diff --git a/ampel-firmware/config.public.h b/ampel-firmware/config.public.h
index de542fabf065da36652ab033d09b96093c33f9a9..b90cae5828f01be2443e20e5aaecc0a3c52bb2f5 100644
--- a/ampel-firmware/config.public.h
+++ b/ampel-firmware/config.public.h
@@ -13,20 +13,16 @@
  *                              |___/
  ***/
 
-
 // This file is a config template, and can be copied to config.h.
 // Please don't save any important password in this template.
-
 // IMPORTANT: Parameters defined in config.h are only default values, and are applied if:
 //   * the ampel is flashed for the first time
 //   * or 'reset_config' command is called
 //   * or AMPEL_CONFIG_VERSION has been changed.
-
 // Once those default values have been applied, uploading the firmware with a modified config.h will not update the ampel configuration!
 // Every parameter can be modified and saved later via the web-config.
 // Some of those parameters can also be modified via commands in the Serial monitor :
 //    e.g. 'wifi 0' to turn WiFi off, or 'csv 60' to log data in csv every minute.
-
 /***
  * AMPEL
  */
@@ -167,6 +163,7 @@
 // 3) It has been tested with "TTGO ESP32 SX1276 LoRa 868" and will only work with an ESP32 + LoRa modem
 // 4) In order to use LoRaWAN, a gateway should be close to the co2ampel, and an account, an application and a device should be registered,
 //      e.g. on https://www.thethingsindustries.com/docs/integrations/
+//      with "Europe 863-870 MHz (SF9 for RX2 - recommended)", "MAC v1.0.3"
 // 5) The corresponding keys should be defined in LORAWAN_DEVICE_EUI, LORAWAN_APPLICATION_EUI and LORAWAN_APPLICATION_KEY
 // How often should measurements be sent over LoRaWAN?
 #  define LORAWAN_SENDING_INTERVAL 300 // [s] This value should not be too low. See https://www.thethingsnetwork.org/docs/lorawan/duty-cycle.html#maximum-duty-cycle