Mbed OS and Pelion Device Management example over WIFI for DISCO_L475VG_IOT01 board

Dependencies:   X_NUCLEO_COMMON ST_INTERFACES

DEPRECATED

This example application is not maintained and not recommended. It uses an old version of Mbed OS, Pelion DM and Arm toolchain. It doesn't work with Mbed Studio.

Please use: https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-pelion/

This example is known to work on the following platforms:

DISCO_L475E_IOT01A

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

Example functionality

This example showcases the following device functionality:

  • Read onboard temperature and humidity sensors, and report them as Pelion LWM2M resources (see image below).
  • 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.
  • Uses all onboard sensors and reports them as Pelion LWM2M resources.

/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/ST/code/pelion-example-disco-iot01

cd pelion-example-disco-iot01

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 1.8.x or above.

4. Compile and program:

mbed compile -t <toolchain> -m DISCO_L475VG_IOT01A

(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 80096F4
[BOOT] Active firmware integrity check:
[BOOT] SHA256: 0660E360D432225D5251461998FD8617B017098C5F1F90D5FB607BF8C27ED530
[BOOT] Version: 1553615309
[BOOT] Slot 0 is empty
[BOOT] Active firmware up-to-date
[BOOT] Application's start address: 0x8010400
[BOOT] Application's jump address: 0x8011041
[BOOT] Application's stack address: 0x20018000
[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:
Invalid new address!
HTS221  humidity & temperature    = 0xBC
LPS22HB pressure & temperature    = 0xB1
LIS3MDL magnetometer              = 0x3D
LSM6DSL accelerometer & gyroscope = 0x6A

Connecting to the network using Wifi...
Connected to the network successfully. IP address: 192.168.1.3
Initializing Pelion Device Management Client...
Initialized Pelion Client. Registering...
Registered to Pelion Device Management. Endpoint Name: 0169********************001002d5

ADC temp:     23.0037 C,  vref:      0.3661 V
HTS221 temp:   28.700 C,  humidity:   31.90 %
LPS22HB temp:  29.600 C,  pressure: 1032.01 mbar
LIS3MDL mag:    0.217 x,  -0.284 y,  -0.053 z [gauss]
LSM6DSL acc:    0.005 x,  -0.014 y,   1.029 z [g]
LSM6DSL gyro:   0.910 x,  -0.910 y,   1.120 z [dps]
VL53L0X dist:    1855 mm

main.cpp

Committer:
adustm
Date:
2018-02-23
Revision:
1:e86b1cffc402
Child:
4:cf7342047b4d

File content as of revision 1:e86b1cffc402:

// ----------------------------------------------------------------------------
// Copyright 2016-2017 ARM Ltd.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ----------------------------------------------------------------------------

#include "mbed.h"
#include "mbed-trace/mbed_trace.h"
#include "mbed-trace-helper.h"
#include "simple-mbed-cloud-client.h"
#include "key-config-manager/kcm_status.h"
#include "key-config-manager/key_config_manager.h"
#include "SDBlockDevice.h"
#include "FATFileSystem.h"
#include "ISM43362Interface.h"

// Placeholder to hardware that trigger events (timer, button, etc)
Ticker timer;

// Placeholder for storage
SDBlockDevice sd(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS);
FATFileSystem fs("sd");

// Pointers to the resources that will be created in main_application().
static MbedCloudClientResource* pattern_ptr;

// Pointer to mbedClient, used for calling close function.
static SimpleMbedCloudClient *client;

static bool button_pressed = false;

void button_press() {
    button_pressed = true;
}

void pattern_updated(const char *) {
    printf("PUT received, new value: %s\n", pattern_ptr->get_value().c_str());
    // Placeholder for PUT action
}

void blink_callback(void *) {
    String pattern_str = pattern_ptr->get_value();
    const char *pattern = pattern_str.c_str();
    printf("POST received. LED pattern = %s\n", pattern);
    // Placeholder for POST action
    // The pattern is something like 500:200:500, so parse that.
}

void button_callback(const M2MBase& object, const NoticationDeliveryStatus status)
{
    printf("Button notification. Callback: (%s)\n", object.uri_path());
    // Placeholder for GET
}


int main(void)
{
    // Requires DAPLink 245+ (https://github.com/ARMmbed/DAPLink/pull/364)
    // Older versions: workaround to prevent possible deletion of credentials:
    wait(2);

    // Misc OS setup
    srand(time(NULL));

    // Placeholder for network
    printf("Start Simple Mbed Cloud Client\n");
    ISM43362Interface net(MBED_CONF_APP_WIFI_SPI_MOSI, MBED_CONF_APP_WIFI_SPI_MISO, MBED_CONF_APP_WIFI_SPI_SCLK, MBED_CONF_APP_WIFI_SPI_NSS, MBED_CONF_APP_WIFI_RESET, MBED_CONF_APP_WIFI_DATAREADY, MBED_CONF_APP_WIFI_WAKEUP, false);


    // Initialize SD card
    int status = sd.init();
    if (status != BD_ERROR_OK) {
        printf("Failed to init SD card\r\n");
        return -1;
    }

    // Mount the file system (reformatting on failure)
    status = fs.mount(&sd);
    if (status) {
        printf("Failed to mount FAT file system, reformatting...\r\n");
        status = fs.reformat(&sd);
        if (status) {
            printf("Failed to reformat FAT file system\r\n");
            return -1;
        } else {
            printf("Reformat and mount complete\r\n");
        }
    }

    printf("Connecting to the network using Wifi...\n");

    status = net.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, (strlen(MBED_CONF_APP_WIFI_PASSWORD) > 1) ? NSAPI_SECURITY_WPA_WPA2 : NSAPI_SECURITY_NONE);
    if (status) {
        printf("Connection to Network Failed %d!\n", status);
        return -1;
    } else {
        const char *ip_addr  = net.get_ip_address();
        printf("Connected successfully\n");
        printf("IP address %s\n", ip_addr);
    }

    SimpleMbedCloudClient mbedClient(&net);
    // Save pointer to mbedClient so that other functions can access it.
    client = &mbedClient;

    status = mbedClient.init();
    if (status) {
        printf("FAILED\r\n");
        return -1;
    }

    printf("Client initialized\r\n");

    // Mbed Cloud Client resource setup
    MbedCloudClientResource *button = mbedClient.create_resource("3200/0/5501", "button_resource");
    button->set_value("0");
    button->methods(M2MMethod::GET);
    button->observable(true);
    button->attach_notification_callback(button_callback);

    MbedCloudClientResource *pattern = mbedClient.create_resource("3201/0/5853", "pattern_resource");
    pattern->set_value("500:500:500:500");
    pattern->methods(M2MMethod::GET | M2MMethod::PUT);
    pattern->attach_put_callback(pattern_updated);
    pattern_ptr = pattern;

    MbedCloudClientResource *blink = mbedClient.create_resource("3201/0/5850", "blink_resource");
    blink->methods(M2MMethod::POST);
    blink->attach_post_callback(blink_callback);

    mbedClient.register_and_connect();

    // Wait for client to finish registering
    while (!mbedClient.is_client_registered()) {
        wait_ms(100);
    }

    // Placeholder for callback to update local resource when GET comes.
    timer.attach(&button_press, 5.0);

    // Check if client is registering or registered, if true sleep and repeat.
    while (mbedClient.is_register_called()) {
        static int button_count = 0;
        wait_ms(100);

        if (button_pressed) {
            button_pressed = false;
            printf("Simulated button clicked %d times\r\n", ++button_count);
            button->set_value(button_count);
        }
    }

    // Client unregistered, exit program.
    return 0;
}