diff --git a/.gitmodules b/.gitmodules
index f7e01f0..7dce60a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "modules/pico-onewire"]
 	path = modules/pico-onewire
 	url = https://github.com/adamboardman/pico-onewire.git
+[submodule "modules/fmt"]
+	path = modules/fmt
+	url = https://github.com/fmtlib/fmt.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 362656f..10d1e65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,4 +18,5 @@ project(gbmanager VERSION "1.0.0" LANGUAGES C CXX ASM)
 pico_sdk_init()
 
 add_subdirectory(modules/pico-onewire)
+add_subdirectory(modules/fmt)
 add_subdirectory(src)
\ No newline at end of file
diff --git a/modules/fmt b/modules/fmt
new file mode 160000
index 0000000..b6f4cea
--- /dev/null
+++ b/modules/fmt
@@ -0,0 +1 @@
+Subproject commit b6f4ceaed0a0a24ccf575fab6c56dd50ccf6f1a9
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bdddc2f..a5256dc 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -22,7 +22,7 @@ else()
 endif()
 
 # Add the standard library to the build
-target_link_libraries(${CMAKE_PROJECT_NAME} pico_stdlib pico_one_wire)
+target_link_libraries(${CMAKE_PROJECT_NAME} pico_stdlib pico_one_wire fmt::fmt-header-only)
 
 # Add any user requested libraries
 target_link_libraries(${CMAKE_PROJECT_NAME}
diff --git a/src/gbmanager.cpp b/src/gbmanager.cpp
index a932d61..f6c8445 100644
--- a/src/gbmanager.cpp
+++ b/src/gbmanager.cpp
@@ -1,5 +1,6 @@
-#include <sstream>
+#include <string>
 
+#include "../modules/fmt/include/fmt/format.h"
 #include "../modules/pico-onewire/api/one_wire.h"
 #include "hardware/i2c.h"
 #include "pico/stdlib.h"
@@ -28,7 +29,7 @@ absolute_time_t lastPressed = get_absolute_time();
 
 using std::string;
 
-void buttonPressedCallback(uint gpio, uint32_t events) {
+void buttonPressedCallback(uint gpio, [[maybe_unused]] uint32_t events) {
     absolute_time_t now = get_absolute_time();
     if (absolute_time_diff_us(lastPressed, now) < 750000) {
         return;
@@ -76,14 +77,14 @@ int main() {
 
     float temp_act{0};
     float temp_diff{0.5};
-    std::stringstream lcdText{};
+    string lcdText{};
     bool isHeating = false;
     string heatInfo{""};
     string systemInfo{""};
 
-    lcdText << " G" << CUSTOM_CHAR_AE << "rbox Manager\n (Ver. "
-            << PROJECT_VERSION << ")";
-    myLCD.sendString(lcdText.str());
+    lcdText = fmt::format(" G{}rbox Manager\n (Ver. {})", CUSTOM_CHAR_AE,
+                          PROJECT_VERSION);
+    myLCD.sendString(lcdText);
     sleep_ms(3000);
 
     while (true) {
@@ -103,14 +104,10 @@ int main() {
 
         relais.activate(isHeating);
 
-        lcdText.str("");
-        lcdText.clear();
-        lcdText.precision(4);
-        lcdText << "ACT: " << temp_act << CUSTOM_CHAR_DEG << "C " << heatInfo
-                << "\n"
-                << "TGT: " << temp_tgt << CUSTOM_CHAR_DEG << "C " << systemInfo;
-
+        lcdText = fmt::format("ACT: {:05.2f} {}C {}\nACT: {:05.2f} {}C {}",
+                              temp_act, CUSTOM_CHAR_DEG, heatInfo, temp_tgt,
+                              CUSTOM_CHAR_DEG, systemInfo);
         myLCD.setCursor(0, 0);
-        myLCD.sendString(lcdText.str());
+        myLCD.sendString(lcdText);
     }
 }
\ No newline at end of file