diff --git a/Firmware/src/secconfig.h b/Firmware/src/secconfig.h
index df25907..dd6f6d5 100644
--- a/Firmware/src/secconfig.h
+++ b/Firmware/src/secconfig.h
@@ -1,4 +1,37 @@
-// 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 };
-unsigned char DevAddr[4] = { 0x00, 0x00, 0x00, 0x00 };
+/* 
+   secconfig.h - Firmware Configuration
+   
+   * Supported RF Modules
+     #define RF_LORA  - HopeRF RFM95 LoRa Module
+     #define RF_RFM69 - HopeRF RFM69(H)(C)W Module
+   
+   * Supported Sensors
+     #define HAS_SHT21  - Sensirion SHT21 Temperature + Humidity Sensor
+     #define HAS_BME280 - Bosch BME280 Temperature + Humidity + Pressure Sensor
+   
+   * LED Support
+     #define LED_PIN PIN_A7 - LED is connected to ATTiny84 Pin A7 on TinyTX SMD / TinyLora
+     
+   * See the following Examples for needed RF Module Parameters, uncomment and adapt the one fitting your Hardware
+*/
+
+
+// LoRa RFM95 + SHT21, LED on Pin A7
+  #define RF_LORA
+  #define HAS_SHT21
+  #define LED_PIN PIN_A7
+  // 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 };
+  unsigned char DevAddr[4] = { 0x00, 0x00, 0x00, 0x00 };
+
+/* RFM69 + BME280, LED on Pin A7
+  #define RF_RFM69
+  #define HAS_BME280
+  #define LED_PIN PIN_A7
+  #define RFM69_NETWORKID 101 // NetworkID, 0-255, sould be the same for Node and Receiver
+  #define RFM69_NODEID     29 // NodeID of this Sensor, 1-255, should be unique for every node in the same Network
+  #define RFM69_GATEWAY     1 // NodeID of the Receiver, 1-255
+  #define RFM69_TXPOWER    31 // Transmitting Power 0-31, see datasheet for details
+  #define RFM69_ENCKEY    "0123456789ABCDEF" // AES encryption key, exactly 16 characters, if set messages will be encrypted using AES 128bit
+*/
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