Merge pull request #894 from luxonis/standalone_update

Update standalone mode docs

Author: Erol444

docs/source/tutorials/standalone_mode.rst

@@ -1,13 +1,33 @@
 Standalone mode
 ===============
 
-**Standalone / Hostless / On-The-Edge mode** means that the OAK camera isn't connected to a host computer. This can
-be achieved by first :ref:`flashing the bootloader <Flash the bootloader>` and then :ref:`flashing the pipeline <Flash the pipeline>`
-and assets (NN models) to the OAK's flash memory.
+**Standalone / Hostless / On-The-Edge mode** means that the camera starts the (:ref:`flashed <Flash the pipeline>`) application as soon as it gets power, without being connected to any particular host computer.
+This is useful for applications where camera is stationary and just inspecting the world and providing analytics (eg. people/vehicle counting, LPR, fall detection, etc.)
+
+Usually, this mode is also more robust to any instabilities (eg. networking issues, where connection between camera and host computer would drop), as application will restart automatically.
 
 Standalone mode is **only possible on OAKs that have on-board flash** memory, which are currently
 `OAK POE <https://docs.luxonis.com/projects/hardware/en/latest/#poe-designs>`__ and OAK IOT camera models.
 
+**Scenarios** when standalone mode is particularly useful:
+
+- People/vehicle/object tracking and counting (People counting `demo here <https://github.com/luxonis/depthai-experiments/tree/master/gen2-people-tracker>`__). Each camera can do its own counting (inside Script node), and only send final count (eg. every hour) to some server via MQTT/HTTP.
+- License Plate Recognition (LPR) camera (`demo here <https://github.com/luxonis/depthai-experiments/tree/master/gen2-license-plate-recognition>`__). Each camera does vehicle detection, license plate detection and LPR, and only reports license plate (in string) to a server.
+- Fall detection for elderly people (`demo here <https://www.youtube.com/watch?v=npiG-Dy7yQ4>`__). Each camera tracks people and checks their poses for any anomalies (eg. person falling down). If anomaly is detected, it sends an alert to a server.
+
+In case you already have a computer on-board (eg. a robot/drone), standalone mode isn't as useful, and just adds extra complexity.
+
+Communication with the camera
+#############################
+
+To "communicate" with the outside world (eg. a server), POE cameras can use :ref:`Script` node to send/receive networking packets (HTTP/TCP/UDP...). Here are a few examples:
+
+- `TCP streaming <https://github.com/luxonis/depthai-experiments/tree/master/gen2-poe-tcp-streaming>`__ (camera being either server or client)
+- `HTTP server <https://docs.luxonis.com/projects/api/en/latest/samples/Script/script_mjpeg_server/#script-mjpeg-server>`__
+- `HTTP client <https://docs.luxonis.com/projects/api/en/latest/samples/Script/script_http_client/>`__
+- `MQTT client <https://github.com/luxonis/depthai-experiments/tree/master/gen2-poe-mqtt>`__
+
+
 Converting a demo to standalone mode
 ####################################
 
@@ -37,8 +57,9 @@ or script node, as mentioned above.
 Flash the bootloader
 ####################
 
+To run the application on the camera, a `Bootloader` is required. Note that bootloader is already flashed on all POE cameras, as it's also required for network booting.
 The :ref:`Bootloader` is packaged together with the depthai, so if you have the latest depthai version, you can flash the
-latest bootloader version. To flash the bootloader, we suggest using the :ref:`Device Manager`. To view the API code behind
+latest bootloader version. To flash the latest bootloader, we suggest using the :ref:`Device Manager`. To view the API code behind
 it, see :ref:`Flash Bootloader` example code.
 
 Flash the pipeline