diff --git a/Drv/LinuxUartDriver/LinuxUartDriver.cpp b/Drv/LinuxUartDriver/LinuxUartDriver.cpp
index a0d08f9ec12..7decbd4ec88 100644
--- a/Drv/LinuxUartDriver/LinuxUartDriver.cpp
+++ b/Drv/LinuxUartDriver/LinuxUartDriver.cpp
@@ -31,6 +31,8 @@ LinuxUartDriver ::LinuxUartDriver(const char* const compName)
       m_fd(-1),
       m_allocationSize(0),
       m_device("NOT_EXIST"),
+      m_bytesSent(0),
+      m_bytesReceived(0),
       m_quitReadThread(false) {}
 
 bool LinuxUartDriver::open(const char* const device,
@@ -308,6 +310,9 @@ void LinuxUartDriver ::send_handler(const FwIndexType portNum, Fw::Buffer& serBu
             Fw::LogStringArg _arg = this->m_device;
             this->log_WARNING_HI_WriteError(_arg, static_cast<I32>(stat));
             status = Drv::ByteStreamStatus::OTHER_ERROR;
+        } else {
+            this->m_bytesSent += static_cast<FwSizeType>(stat);
+            this->tlmWrite_BytesSent(this->m_bytesSent);
         }
     }
     // Return the buffer back to the caller
@@ -356,9 +361,12 @@ void LinuxUartDriver ::serialReadTaskEntry(void* ptr) {
         } else if (stat > 0) {
             buff.setSize(static_cast<U32>(stat));
             status = ByteStreamStatus::OP_OK;  // added by m.chase 03.06.2017
+            comp->m_bytesReceived += static_cast<FwSizeType>(stat);
+            comp->tlmWrite_BytesRecv(comp->m_bytesReceived);
         } else {
             status = ByteStreamStatus::OTHER_ERROR;  // Simply to return the buffer
         }
+
         comp->recv_out(0, buff, status);  // added by m.chase 03.06.2017
     }
 }
diff --git a/Drv/LinuxUartDriver/LinuxUartDriver.hpp b/Drv/LinuxUartDriver/LinuxUartDriver.hpp
index 419bbe915f7..f9b2bd788a4 100644
--- a/Drv/LinuxUartDriver/LinuxUartDriver.hpp
+++ b/Drv/LinuxUartDriver/LinuxUartDriver.hpp
@@ -116,7 +116,9 @@ class LinuxUartDriver final : public LinuxUartDriverComponentBase {
 
     Os::Task m_readTask;  //!< task instance for thread to read serial port
 
-    bool m_quitReadThread;  //!< flag to quit thread
+    FwSizeType m_bytesSent;      //!< number of bytes sent
+    FwSizeType m_bytesReceived;  //!< number of bytes received
+    bool m_quitReadThread;       //!< flag to quit thread
 };
 
 }  // end namespace Drv
diff --git a/Drv/LinuxUartDriver/Telemetry.fppi b/Drv/LinuxUartDriver/Telemetry.fppi
index ec8fd1ce516..5bf7af63adc 100644
--- a/Drv/LinuxUartDriver/Telemetry.fppi
+++ b/Drv/LinuxUartDriver/Telemetry.fppi
@@ -1,5 +1,5 @@
 @ Bytes Sent
-telemetry BytesSent: U32 id 0
+telemetry BytesSent: FwSizeType id 0
 
 @ Bytes Received
-telemetry BytesRecv: U32 id 1
+telemetry BytesRecv: FwSizeType id 1