basic loraWAN sending, some settings done-- no keys or any of that though

Revision:
12:5015dfead3f2
Parent:
2:dc95ac6d6d4e
Child:
26:f07f5febf97f
--- a/README.md	Wed Apr 11 06:30:22 2018 +0100
+++ b/README.md	Wed Apr 18 06:30:24 2018 +0100
@@ -152,7 +152,9 @@
             }
      }
 ```
-The trace is disabled by default to save RAM.
+The trace is disabled by default to save RAM and reduce main stack usage (see chapter Memory optimization).
+
+**Please note that some targets with small RAM size (e.g. DISCO_L072CZ_LRWAN1 and MTB_MURATA_ABZ) mbed traces cannot be enabled without increasing the default** `"main_stack_size": 1024`**.**
 
 ## [Optional] Memory optimization