diff --git a/components/free_rtos/ethernet_ip/eth_udp_client.cpp b/components/free_rtos/ethernet_ip/eth_udp_client.cpp
index 52b1a30..744693f 100644
--- a/components/free_rtos/ethernet_ip/eth_udp_client.cpp
+++ b/components/free_rtos/ethernet_ip/eth_udp_client.cpp
@@ -36,10 +36,13 @@ void free_rtos::EthUpdClient::put_data(uint32_t src_ip, uint8_t * p_data, uint32
     {
         LockGuard lock(rx_mut_); ///  ��������� �������
 
-        /// ������������ ������������ ������ ������ � ������
-        if (buff_.size() < max_buf_size) {
-            buff_.insert(buff_.end(), p_data, p_data + len);
+        if(buff_.size() + len > max_buf_size) {
+            DebugP_log((char *)"Warning ! UDP client buffer overflow !\r\n");
+
+            return;
         }
+
+        buff_.insert(buff_.end(), p_data, p_data + len);
     }
 
     src_ip_ = src_ip;
@@ -76,7 +79,7 @@ int32_t free_rtos::EthUpdClient::read(uint8_t * p_data, uint32_t len)
     }
 
     /// ���� ����� ����, ������� ������ ������
-    while (buff_.empty()) { // Не заменять на if ! Иначе следующий прием получит пустой буфер т.к. семафор может быть не сброшен !
+    while (buff_.empty()) {
         rx_sem_.pend();
     }
 
diff --git a/components/free_rtos/ethernet_ip/eth_udp_client.hpp b/components/free_rtos/ethernet_ip/eth_udp_client.hpp
index 2223ff1..9816a39 100644
--- a/components/free_rtos/ethernet_ip/eth_udp_client.hpp
+++ b/components/free_rtos/ethernet_ip/eth_udp_client.hpp
@@ -33,7 +33,7 @@ public:
     int32_t read_async(uint8_t * p_data, uint32_t len);
 
     template<class T, class Allocator>
-    int32_t read_async(std::vector<T, Allocator>& data, uint32_t len = 65535)
+    int32_t read_async(std::vector<T, Allocator>& data, uint32_t len)
     {
         if (len == 0) {
             return 0;
@@ -83,7 +83,7 @@ private:
     }
 
 private:
-    const uint32_t max_buf_size = 0x100000; // 1Mb
+    const uint32_t max_buf_size = 0x10000; // 0x10000 - 65536, 0x11CA - 4554, 0x0BDC - 3036, 0x100000 - 1Mb
 
     Semaphore rx_sem_;
     Mutex     rx_mut_;
diff --git a/components/free_rtos/ethernet_ip/eth_udp_server.hpp b/components/free_rtos/ethernet_ip/eth_udp_server.hpp
index b4ce098..18f42b8 100644
--- a/components/free_rtos/ethernet_ip/eth_udp_server.hpp
+++ b/components/free_rtos/ethernet_ip/eth_udp_server.hpp
@@ -32,7 +32,13 @@ public:
 
     virtual int32_t select(uint32_t ticks = SystemP_WAIT_FOREVER) override
     {
-        return rx_sem_.pend(ticks);
+        int32_t sts;
+
+        do {
+            sts = rx_sem_.pend(ticks);
+        } while(sts != SystemP_SUCCESS);
+
+        return sts;
     }
 
 private: