Mbed OS and Pelion Device Management example for FRDM-K64F and FRDM-K66F boards

Dependencies:   FXAS21002 FXOS8700Q

This example is known to work great on the following platforms:

  • FRDM-K64F - onboard Ethernet and onboard SD card holder.
  • FRDM-K66F - onboard Ethernet and onboard SD card holder.

Follow the Quick-Start instructions: https://cloud.mbed.com/quick-start

FRDM-K64F FRDM-K66F

Example functionality

This example showcases the following device functionality:

  • Read onboard FXOS8700Q accelerometer and magnetometer, and report the values as Pelion LWM2M resources (see image below).
  • (FRDM-K66F only) Read onboard FXAS21002 gyroscope and report the values as Pelion LWM2M resources.
  • On user button click, increment Pelion LWM2M button resource.
  • Allow the user to change the state of the board LED from Pelion LWM2M led_state resource and PUT request.

/media/uploads/screamer/pelion_st_humidity_reading.png?v=2

Use this example with Mbed CLI

1. Import the application into your desktop:

mbed import https://os.mbed.com/teams/NXP/code/pelion-example-frdm

cd pelion-example-frdm

2. Install the CLOUD_SDK_API_KEY

mbed config -G CLOUD_SDK_API_KEY <PELION_DM_API_KEY>

For instructions on how to generate your API key, please see the documentation.

3. Initialize firmware credentials (done once per repository). You can use the following command:

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

If above command do not work for your Mbed CLI, please consider upgrading Mbed CLI to version 1.9.x or above.

4. Compile and program:

mbed compile -t <toolchain> -m <TARGET_BOARD>

(supported toolchains : GCC_ARM / ARM / IAR)

5. You can connect on a virtual terminal/COM port to the platform using:

mbed sterm -b 115200

This should give you an output similar to:

[BOOT] Mbed Bootloader
[BOOT] ARM: 00000000000000000000
[BOOT] OEM: 00000000000000000000
[BOOT] Layout: 0 8374
[BOOT] Active firmware integrity check:
[BOOT] SHA256: 411F422DE8FF545E2D3C373E87D5328162A129314A655AEC32B9A167DE29177E
[BOOT] Version: 1553606618
[BOOT] Slot 0 is empty
[BOOT] Active firmware up-to-date
[BOOT] Application's start address: 0x10400
[BOOT] Application's jump address: 0x112C1
[BOOT] Application's stack address: 0x20030000
[BOOT] Forwarding to application...


Starting Simple Pelion Device Management Client example
You can hold the user button during boot to format the storage and change the device identity.

Sensors configuration:
FXOS8700Q accelerometer = 0xC7
FXOS8700Q magnetometer  = 0xC7
FXAS21002 gyroscope     = 0xB7

Connecting to the network using the default network interface...
Connected to the network successfully. IP address: 10.2.202.65
Initializing Pelion Device Management Client...
Initialized Pelion Device Management Client. Registering...
Press the user button to increment the LwM2M resource value...

FXOS8700Q mag:    0.312 x,   0.039 y,  -1.625 z [gauss]
FXOS8700Q acc:    0.139 x,  -0.123 y,   4.260 z [g]
FXAS21002 gryo:  13.089 x,  13.089 y,  13.089 z [dps]

mbed_app.json

Committer:
screamer
Date:
5 months ago
Revision:
5:f2123dc31d30
Parent:
0:a9d53048f0b6

File content as of revision 5:f2123dc31d30:

{
    "target_overrides": {
        "*": {
            "target.components_remove"                  : ["FLASHIAP"],
            "platform.stdio-baud-rate"                  : 115200,
            "platform.stdio-convert-newlines"           : true,
            "mbed-trace.enable"                         : null,
            "nsapi.default-wifi-security"               : "WPA_WPA2",
            "nsapi.default-wifi-ssid"                   : "\"SSID\"",
            "nsapi.default-wifi-password"               : "\"Password\""
        },
        "K64F": {
            "target.components_add"                     : ["SD"],
            "device-management.flash-start-address"     : "0x0",
            "device-management.flash-size"              : "(1024*1024)",
            "device-management.sotp-section-1-address"  : "(MBED_CONF_APP_FLASH_START_ADDRESS + MBED_CONF_APP_FLASH_SIZE - 2*(4*1024))",
            "device-management.sotp-section-1-size"     : "(4*1024)",
            "device-management.sotp-section-2-address"  : "(MBED_CONF_APP_FLASH_START_ADDRESS + MBED_CONF_APP_FLASH_SIZE - 1*(4*1024))",
            "device-management.sotp-section-2-size"     : "(4*1024)",
            "update-client.application-details"         : "(MBED_CONF_APP_FLASH_START_ADDRESS + 64*1024)",
            "update-client.storage-address"             : "(64*1024*1024)",
            "update-client.storage-size"                : "(2*1024*1024)",
            "update-client.storage-locations"           : "1",
            "target.features_add"                       : ["BOOTLOADER"],
            "target.bootloader_img"                     : "bootloader/mbed-bootloader-K64F.bin",
            "target.header_offset"                      : "0x10000",
            "target.app_offset"                         : "0x10400",
            "button-pressed-state"                      : 0
        },
        "K66F": {
            "target.components_add"                     : ["SD"],
            "device-management.flash-start-address"     : "0x0",
            "device-management.flash-size"              : "(2048*1024)",
            "device-management.sotp-section-1-address"  : "(MBED_CONF_APP_FLASH_START_ADDRESS + MBED_CONF_APP_FLASH_SIZE - 2*(4*1024))",
            "device-management.sotp-section-1-size"     : "(4*1024)",
            "device-management.sotp-section-2-address"  : "(MBED_CONF_APP_FLASH_START_ADDRESS + MBED_CONF_APP_FLASH_SIZE - 1*(4*1024))",
            "device-management.sotp-section-2-size"     : "(4*1024)",
            "update-client.application-details"         : "(MBED_CONF_APP_FLASH_START_ADDRESS + 64*1024)",
            "update-client.storage-address"             : "(64*1024*1024)",
            "update-client.storage-size"                : "(2*1024*1024)",
            "update-client.storage-locations"           : "1",
            "target.features_add"                       : ["BOOTLOADER"],
            "target.bootloader_img"                     : "bootloader/mbed-bootloader-K66F.bin",
            "target.header_offset"                      : "0x10000",
            "target.app_offset"                         : "0x10400",
            "button-pressed-state"                      : 0
        }
    },
    "config": {
        "format-storage-layer-on-error": {
            "help": "Whether to format the storage layer when it cannot be read - always disable for production devices!",
            "value": 1
        },
        "main-stack-size": {
            "value": 6000
        },
        "use-button": {
            "help": "Whether the target has a button",
            "macro_name": "USE_BUTTON",
            "value": true
        },
        "button-pressed-state": {
            "help": "Value of the button when pressed",
            "value": 1
        },
        "no_led": {
            "help": "This flag disables the heartbeat thread in tests. This is useful for platforms that don't have an LED or the LED is used for other functionality like LED on the SPI clockline etc",
            "value": null
        },
        "tests-fs-size": {
            "help": "Maximum size of the file system used for tests",
            "value": null
        }
    }
}