diff --git a/hardware/Arduino/35-arduino.html b/hardware/Arduino/35-arduino.html
index ee7a420f..40585b18 100644
--- a/hardware/Arduino/35-arduino.html
+++ b/hardware/Arduino/35-arduino.html
@@ -27,6 +27,7 @@
         <select type="text" id="node-input-state" style="width: 150px;">
             <option value="INPUT" data-i18n="arduino.state.in.digital"></option>
             <option value="ANALOG" data-i18n="arduino.state.in.analogue"></option>
+			      <option value="STRING" data-i18n="arduino.state.in.string"></option>
         </select>
     </div>
     <div class="form-row">
@@ -83,6 +84,7 @@
             <option value="OUTPUT" data-i18n="arduino.state.out.digital"></option>
             <option value="PWM" data-i18n="arduino.state.out.analogue"></option>
             <option value="SERVO" data-i18n="arduino.state.out.servo"></option>
+			      <option value="STRING" data-i18n="arduino.state.out.string"></option>
         </select>
     </div>
     <div class="form-row">