diff --git a/Firmware/src/secconfig.h b/Firmware/src/secconfig.h
index dd6f6d5..01f7e1c 100644
--- a/Firmware/src/secconfig.h
+++ b/Firmware/src/secconfig.h
@@ -12,6 +12,12 @@
    * LED Support
      #define LED_PIN PIN_A7 - LED is connected to ATTiny84 Pin A7 on TinyTX SMD / TinyLora
      
+   * Time between Measurements
+     #define SLEEP_TIME 528 - Time in Seconds between Measurements. Try it out to get a good Approximation
+     Examples from my Tests::
+       - 528 for 10 Minute Interval with a LoRa RFM95 + BME280
+       - 544 for 10 Minute Interval with a LoRa RFM95 + SHT21
+     
    * See the following Examples for needed RF Module Parameters, uncomment and adapt the one fitting your Hardware
 */
 
@@ -20,6 +26,7 @@
   #define RF_LORA
   #define HAS_SHT21
   #define LED_PIN PIN_A7
+  #define SLEEP_TIME 544
   // Information from The Things Network, device configuration ACTIVATION METHOD: ABP, msb left
   unsigned char NwkSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
   unsigned char AppSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };