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# Pelion Device Ready example for MTB_ADV_WISE_1570 (Advantech WISE-1570)

This application is targetted at Advantech WISE-1570. Specifically MTB_ADV_WISE_1570 which is a reference design using the WISE-1570 module. It is built on mbedOS and uses the "mbed-cloud-client" library to handle the Pelion Platform connection, registration and LWM2M resources. The application simulates a button press every 5 seconds and relays the packet to Arm Pelion IoT platform.

The current version of the example uses: Mbed OS v5.11.0 and Pelion Cloud Client v2.1.1.

# Pre-requisites:
1. Hardware:
    * Module Testbed v. 2.0.0 (MTB)
    * Module Carrier Advantech WISE-1570 v1.0.0. The Module carrier includes 64Mb SPI flash which is used by the Pelion Cloud Client.
    * WISE-1570 sensor node with antenna
    * A micro USB cable
    * A NB-IoT SIM

2. Software:
    * DAPLink for MTB. Download the latest release from https://github.com/ARMmbed/DAPLink/releases. Instructions for flashing and using DAPLink can be found from: https://github.com/ARMmbed/DAPLink/blob/master/docs/USERS-GUIDE.md. The file name is 0250_lpc11u35_mtb_wise1570_0x0000.bin.
    * mbed CLI - https://github.com/ARMmbed/mbed-cli
    * Pelion account for API keys & developer certificate.

# Getting started:

1. Import this example to your local machine.

2. Move into the example directory and run the command ``` mbed deploy ``` to get all the sources downloaded & added to the current directory.
    * Login to your Pelion Cloud account on a browser & follow the steps below:
        * Navigate to Device identity > Certificates
        * Select the certificate created by your account admin and click on "Download Developer C file"
        * Save the file mbed_cloud_dev_credentials.c to the location of the example directory. You have to overwrite the contents of the existing file there.

3. Select UDP (default) or TCP to be used by Pelion Cloud Client in mbed_app.json.
    * For UDP set ```"mcc_transport_mode"                : 2```
    * For TCP set ```"mcc_transport_mode"                : 0```

4.  Run the command ``` mbed compile -t GCC_ARM -m MTB_ADV_WISE_1570 ``` to compile the application. The application has been tested to work with all three compilers GCC_ARM, ARM, IAR.

5. Flash the compiled binary to your device. Open a serial terminal at 115200, 8-N-1 & observe the output.

6. The device starts the example, connects to network & after a few moments connects & registers to Pelion Cloud. It then prints out a device ID. Make a note of this.

* You can now check your simulated button counter's value in the Pelion portal as well.
* Navigate to "Device Directory" in the portal and click on your device's device ID (step 5). This will open up a new drawer on the page.
* Scroll down to LWM2M resource "Button_count" and click on it.
* A new window opens and you will be able to see the counter & a graph increment every time the resource value increments.

7. Congratulations, your device is now connected to Pelion IoT platform. Please proceed to the FW update section now.

# Demonstrate a remote Firmware update:

1. Now you need to setup Mbed OS on the device to receive FW updates:
	* Login to your Pelion Cloud portal.
	* Create an API device key (Access Management -> API Keys -> Create a new API key)
	* Ensure you copy the API key generated as this is visible only once.

2. Install the `CLOUD_SDK_API_KEY`

   `mbed config -G CLOUD_SDK_API_KEY ak_1MDE1...<snip>`

3. Initialize the certificates for your application:

   ``` mbed dm init -d "<your company name in Pelion DM>" --model-name "<product-model-identifier>" -q --force ```

   The domain name must have a ".com" as a mandatory requirement and the model name can be an string of your choice.

### Note the use of --force as this option overrides the defaults provided in the application. This is a mandatory parameter.

## IMPORTANT: You must initialize the certificates before you flash the device as these certificates need to be embedded within the device in order for it to receive remote updates.

4. With the certificates initialized, there will now be a ".update-certificates" directory created within the application's root directory.

5. Now, compile the application:
``` mbed compile -t GCC_ARM -m MTB_ADV_WISE_1570 ```

6. Program your device with the .hex file just generated. You can either drag-drop via the GUI of your OS or you can use the corresponding copy command from the terminal for your OS.

7. Open a serial terminal application such as PuTTY and observe the output. You will notice the device boots up, connects to the network, starts Pelion Cloud Client and registers to the Cloud.

8. Once the device registers, make a note of the device ID assigned to the device.

9. Modify the main.cpp in the source directory to add a small printf statement - this is already provided in the code. So, you can un-comment this line in order to demo a FW update.

10. Use the mbed tool to perform a remote update on the device:

   ``` mbed dm update device -D <device ID> -t GCC_ARM -m MTB_ADV_WISE_1570 ```

   where device ID is the one obtained from step 8.

### Note for UDP the update campaign needs to be started in 30 second window after registering. In case you miss this window, just reboot the device, wait for it to register + 30 seconds, and the update should start. This is required because with UDP the only way to start  update campaign is to forcibly trigger re-registration to cloud. This is implemented in the main.cpp and only used when UDP is enabled.

11. You will notice from the serial terminal that the device gets a request to update the FW, then this is authorized, then the download of the new FW starts, finishes and the bootloader verifies the authencity of the new FW, installs it on the device and reboots.

12. You will now notice the new printf statement appear on the device logs which indicates that the newly built application binary is now installed and running on the device i.e. the device has been remotely updated.

   The success logs should look like the below on a serial terminal, although your device *will* be assigned a different device ID and will have a different IP address.

