add site.conf validy check

README.md

@@ -40,6 +40,7 @@ Adapt and add this block to your site.conf:
 
 ```
 ssid_changer = {
+  enabled = true,
   switch_timeframe = 30,    -- only once every timeframe (in minutes) the SSID will change to the Offline-SSID 
                             -- set to 1440 to change once a day
                             -- set to 1 minute to change every time the router gets offline
@@ -47,11 +48,11 @@ ssid_changer = {
   prefix = 'FF_Offline_',   -- use something short to leave space for the nodename (no '~' allowed!)
   suffix = 'nodename',      -- generate the SSID with either 'nodename', 'mac' or to use only the prefix: 'none'
   
-  tq_limit_enabled = 0,   -- if false, the offline SSID will only be set if there is no gateway reacheable
+  tq_limit_enabled = false, -- if false, the offline SSID will only be set if there is no gateway reacheable
                             -- upper and lower limit to turn the offline_ssid on and off
                             -- in-between these two values the SSID will never be changed to prevent it from toggeling every minute.
-  tq_limit_max = '45',    -- upper limit, above that the online SSID will be used
-  tq_limit_min = '35'     -- lower limit, below that the offline SSID will be used
+  tq_limit_max = 45,        -- upper limit, above that the online SSID will be used
+  tq_limit_min = 35         -- lower limit, below that the offline SSID will be used
 },
 ```
 

gluon-ssid-changer/check_site.lua

+if need_table('ssid_changer', nil, false) then
+  need_boolean('ssid_changer.enabled', false)
+  need_number('ssid_changer.switch_timeframe', false)
+  need_number('ssid_changer.first', false)
+  need_string('ssid_changer.prefix', false)
+  need_string('ssid_changer.suffix', false)
+  if need_boolean('ssid_changer.tq_limit_enabled', false) then
+    need_number('ssid_changer.tq_limit_max', false)
+    need_number('ssid_changer.tq_limit_min', false)
+  end
+end