diff --git a/include/Utils/StringUtils.h b/include/Utils/StringUtils.h
index 2bf412cc..e98a8f76 100644
--- a/include/Utils/StringUtils.h
+++ b/include/Utils/StringUtils.h
@@ -26,7 +26,9 @@ size_t itemsCount2(String str, const String& separator);
 
 size_t itemsCount(String& str, const char* delim);
 
-boolean isDigitStr(const String&);
+boolean isDigitStr(const String& str);
+
+boolean isDigitDotCommaStr(const String& str);
 
 String prettyBytes(size_t size);
 
diff --git a/src/Tests.cpp b/src/Tests.cpp
index 0ce15233..b274c711 100644
--- a/src/Tests.cpp
+++ b/src/Tests.cpp
@@ -8,6 +8,8 @@
 void testsPerform() {
     Serial.println("====some tests section====");
 
+    //Serial.println(isDigitDotCommaStr("-12552.5555"));
+
     //String str = "Geeks for Geeks ";
     //
     //Serial.println(itemsCount2(str, " "));
diff --git a/src/Utils/StringUtils.cpp b/src/Utils/StringUtils.cpp
index 08ec5fa9..11e110bd 100644
--- a/src/Utils/StringUtils.cpp
+++ b/src/Utils/StringUtils.cpp
@@ -114,6 +114,16 @@ boolean isDigitStr(const String& str) {
     return str.length();
 }
 
+boolean isDigitDotCommaStr(const String& str) {
+    for (size_t i = 0; i < str.length(); i++) {
+        char latter = str.charAt(i);
+        if (!isDigit(latter) && latter != '.' && latter != '-') {
+            return false;
+        }
+    }
+    return true;
+}
+
 String prettyBytes(size_t size) {
     if (size < 1024)
         return String(size) + "b";