diff --git a/enedisgateway2mqtt/README.md b/enedisgateway2mqtt/README.md
index fda011032..59f4be640 100644
--- a/enedisgateway2mqtt/README.md
+++ b/enedisgateway2mqtt/README.md
@@ -18,8 +18,14 @@ See its github for all informations : https://github.com/m4dm4rtig4n/enedisgatew
 
 ## Configuration
 
-Configure the addon through its options page.
-See this page for configuration : https://hub.docker.com/r/m4dm4rtig4n/enedisgateway2mqtt
+The complete list of options can be seen here : https://github.com/m4dm4rtig4n/enedisgateway2mqtt#environment-variable
+
+There are 3 ways to configure this addon :
+- Using the addon options
+- Using the custom_var field, where variables not already defined in the addon options can be described using the format : var1="text1",var2="text2"
+- Manually editing the file /config/enedisgateway2mqtt/enedisgateway2mqtt.conf and adding options with the format var1="text1"
+
+All variables defined the in the addon options and custom_var fields are automatically copied in the /config/enedisgateway2mqtt/enedisgateway2mqtt.conf file.
 
 ## Installation