diff --git a/readme.txt b/readme.txt
index e350445..81f102f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -43,4 +43,5 @@ Pre-defines
 	Jumbo Roll, Tissue Paper, Waste Bin sensor
 
    2024-05-24   GOOD R1D with higher power consumption at 30uA
+   2024-05-28   GOOD R1D with lower power and TPS shutdown to 0V, yet, TOF range data incorrect. or not ranging at all
   ******************************************************************************