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:
11:8df4529f060d
Parent:
10:b27c962b3c3f
Child:
12:1f1a50e973db
--- a/main.cpp	Sat Dec 08 01:46:22 2018 +0000
+++ b/main.cpp	Mon Dec 10 10:42:29 2018 +0000
@@ -20,13 +20,13 @@
 #include "simple-mbed-cloud-client.h"
 #include "LittleFileSystem.h"
 
-//#define SENSORS_AND_BUTTONS
+#define SENSORS_AND_BUTTONS
 #ifdef SENSORS_AND_BUTTONS
 #include "HTS221Sensor.h"
 #include "LPS22HBSensor.h"
 #include "LSM6DSLSensor.h"
 #include "lis3mdl_class.h"
-#include "VL53L0X.h"
+// #include "VL53L0X.h"
 
 static DevI2C devI2c(PB_11,PB_10);
 static HTS221Sensor hum_temp(&devI2c);
@@ -34,9 +34,10 @@
 static LSM6DSLSensor acc_gyro(&devI2c,LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW,PD_11); // low address
 static LIS3MDL magnetometer(&devI2c);
 static DigitalOut shutdown_pin(PC_6);
-static VL53L0X range(&devI2c, &shutdown_pin, PC_7);
+// static VL53L0X range(&devI2c, &shutdown_pin, PC_7);
 
 InterruptIn button(USER_BUTTON);
+#define SENSORS_POLL_INTERVAL 1.0
 #endif /* SENSORS_AND_BUTTONS */
 
 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
@@ -51,9 +52,12 @@
 SlicingBlockDevice sd(bd, 0, 2*1024*1024);
 LittleFileSystem fs("fs", &sd);
 
+// Default LED to use for PUT/POST
+DigitalOut led(LED1);
+
 // Declaring pointers for access to Pelion Client resources outside of main()
 MbedCloudClientResource *button_res;
-MbedCloudClientResource *pattern_res;
+MbedCloudClientResource *led_res;
 
 #ifdef SENSORS_AND_BUTTONS
 // Additional resources for sensor readings
@@ -66,21 +70,13 @@
 static const ConnectorClientEndpointInfo* endpointInfo;
 
 /**
- * Button function triggered by the physical button press or by timer depending on SENSORS_AND_BUTTONS macro.
- */
-void button_press() {
-    int v = button_res->get_value_int() + 1;
-    button_res->set_value(v);
-    printf("Button clicked %d times\n", v);
-}
-
-/**
  * PUT handler
  * @param resource The resource that triggered the callback
  * @param newValue Updated value for the resource
  */
-void pattern_updated(MbedCloudClientResource *resource, m2m::String newValue) {
+void led_put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
     printf("PUT received, new value: %s\n", newValue.c_str());
+    led = atoi(newValue.c_str());
 }
 
 /**
@@ -90,27 +86,18 @@
  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
  * @param size Size of the body
  */
-void blink_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
-    printf("POST received. Going to blink LED pattern: %s\n", pattern_res->get_value().c_str());
-
-    static DigitalOut augmentedLed(LED1); // LED that is used for blinking the pattern
+void led_post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
+    printf("POST received. Going to blink LED pattern: %s\n", led_res->get_value().c_str());
+    led = atoi(led_res->get_value().c_str());
+}
 
-    // Parse the pattern string, and toggle the LED in that pattern
-    string s = std::string(pattern_res->get_value().c_str());
-    size_t i = 0;
-    size_t pos = s.find(':');
-    while (pos != string::npos) {
-        wait_ms(atoi(s.substr(i, pos - i).c_str()));
-        augmentedLed = !augmentedLed;
-
-        i = ++pos;
-        pos = s.find(':', pos);
-
-        if (pos == string::npos) {
-            wait_ms(atoi(s.substr(i, s.length()).c_str()));
-            augmentedLed = !augmentedLed;
-        }
-    }
+/**
+ * Button function triggered by the physical button press or by timer depending on SENSORS_AND_BUTTONS macro.
+ */
+void button_press() {
+    int v = button_res->get_value_int() + 1;
+    button_res->set_value(v);
+    printf("Button clicked %d times\n", v);
 }
 
