Move led period define to config

config.h

@@ -1,3 +1,5 @@
+#define LED_TOGGLE_PERIOD     1000
+
 #define SERIAL_BAUD_RATE      115200
 
 // change pinouts if not defined through native board LORA_* definitions

esp32_loraprs.ino

@@ -2,8 +2,6 @@
 #include "WiFi.h"
 #include "loraprs_service.h"
 
-#define LED_TOGGLE_PERIOD   1000
-
 #if __has_include("/tmp/esp32_loraprs_config.h")
 #pragma message("Using external config")
 #include "/tmp/esp32_loraprs_config.h"