```
mbed sterm -b 115200 -r

[BOOT] Mbed Bootloader
[BOOT] ARM: 00000000000000000000
[BOOT] OEM: 00000000000000000000
[BOOT] Layout: 0 8007698
[BOOT] Active firmware integrity check:
[BOOT] SHA256: 8A9C5CDF457A2EFD94A36FEC10934C292516249D93F899691000D5E2BD75B2DE
[BOOT] Version: 1547631154
[BOOT] Slot 0 is empty
[BOOT] Active firmware up-to-date
[BOOT] Application's start address: 0x8008400
[BOOT] Application's jump address: 0x802E5C5
[BOOT] Application's stack address: 0x10008000
[BOOT] Forwarding to application...

Starting Simple Pelion Device Management Client example
Connecting to the network...
Connected to the network successfully. IP address: 10.41.80.23
Initialized Pelion Client. Registering...
Simulated button clicked 1 times
Simulated button clicked 2 times
Simulated button clicked 3 times
Simulated button clicked 4 times
Simulated button clicked 5 times
Simulated button clicked 6 times
Simulated button clicked 7 times
Simulated button clicked 8 times
Simulated button clicked 9 times
Simulated button clicked 10 times
Connected to Pelion Device Management. Endpoint Name: 01685603810f00000000000100100300
Simulated button clicked 11 times
Simulated button clicked 12 times
Simulated button clicked 13 times
Simulated button clicked 14 times
Simulated button clicked 15 times
Simulated button clicked 16 times
Firmware download requested
Authorization granted
Simulated button clicked 17 times
Downloading: [\                                                 ] 0 %Simulated button clicked 18 times
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Downloading: [++++++++++++++++++++++++++++++++++++++++++++++++++] 100 %
Download completed
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Firmware install requested
Authorization granted
[BOOT] Mbed Bootloader
[BOOT] ARM: 00000000000000000000
[BOOT] OEM: 00000000000000000000
[BOOT] Layout: 0 8007698
[BOOT] Active firmware integrity check:
[BOOT] SHA256: 8A9C5CDF457A2EFD94A36FEC10934C292516249D93F899691000D5E2BD75B2DE
[BOOT] Version: 1547631154
[BOOT] Slot 0 firmware integrity check:
[BOOT] SHA256: 8A9C5CDF457A2EFD94A36FEC10934C292516249D93F899691000D5E2BD75B2DE
[BOOT] Version: 1547631342
[BOOT] Update active firmware using slot 0:
[BOOT] Verify new active firmware:
[BOOT] New active firmware is valid
[BOOT] Application's start address: 0x8008400
[BOOT] Application's jump address: 0x802E5C5
[BOOT] Application's stack address: 0x10008000
[BOOT] Forwarding to application...

Starting Simple Pelion Device Management Client example
FW updated OTA
Connecting to the network...
Connected to the network successfully. IP address: 10.41.80.5
Initialized Pelion Client. Registering...
Simulated button clicked 1 times
Simulated button clicked 2 times
Simulated button clicked 3 times
Simulated button clicked 4 times
Simulated button clicked 5 times
Simulated button clicked 6 times
Simulated button clicked 7 times
Simulated button clicked 8 times
Connected to Pelion Device Management. Endpoint Name: 01685614c62f00000000000100100230
Simulated button clicked 9 times
Simulated button clicked 10 times
Simulated button clicked 11 times
Simulated button clicked 12 times
Simulated button clicked 13 times
Simulated button clicked 14 times
Simulated button clicked 15 times

```

## Also note that the device ID remains the same after the FW update. This indicates that the SOTP regions were not over-written while perfoming the update.

# Flash and static RAM usage
Default profile, GCC_ARM:
Total Static RAM memory (data + bss): 30752(+30752) bytes
Total Flash memory (text + data): 414014(+414014) bytes

Default profile, ARM:
Total Static RAM memory (data + bss): 28742(+28742) bytes
Total Flash memory (text + data): 413517(+413517) bytes

Default profile, IAR:
Total Static RAM memory (data + bss): 28665(+28665) bytes
Total Flash memory (text + data): 356185(+356185) bytes

Release profile, GCC_ARM:
Total Static RAM memory (data + bss): 30752(+30752) bytes
Total Flash memory (text + data): 396433(+396433) bytes

Release profile, ARM:
Total Static RAM memory (data + bss): 28742(+28742) bytes
Total Flash memory (text + data): 348980(+348980) bytes

Release profile, IAR:
Total Static RAM memory (data + bss): 28658(+28658) bytes
Total Flash memory (text + data): 323198(+323198) bytes

# Dynamic RAM usage (approximate, measurement affects results)

Debug profile, GCC_ARM:
Unable to measure. Out of memory due to measurement mode overhead.

Debug profile, ARM:
Unable to measure. Out of memory due to measurement mode overhead.

Debug profile, IAR:
Unable to measure. Out of memory due to measurement mode overhead.

Release profile (max used / available), GCC_ARM:
56525 / 67552

Release profile (max used / available), ARM:
54613 / 68384

Release profile (max used / available), IAR:
52901 / 65536