diff --git a/platformio.ini b/platformio.ini
index 18042fe..1bd4c0f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -20,6 +20,11 @@ extra_configs =
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;Uncomment the env line corresponding to your board and modules required,              ;
 ;you can also adapt the modules by removing the corresponding lines in the env detail  ;
+; if you go to the build flag section of your env you will see that some user_config.h ;
+; parameters can be overwritten here, for example the gateway name.                    ;
+; If you want to avoid the lost of your environments at each update you can put them   ;
+; into a separate file called prod_env.ini, it will be automatically read by pio       ;
+; an example (prod_env.ini.example) is available into the same folder as this file.    ;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 ;default_envs = sonoff-basic-rfr3
diff --git a/prod_env.ini.example b/prod_env.ini.example
new file mode 100644
index 0000000..e11ef58
--- /dev/null
+++ b/prod_env.ini.example
@@ -0,0 +1,43 @@
+[platformio]
+default_envs = 
+  esp32dev-ble-1
+  esp32dev-ble-2
+
+;esp32 1
+[env:esp32dev-ble-1]
+platform = ${com.esp32_platform}
+board = esp32dev
+board_build.partitions = min_spiffs.csv
+lib_deps =
+  ${com-esp.lib_deps}
+  ${libraries.ble}
+build_flags = 
+  ${com-esp.build_flags}
+  '-DZgatewayBT="BT"'
+  '-DGateway_Name="OpenMQTTGateway_ESP32_1"'
+upload_protocol = espota
+upload_port = 192.168.1.82
+upload_flags =
+  --auth=OTAPASSWORD
+upload_speed = 512000
+monitor_speed = 115200
+
+;esp32 2
+[env:esp32dev-ble-2]
+platform = ${com.esp32_platform}
+board = esp32dev
+board_build.partitions = min_spiffs.csv
+lib_deps =
+  ${com-esp.lib_deps}
+  ${libraries.ble}
+build_flags = 
+  ${com-esp.build_flags}
+  '-DZgatewayBT="BT"'
+  '-DGateway_Name="OpenMQTTGateway_ESP32_2"'
+  ;-DCORE_DEBUG_LEVEL=4
+upload_protocol = espota
+upload_port = 192.168.1.111
+upload_flags =
+  --auth=OTAPASSWORD
+upload_speed = 512000
+monitor_speed = 115200