64d8b897f..1ba9449b3 100644
--- a/src/third_party/stm32_cubeide/.settings/stm32cubeide.project.prefs
+++ b/src/third_party/stm32_cubeide/.settings/stm32cubeide.project.prefs
@@ -1,4 +1,4 @@
-2F62501ED4689FB349E356AB974DBE57=6324EFC706C094AE3B0AEB00227A953C
-8DF89ED150041C4CBC7CB9A9CAA90856=6324EFC706C094AE3B0AEB00227A953C
-DC22A860405A8BF2F2C095E5B6529F12=C8E89020F1502089B9D4C78CEB9BD12A
+2F62501ED4689FB349E356AB974DBE57=618266508428BDF06C84712473DD5FAA
+8DF89ED150041C4CBC7CB9A9CAA90856=618266508428BDF06C84712473DD5FAA
+DC22A860405A8BF2F2C095E5B6529F12=42CF0666AD1D078F9BC5A8F2E0EF7764
 eclipse.preferences.version=1