diff --git a/ChangeLog.txt b/ChangeLog.txt
index d6a60528606e8c7405f42b7d3156c5638a05530c..2334729a3fa1100fab30d09b5eeaabb04484e88c 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -6,16 +6,18 @@
 
 
 === Upcoming release / feature-calibration
-The main goal is to maje use of a BLE enabled ambiant sensor and to get at latest
-  two different measures points to compute the y= Ax + B parameters to achieve
-  correction of non calibrated sensors.
-Bumps to esp32 2.0.14
+The main goal is to make use of a BLE enabled ambiant sensor to provide our
+  our neOSensors two different measures points to compute the y= Ax + B
+  parameters to achieve correction of uncalibrated sensors.
+Kept esp32 2.0.14
 Kept esp8266 3.1.2
 - added status mode with additional functionnalities set @boot time:
-	press CLR 5s --> format SPIFFS (standard behaviour)
-	press CLR,SW+ for 5s --> format SPIFFS and CLEAR NVS namespaces
-	press SW+,SW- for 5s --> enter calibration mode
-- to be continued
+	press CLR 5s 			--> format SPIFFS (standard behaviour)
+	press CLR & SW+ for 5s 	--> format SPIFFS and CLEAR NVS namespaces (NVS_wifi, NVS_calibration ... all)
+	press SW+ & SW- for 5s 	--> enter calibration mode
+	press SW- for 5s 		--> sensors test mode (no WiFi nor BLE nor ...)
+Note: ensure when test sensor mode is activated to have the whole neOSensor configuration !
+
 
 === Release 231216 for esp32 only (Arduino Core ESP32 2.0.14) /
 feature-calibration