Updates the message about TLS for MQTT in setup

doc/source/source_rst/software/api.rst

@@ -12,5 +12,6 @@ API reference
 
 .. automodule:: ohmpi.ohmpi
    :members:
+
 .. automodule:: ohmpi.hardware_system
    :members:

setup_config.py

@@ -83,7 +83,8 @@ if os.path.exists('configs/' + config):
     # print('\n'+'_'*100)
     print('\n'+'*' * 93)
     print('*** You may customize the configuration of your OhmPi by editing the ohmpi/config.py file ***')
-    print('***     You should change the username and password used to connect to the mqtt broker    ***')
+    print('***   The MQTT communication can be encrypted with TLS/SSL but it is not set by default   ***')
+    print('***  You should then change the username and password used to connect to the mqtt broker  ***')
     print('***     Make sure you understand what you are doing to avoid damaging to your system      ***')
     print('*' * 93)