Add Seeed Wio-E5 documentation (#1361)

* doc: Initial files

* doc: Further document

* doc: Further document

* doc: Cleanup

* doc: Add fixes

* doc: Update images

* doc: Small fixes

doc/content/devices/models/seeed-E5/_index.md

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+---
+title: "Seeed Studio Wio-E5"
+description: ""
+weight: 
+---
+
+{{< figure src="wio-e5-mini.png" alt="Image of the Wio-E5 mini" class="float plain" width="80%">}}
+
+The [Seeed Studio Wio-E5 module](https://www.seeedstudio.com/LoRa-LoRaWAN-Modules-c-1950.html) is embedded with the ST system-level package chip STM32WLE5JC, ARM Cortex M4 ultra-low power MCU, and long range SX126X transceiver. It supports EU868, US915 and more frequency bands. It is suitable for wireless sensor networks and other battery-powered IoT devices that require low power consumption and long transmission range.
+
+<!--more-->
+
+In this guide, the Wio-E5 mini board is used, but the onboarding process should be the same for other Wio-E5 boards as well.
+
+## AT Commands
+
+First connect the Wio-E5 mini to your computer via a Type-C cable.
+
+Then open a serial tool (for example the [Arduino IDE's](https://www.arduino.cc/en/software) Serial Monitor), select the correct COM port and set the baud rate to `9600`.
+
+In the serial monitor's message field, type `AT` and press enter. You should see a response back.
+
+{{< figure src="AT.png" alt="Arduino's serial console with the AT command responding." >}}
+
+Next step is to register the device on {{% tts %}}.
+
+## Onboarding to {{% tts %}}
+
+The device can be onboarded using the **Device Repository** or **manually**.
+
+The [LoRaWAN® Device repository](https://github.com/TheThingsNetwork/lorawan-devices) comprises over 800 end-device profiles, including the Wio-E5 mini, which enables quick and easy registration with {{% tts %}}.
+
+To onboard with the **Device Repository**, in the **End device type** section, under **Input method**, select the **Select the end device in the LoRaWAN Device Repository** option. The [Onboarding devices without QR codes]({{< ref "/devices/adding-devices/#onboarding-devices-without-qr-codes" >}}) section of the [Adding Devices]({{< ref "/devices/adding-devices/" >}}) guide explains this procedure in detail. Following details are Wio-E5 mini-specific:
+
+- End device brand: **Seeed Technology Co., Ltd**
+- Model: **Wio-E5 mini (STM32WLE5JC) Dev Board**
+- Hardware Ver.: `1.0`
+- Firmware Ver.: `1.0`
+
+{{< figure src="repository-onboard.png" alt="Settings for registration through device repository" >}}
+
+If you prefer onboarding **manually**, in the **End device type** section, under **Input Method**, select the **Enter end device specifics manually** option. The [Manually adding devices]({{< ref "/devices/adding-devices/manual/" >}}) and [Over the Air Activation (OTAA)]({{< ref "/devices/adding-devices/manual/otaa/" >}}) guides explain this procedure in detail. Following details are specific to the Wio-E5 mini:
+
+- LoRaWAN version: **LoRaWAN Specification 1.0.3**
+- Regional parameters version: **RP001 Regional Parameters 1.0.3 revision A**
+
+{{< figure src="manual.png" width="70%" alt="Settings for manual registration" >}}
+
+Now when you scroll down, you will see the **Provisioning Information** section where you need to enter some values; these values can be obtained from the device itself. To obtain this info from the device, go back to your serial monitor and send the following AT commands on the serial monitor:
+
+- `AT+ID=DevEui` to get your Device EUI
+- `AT+ID=AppEui` to get your App EUI
+
+The output will be as follows:
+
+```
+Tx: AT+ID=DevEui
+Rx: +ID: DevEui, 2C:F7:F1:20:24:90:03:63
+Tx: AT+ID=AppEui
+Rx: +ID: AppEui, 80:00:00:00:00:00:00:07
+```
+
+Now return to {{% tts %}} and enter the details for your device.
+
+Finally, you need to set the `AppKey`. To do this, you can generate an AppKey in {{% tts %}} and program it into the device. Click **Generate** next to the **AppKey** field in {{% tts %}} and **copy** it. Then run the following AT command to program this key into the device:
+
+- `AT+KEY=APPKEY,"generated-appkey"` to set the App Key
+
+The output will be as follows:
+
+```
+Tx: AT+KEY=APPKEY,"2B7E151628AED2A6ABF7158809CF4F3C"
+Rx: +KEY: APPKEY 2B7E151628AED2A6ABF7158809CF4F3C
+```
+
+{{< figure src="prov-info.png" alt="Provisioning Information" width="70%" >}}
+
+After configuring your device, click the **Register end device** button.
+
+Now the device is configured, but we still need to connect it to {{% tts %}}. To do so type the following AT commands:
+
+```
+// If you are using US915
+AT+DR=US915
+AT+CH=NUM,8-15
+
+// If you are using EU868
+AT+DR=EU868
+AT+CH=NUM,0-2
+
+// After running the region command
+AT+MODE=LWOTAA
+AT+JOIN
+```
+
+The output on serial monitor will be as follows:
+
+```
+Tx: AT+DR=EU868
+Rx: +DR: EU868
+Tx: AT+CH=NUM,0-2
+Rx: +CH: NUM, 0-2
+
+Tx: AT+MODE=LWOTAA
+Rx: +MODE: LWOTAA
+
+Tx: AT+JOIN
+Rx: +JOIN: Start
++JOIN: NORMAL
++JOIN: Network joined
++JOIN: NetID 000013 DevAddr 26:01:5F:66
++JOIN: Done
+```
+
+If you see `+JOIN: Network joined` on your serial console, that means your device has successfully connected to {{% tts %}}!
+
+This only explains the basics for connecting to {{% tts %}}. If you wish to know what other commands are available, check [here](https://files.seeedstudio.com/products/317990687/res/LoRa-E5%20AT%20Command%20Specification_V1.0%20.pdf), and if you wish to start developing with the Wio-E5, check the [Seeed Studio Wiki](https://wiki.seeedstudio.com/LoRa_E5_mini/#develop-with-stm32cube-mcu-package).