diff --git a/.changesets/adjv3-protections-tcp.md b/.changesets/adjv3-protections-tcp.md
new file mode 100644
index 000000000..afd5a0688
--- /dev/null
+++ b/.changesets/adjv3-protections-tcp.md
@@ -0,0 +1,2 @@
+release: minor
+summary: Add ProtectionADJV3Packet TCP client with IP passed as an argument, plus improved error handling
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b20398d1..1766293ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -384,7 +384,9 @@ set(STLIB_LOW_CPP_NO_ETH
 
 set(STLIB_HIGH_C_ETH)
 
-set(STLIB_HIGH_CPP_ETH)
+set(STLIB_HIGH_CPP_ETH
+  ${CMAKE_CURRENT_LIST_DIR}/Src/ST-LIB_HIGH/Protections/ProtectionMessages.cpp
+)
 
 set(STLIB_HIGH_C_NO_ETH)
 
diff --git a/Inc/ST-LIB_HIGH/Protections/ProtectionMessages.hpp b/Inc/ST-LIB_HIGH/Protections/ProtectionMessages.hpp
new file mode 100644
index 000000000..ac8341431
--- /dev/null
+++ b/Inc/ST-LIB_HIGH/Protections/ProtectionMessages.hpp
@@ -0,0 +1,48 @@
+#pragma once
+/*
+ * ProtectionMessages.hpp
+ *      "Hello there"
+ *  Created on: Oct 22, 2026
+ *      Author: Aleks
+ */
+#include "ST-LIB_HIGH/Protections/SampleSource.hpp"
+#include "HALAL/Services/Diagnostics/Diagnostics.hpp"
+#include "ST-LIB_HIGH/Protections/FaultController.hpp"
+#include "ST-LIB_HIGH/Protections/Protection.hpp"
+#include "ST-LIB_HIGH/Protections/ProtectionTypes.hpp"
+#include <cstdint>
+#include <cstddef>
+#include <cstring>
+
+struct tcp_pcb;
+
+namespace ST_LIB {
+struct ProtectionADJv3Packet {
+
+    struct Data {
+        uint16_t id;
+        uint8_t hours;
+        uint8_t minutes;
+        uint8_t seconds;
+        uint8_t subseconds;
+        uint16_t reserved; // Just to not forget about it exists
+    };
+
+    struct Package {
+        size_t packageSize;
+        Data data;
+        // Maximum is 8 bytes, not all will be sent always
+        uint8_t value[8];
+    };
+
+public:
+    static Package
+    make(uint16_t measurement_id, Protections::RuleKind protection, size_t value_size);
+    static bool tcp_client_init(const char* ip, uint16_t port);
+    static bool tcp_client_send(Package& pack, const void* value);
+
+    static struct tcp_pcb* tpcb;
+    static bool is_connected;
+};
+
+} // namespace ST_LIB
diff --git a/Src/ST-LIB_HIGH/Protections/ProtectionMessages.cpp b/Src/ST-LIB_HIGH/Protections/ProtectionMessages.cpp
new file mode 100644
index 000000000..f07f79dec
--- /dev/null
+++ b/Src/ST-LIB_HIGH/Protections/ProtectionMessages.cpp
@@ -0,0 +1,88 @@
+/*
+ * ProtectionMessages.cpp
+ * "Hello there"
+ *  Created on: Oct 22, 2026
+ *      Author: Aleks
+ */
+#include "ST-LIB_HIGH/Protections/ProtectionMessages.hpp"
+#include "HALAL/Services/Time/RTC.hpp"
+#include "lwip/tcp.h"
+
+namespace ST_LIB {
+
+struct tcp_pcb* ProtectionADJv3Packet::tpcb = nullptr;
+bool ProtectionADJv3Packet::is_connected = false;
+
+ProtectionADJv3Packet::Package
+ProtectionADJv3Packet::make(uint16_t measurement_id, Protections::RuleKind prot, size_t valueSize) {
+    Package pack = {.packageSize = sizeof(Data) + valueSize, .data = {}};
+    // Bit packing of protection into 3 most significant bits of id (Look adjv3 format)
+    pack.data.id = (measurement_id & 0x1FFF) | (static_cast<uint16_t>(prot) << 13);
+    pack.data.hours = 0;
+    pack.data.minutes = 0;
+    pack.data.seconds = 0;
+    pack.data.subseconds = 0;
+    pack.data.reserved = 0;
+    return pack;
+}
+
+static err_t tcp_client_connected_callback(void* arg, struct tcp_pcb* pcb, err_t err) {
+    LWIP_UNUSED_ARG(arg);
+    LWIP_UNUSED_ARG(pcb);
+    if (err == ERR_OK) {
+        ProtectionADJv3Packet::is_connected = true;
+    }
+    return ERR_OK;
+}
+static void tcp_client_err_callback(void* arg, err_t err) {
+    LWIP_UNUSED_ARG(arg);
+    LWIP_UNUSED_ARG(err);
+    ProtectionADJv3Packet::tpcb = nullptr; // lwip already has freed the tpcb, only pointer is left
+    ProtectionADJv3Packet::is_connected = false;
+}
+
+bool ProtectionADJv3Packet::tcp_client_init(const char* ip, uint16_t port) {
+    if (tpcb != nullptr) { // it means we already have one tpcb initialized
+        return false;
+    }
+    ip_addr_t destIPADDR;
+    if (!ip4addr_aton(ip, &destIPADDR)) {
+        return false; // ip was not converted
+    }
+    tpcb = tcp_new();
+    if (tpcb == nullptr) {
+        return false; // tpcb was not initialized
+    }
+    tcp_err(tpcb, tcp_client_err_callback);
+    err_t err = tcp_connect(tpcb, &destIPADDR, port, tcp_client_connected_callback);
+    if (err != ERR_OK) { // we got an error while connecting
+        tcp_abort(tpcb);
+        tpcb = nullptr;
+        return false;
+    }
+    return true;
+}
+bool ProtectionADJv3Packet::tcp_client_send(
+    ProtectionADJv3Packet::Package& pack,
+    const void* value
+) {
+    if (tpcb == nullptr || !is_connected) {
+        return false;
+    }
+
+    memcpy(pack.value, value, pack.packageSize - sizeof(Data));
+#if defined(HAL_RTC_MODULE_ENABLED) && !defined(SIM_ON)
+    RTCData rtc = Global_RTC::get_rtc_timestamp();
+    pack.data.hours = rtc.hour;
+    pack.data.minutes = rtc.minute;
+    pack.data.seconds = rtc.second;
+    pack.data.subseconds = static_cast<uint8_t>((rtc.counter * 256) / (RTC_MAX_COUNTER + 1));
+#endif // if HAL_RTC was not enabled  all values were initialized before to 0
+    err_t err = tcp_write(tpcb, &pack.data, pack.packageSize, TCP_WRITE_FLAG_COPY);
+    if (err != ERR_OK) {
+        return false;
+    }
+    return tcp_output(tpcb) == ERR_OK;
+}
+
+} // namespace ST_LIB