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--- doc:appunti:hardware:xiaomi_yi [2021/04/08 08:45] – niccolo
+++ doc:appunti:hardware:xiaomi_yi [2022/05/12 17:58] (current) – [Problema WiFi non funzionante] niccolo
@@ Line 1: / Line 1: @@
 ====== Action Camera Xiaomi Yi ======
+The **Xiaomi Yi** action camera was introduced in **2015**, despite being a low-cost cam, it feature a very good chip and sensor, producing images comparable with the most famous cameras. It lacks the screen, so evey settings must be adjusted using the companion smartphone app.
 {{.:yi:xiaomi-yi-hd-camera.jpg?direct&200|Xiaomi Yi}}
-===== Video Format =====
+===== Technical Specs =====
+^ Specs  ^^
+^ Size             | 60.4 x 42 x 21.2 mm                  |
+^ Weight           | 76.6 g                               |
+^ Image Processor  | Ambarella A7LS                       |
+^ Image Sensor     | 16MP Sony EXMOR R CMOS BSI           |
+^ Lens             | 155ᵒ ultra wide angle glass lens     |
+^ Aperture         | F2.8                                 |
+^ Battery          | 1000 mA, up to 90 minutes recording  |
+^ Storage          | Micro SD card up to 64Gb, class 10   |
+^ Video Format  ^^
 ^ Format    | AVC       |
 ^ Profile   | Main@L4   |
@@ Line 11: / Line 23: @@
 ^ Size      | 1920 x 1080 pixels    |
 ^ Bit rate  | 12.0 Mb/s (Variable)  |
+^ Video Size  ^^
-^  Video Size  ^^
+^ 1 sec   |     1.45 Mb |
-^ 1 secondo  |     1.45 Mb |
+^ 1 min   |    87.83 Mb |
-^ 1 minuto   |    87.83 Mb |
+^ 1 hour  |     5.09 Gb |
-^ 1 ora      |     5.09 Gb |
 ===== Problema di formattazione microSD =====
@@ Line 38: / Line 49: @@
 fsck.vfat -v -n /dev/sdc1
 </code>
+===== Password WiFi =====
+La password predefinita per l'access point offerto dalla telecamera è **1234567890**.
 ===== Problema WiFi non funzionante =====
@@ Line 89: / Line 104: @@
 This means that a new battery **does not fit** into an older camera, instead an old battery **requires a thickness of 1 mm** to stay into the new camera. The only change in sizes are about **battery** and **battery cover**, it seems that sizes of the camera body is unchanged.
+===== Battery duration =====
+I tested some batteries for duration in video recording. Some baterries are rather old, some are brand new. The video is automatically split approximately every **1.9 Gb**, using high quality video this means about 22 minutes.
+During the test I experienced some unexpected stops in recording: the camera emitted a beep followed by three short beeps (FIXME check actually) then stopped recording. The camera remained on, the battery was not empty (the ring LED was still blue) and SD card had plenty of space. No overheat was evident: room temperature was about 19 °C and camera body was cold. I just pressed the video button again to start another recording. May be some glitches into the SD card? It was a Samsung 32 EVO microSDHC, Bus UHS-I, UHS Speed Class U1.
+^ Battery Model and Brand     ^ Service Status     ^ Video Recording Duration  ^
+| AZ13-1 Yi original 1010 mA  | Used, 5 years old  | 70 min  |
+| AZ13-1 Kingma 1010 mA       | Used, 5 years old  | 64 min  |
+| AZ13-1 MTB 890 mA           | Brand new          | 89 min  |
 ===== Lens Distortion Correction =====
@@ Line 100: / Line 127: @@
 {{.:yi:yi-cam-lens-distortion-correction.jpg?400|Yi Action Camera - Lens Distortion Correction Off-On Comparison}}
+===== Time-lapse =====
+For **long duration time-lapse**, **remove the battery** and connect an **external power supply** to the micro USB.
+To start a time-lapse video you need the Android app. From the main screen select the **video icon**, then **Timelapse**. Tapping the **INT/LEN** label you can select the **interval** between each frame (from 0.5 to 60 seconds) and the **video length** (from 6 to 120 minutes, or off for manual stop). Once you made the settings, you can disconnect the app and turn off the camera WiFi. Start the time-lapse using the **shot button**. The **camera remains in time-lapse mode** untill you turn it off.
+Do not confuse the **video time-lapse** mode with the **photo time-lapse** mode. From the main screen, **Settings** (gear icon) => **Device Settings** => **Default Photo Mode** you can set the default photo mode:
+^ Photo Modes  ^^
+^ Photo     | Standard single shot mode.  |
+^ Timer     | Shot is taken after an initial wait of 3, 5, 10 or 15 seconds.  |
+^ Burst     | A short burst of poses is taken, you can choose 3p/s, 5p/s, 7p/s or 7p/2s.  |
+^ Timelapse | The interval between shots can be set to 0.5, 1, 2, 5, 10, 30 or 60 seconds.  |
+The photo time-lapse start when you press the shot button; press it again to stop the sequence. The **single photos** are saved, a video is not created.
 ===== The Android App =====