diff --git a/examples/randomNumbers-IoT/randomNumbers-IoT.ino b/examples/randomNumbers-IoT/randomNumbers-IoT.ino
deleted file mode 100644
index 3f5f20c..0000000
--- a/examples/randomNumbers-IoT/randomNumbers-IoT.ino
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <phyphoxBle.h> 
-
-void setup() {
-    PhyphoxBLE::start();                 //Start the BLE server
-}
-
-void loop() {
-    float randomNumber = random(0,100); //Generate random number in the range 0 to 100
-    PhyphoxBLE::write(randomNumber);     //Send value to phyphox
-    delay(50);                          //Shortly pause before repeating
-
-    PhyphoxBLE::poll();                  //IMPORTANT: In contrast to other devices, poll() needs to be called periodically on the 33 IoT
-}
diff --git a/examples/randomNumbers-IoT/randomNumbersIoT.ino b/examples/randomNumbers-IoT/randomNumbersIoT.ino
deleted file mode 100644
index 3f5f20c..0000000
--- a/examples/randomNumbers-IoT/randomNumbersIoT.ino
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <phyphoxBle.h> 
-
-void setup() {
-    PhyphoxBLE::start();                 //Start the BLE server
-}
-
-void loop() {
-    float randomNumber = random(0,100); //Generate random number in the range 0 to 100
-    PhyphoxBLE::write(randomNumber);     //Send value to phyphox
-    delay(50);                          //Shortly pause before repeating
-
-    PhyphoxBLE::poll();                  //IMPORTANT: In contrast to other devices, poll() needs to be called periodically on the 33 IoT
-}
diff --git a/library.properties b/library.properties
index 61e6eeb..44758f1 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=phyphox BLE
-version=1.2.0
+version=1.2.1
 author=RWTH Aachen University <contact@phyphox.org>
 maintainer=Dominik Dorsel <dominik@phyphox.org>
 sentence=Use the app phyphox to visualize your sensor data on your phone or tablet!
diff --git a/src/phyphoxBleExperiment.h b/src/phyphoxBleExperiment.h
index 9c2f055..ba37e2d 100644
--- a/src/phyphoxBleExperiment.h
+++ b/src/phyphoxBleExperiment.h
@@ -4,6 +4,7 @@
 #include <Arduino.h>
 #include "copyToMem.h"
 #include "defines.h"
+#include <string>
 
 class PhyphoxBleExperiment {