diff --git a/nut-reverseengineering.md b/nut-reverseengineering.md
new file mode 100644
index 0000000..85d5aa1
--- /dev/null
+++ b/nut-reverseengineering.md
@@ -0,0 +1,34 @@
+command used:
+```console
+# /lib/nut/usbhid-ups -a upsname -DDD
+```
+
+
+
+### report id 0x06
+`06` **64** e4 08
+RemainingCapacity, Offset: 0, Size: 8, Value: **100**
+_0x64 => 100_
+
+`06` 64 **e4 08**
+RunTimeToEmpty, Offset: 8, Size: 16, Value: **2276**
+_0x08e4 => 2276_
+
+
+
+### report id 0x01
+`01` **01** 00 01 00 01 00 00
+ACPresent, Offset: 0, Size: 8, Value: **1**
+_0x01 => 1 => true_
+
+`01` 01 **00** 01 00 01 00 00
+BelowRemainingCapacityLimit, Offset: 8, Size: 8, Value: **0**
+_0x00 => 0 => false_
+
+`01` 01 00 **01** 00 01 00 00
+Charging, Offset: 16, Size: 8, Value: **1**
+_0x01 => 1 => true_
+
+`01` 01 00 01 **00** 01 00 00
+Discharging, Offset: 24, Size: 8, Value: **0**
+_0x00 => 0 => false_