diff --git a/.obsidian/workspace b/.obsidian/workspace
index f2eadaa..910477f 100644
--- a/.obsidian/workspace
+++ b/.obsidian/workspace
@@ -81,7 +81,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "00. TOP/01. TODO.md",
+                "file": "02. PARA/01. Project（專案）/008. Sentinel.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -98,7 +98,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "00. TOP/01. TODO.md"
+                "file": "02. PARA/01. Project（專案）/008. Sentinel.md"
               }
             }
           }
@@ -126,11 +126,11 @@
     "direction": "horizontal",
     "width": 243
   },
-  "active": "036007e8b7c5715b",
+  "active": "ec13ce58b15fa6d4",
   "lastOpenFiles": [
+    "00. TOP/01. TODO.md",
     "02. PARA/01. Project（專案）/008. Sentinel.md",
     "01. Daily/2022-07-15(週五).md",
-    "00. TOP/01. TODO.md",
     "02. PARA/03. Resources（資源）/C++17/for_each.md",
     "02. PARA/03. Resources（資源）/讀書筆記/20220619 - 精確的力量.md",
     "02. PARA/03. Resources（資源）/C++17/智慧指標.md",
diff --git a/02. PARA/01. Project（專案）/008. Sentinel.md b/02. PARA/01. Project（專案）/008. Sentinel.md
index 2d2c1df..2d72bca 100644
--- a/02. PARA/01. Project（專案）/008. Sentinel.md	
+++ b/02. PARA/01. Project（專案）/008. Sentinel.md	
@@ -77,6 +77,13 @@ adb shell setprop debug.webcam.cam.id 1
 - Prevent to sleep: `adb shell "echo test > /sys/power/wake_lock"`
 - Allow to sleep: `adb shell "echo test > /sys/power/wake_unlock"`
 
+# Update firmware
+1. 要先備份calibration data，請看 [backup calibration](https://logitech.slack.com/archives/C0230SKKFF1/p1656475361667309)
+2. 用 `fastboot.bat` 來更新，請看 [**Flash using Fastboot**](https://docs.google.com/document/d/1XlJKXFqrPunre96C4sBUiWHmr5D0ogYje33_zfwJDCE/edit#heading=h.tdmkzb7xd29g)
+3. 如果第2步不成功的話，改用 [MTK flash tool 更新](https://docs.google.com/document/d/1XlJKXFqrPunre96C4sBUiWHmr5D0ogYje33_zfwJDCE/edit#heading=h.ovv79dcxs10b)
+4. 斷電重開機
+5. 恢復calibration data
+
 # MTK demo code
 - `vendor/mediatek/proprietary/packages/apps/DPTZDemo`
 
@@ -90,6 +97,7 @@ adb shell setprop debug.webcam.cam.id 1
 - [Sentinel EVT/DVT Sample Requirements](https://docs.google.com/spreadsheets/d/1uOLk1UU7T-ay-1TZfN1CLIhYqdwqbgGGZwfjRmMMcj0/edit#gid=0)
 - [Firmware comparison](https://spaces.logitech.com/pages/viewpage.action?pageId=135939412)
 - [[Sentinel] IQ control requirement](https://docs.google.com/spreadsheets/d/1vZhbGrb-Ei4kv3oXB983bNTgHInmg4tiQ8pHFhLrPPc/edit#gid=0)
+- [Dev Guide Sentinel PB1](https://docs.google.com/document/d/1XlJKXFqrPunre96C4sBUiWHmr5D0ogYje33_zfwJDCE/edit#heading=h.wtpjcs5n651h)
 
 # Jira
 - [[Sentinel][Tiny] HDR Requirements and System Design](https://jira.logitech.com/browse/VC-67445)
@@ -97,4 +105,5 @@ adb shell setprop debug.webcam.cam.id 1
 - [MTK ISP Pipeline: Data path implementation with single camera](https://jira.logitech.com/browse/VC-67422)
 - [MTK ISP Pipeline: Data path implementation with dual camera](https://jira.logitech.com/browse/VC-67420)
 - [[Sentinel][FIH] adb port connection hang](https://jira.logitech.com/browse/VC-64910)
-    - 解決device會hang的問題
\ No newline at end of file
+    - 解決device會hang的問題
+- [[Sentinel] Change the Camera Sensor Orientation to 0](https://jira.logitech.com/browse/VC-77929)
\ No newline at end of file