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
Revision:
33:cfd9430e7d1e
Parent:
32:2871fbeb627d
Child:
34:a5724eeaaf9d
--- a/main.cpp	Tue Mar 26 15:56:37 2019 +0000
+++ b/main.cpp	Wed Mar 27 17:47:34 2019 +0000
@@ -15,12 +15,39 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 // ----------------------------------------------------------------------------
-
 #ifndef MBED_TEST_MODE
 
 #include "mbed.h"
 #include "simple-mbed-cloud-client.h"
 #include "LittleFileSystem.h"
+
+// Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
+NetworkInterface *net;
+
+// Default block device available on the target board
+BlockDevice* bd = BlockDevice::get_default_instance();
+SlicingBlockDevice sd(bd, 0, 2*1024*1024);
+
+#if COMPONENT_SD || COMPONENT_NUSD
+// Use FATFileSystem for SD card type blockdevices
+FATFileSystem fs("fs");
+#else
+// Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
+LittleFileSystem fs("fs");
+#endif
+
+// Default User button for GET example and for resetting the storage
+InterruptIn button(BUTTON1);
+// Default LED to use for PUT/POST example
+DigitalOut led(LED1, 1);
+
+// How often to fetch sensor data (in seconds)
+#define SENSORS_POLL_INTERVAL 3.0
+
+// Send all sensor data or just limited (useful for when running out of memory)
+#define SEND_ALL_SENSORS
+
+// Sensors related includes and initialization
 #include "HTS221Sensor.h"
 #include "LPS22HBSensor.h"
 #include "LSM6DSLSensor.h"
@@ -34,42 +61,19 @@
 static LIS3MDL sen_mag(&devI2c);
 static DigitalOut shutdown_pin(PC_6);
 static VL53L0X sen_distance(&devI2c, &shutdown_pin, PC_7);
-
-#define SENSORS_POLL_INTERVAL 3.0
-#define SEND_ALL_SENSORS
-
-// An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
-// This is great because things such as network operations are illegal in ISR, so updating a resource in a button's fall() function is not allowed
-EventQueue eventQueue;
-
-// Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
-NetworkInterface *net;
-
-// Default block device
-BlockDevice* bd = BlockDevice::get_default_instance();
-SlicingBlockDevice sd(bd, 0, 2*1024*1024);
-LittleFileSystem fs("fs");
-
-// Default User button for GET example
-InterruptIn button(BUTTON1);
-// Default LED to use for PUT/POST example
-DigitalOut led(LED1);
+// Temperature reading from microcontroller
+AnalogIn adc_temp(ADC_TEMP);
+// Voltage reference reading from microcontroller
+AnalogIn adc_vref(ADC_VREF);
 
 // Declaring pointers for access to Pelion Client resources outside of main()
 MbedCloudClientResource *res_button;
 MbedCloudClientResource *res_led;
 
+// Additional resources for sensor readings
 #ifdef SEND_ALL_SENSORS
-// Temperature reading from microcontroller
-AnalogIn adc_temp(ADC_TEMP);
-// Voltage reference reading from microcontroller
-AnalogIn adc_vref(ADC_VREF);
-#endif
-
-// Additional resources for sensor readings
 MbedCloudClientResource *res_humidity;
 MbedCloudClientResource *res_temperature;
-#ifdef SEND_ALL_SENSORS
 MbedCloudClientResource *res_pressure;
 MbedCloudClientResource *res_temperature2;
 MbedCloudClientResource *res_magnometer_x;
@@ -86,6 +90,10 @@
 MbedCloudClientResource *res_adc_voltage;
 #endif /* SEND_ALL_SENSORS */
 
+// An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
+// This is great because things such as network operations are illegal in ISR, so updating a resource in a button's fall() function is not allowed
+EventQueue eventQueue;
+
 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
 static const ConnectorClientEndpointInfo* endpointInfo;
 
@@ -215,9 +223,9 @@
     printf("\r\033[8A");
 
     if (endpointInfo) {
+#ifdef SEND_ALL_SENSORS
         res_humidity->set_value(humid_value);
         res_temperature->set_value(temp1_value);
-#ifdef SEND_ALL_SENSORS
         res_pressure->set_value(pressure_value);
         res_temperature2->set_value(temp2_value);
         res_magnometer_x->set_value(mag_x);
@@ -303,6 +311,12 @@
     res_button->observable(true);
     res_button->attach_notification_callback(button_callback);
 
+    res_led = client.create_resource("3201/0/5853", "LED State");
+    res_led->set_value(1);
+    res_led->methods(M2MMethod::GET | M2MMethod::PUT);
+    res_led->attach_put_callback(put_callback);
+
+#ifdef SEND_ALL_SENSORS
     // Sensor resources
     res_temperature = client.create_resource("3303/0/5700", "Temperature HTS221 (C)");
     res_temperature->set_value(0);
@@ -314,7 +328,6 @@
     res_humidity->methods(M2MMethod::GET);
     res_humidity->observable(true);
 
-#ifdef SEND_ALL_SENSORS
     res_temperature2 = client.create_resource("3303/1/5700", "Temperature LPS22HB (C)");
     res_temperature2->set_value(0);
     res_temperature2->methods(M2MMethod::GET);
@@ -384,11 +397,6 @@
     res_distance->set_value((float)999.9);
     res_distance->methods(M2MMethod::GET);
     res_distance->observable(true);
-
-    res_led = client.create_resource("3201/0/5853", "LED State");
-    res_led->set_value(1);
-    res_led->methods(M2MMethod::GET | M2MMethod::PUT);
-    res_led->attach_put_callback(put_callback);
 #endif /* SEND_ALL_SENSORS */
 
     printf("Initialized Pelion Client. Registering...\n");