 /**
@@ -131,10 +118,10 @@
     endpointInfo = endpoint;
 }
 
-#ifdef SENSORS_AND_BUTTONS
 /**
  * Initialize sensors
  */
+#ifdef SENSORS_AND_BUTTONS
 void sensors_init() {
     uint8_t id;
 
@@ -143,7 +130,7 @@
     press_temp.init(NULL);
     acc_gyro.init(NULL);
     magnetometer.init(NULL);
-    range.init_sensor(VL53L0X_DEFAULT_ADDRESS);
+    // range.init_sensor(VL53L0X_DEFAULT_ADDRESS);
 
     /// Call sensors enable routines
     hum_temp.enable();
@@ -189,7 +176,7 @@
 
     value1 = value2 = 0.0;
     press_temp.get_temperature(&value1);
-    press_temp.get_pressure(&value2);
+    // press_temp.get_pressure(&value2);
     printf("LPS22HB: [temp] %.2f C, [press] %.2f mbar\r\n", value1, value2);
     printf("Mag/Acc/Gyro readings:        x,      y,      z\r\n");
 
@@ -200,16 +187,16 @@
     acc_gyro.get_g_axes(axes);
     printf("LSM6DSL [gyro/mdps]:     %6ld, %6ld, %6ld\r\n", axes[0], axes[1], axes[2]);
 
-    if (range.get_distance(&distance) == VL53L0X_ERROR_NONE) {
-        printf("VL53L0X [mm]:            %6ld\r\n", distance);
-        if (endpointInfo) {
-            distance_res->set_value((int)distance);
-        }
-    } else {
-        printf("VL53L0X [mm]:                --\r\n");
-    }
+    // if (range.get_distance(&distance) == VL53L0X_ERROR_NONE) {
+    //     printf("VL53L0X [mm]:            %6ld\r\n", distance);
+    //     if (endpointInfo) {
+    //         distance_res->set_value((int)distance);
+    //     }
+    // } else {
+    //     printf("VL53L0X [mm]:                --\r\n");
+    // }
 
-    printf("\033[8A");
+    printf("\033[7A");
 }
 #endif /* SENSORS_AND_BUTTONS */
 
@@ -276,15 +263,6 @@
     button_res->observable(true);
     button_res->attach_notification_callback(button_callback);
 
-    pattern_res = client.create_resource("3201/0/5853", "blink_pattern");
-    pattern_res->set_value("500:500:500:500:500:500:500:500");
-    pattern_res->methods(M2MMethod::GET | M2MMethod::PUT);
-    pattern_res->attach_put_callback(pattern_updated);
-
-    MbedCloudClientResource *blink_res = client.create_resource("3201/0/5850", "blink_action");
-    blink_res->methods(M2MMethod::POST);
-    blink_res->attach_post_callback(blink_callback);
-
 #ifdef SENSORS_AND_BUTTONS
     // Sensor resources
     temperature_res = client.create_resource("3303/0/5700", "temperature");
@@ -297,12 +275,17 @@
     humidity_res->methods(M2MMethod::GET);
     humidity_res->observable(true);
 
-    distance_res = client.create_resource("3330/0/5700", "distance");
-    distance_res->set_value(0);
-    distance_res->methods(M2MMethod::GET);
-    distance_res->observable(true);
+    // distance_res = client.create_resource("3330/0/5700", "distance");
+    // distance_res->set_value(0);
+    // distance_res->methods(M2MMethod::GET);
+    // distance_res->observable(true);
 #endif /* SENSORS_AND_BUTTONS */
 
+    // led_res = client.create_resource("3201/0/5853", "led_state");
+    // led_res->set_value(1);
+    // led_res->methods(M2MMethod::GET | M2MMethod::PUT);
+    // led_res->attach_put_callback(led_put_callback);
+
     printf("Initialized Pelion Client. Registering...\n");
 
     // Callback that fires when registering is complete
@@ -314,10 +297,10 @@
     // Placeholder for callback to update local resource when GET comes.
     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
 #ifdef SENSORS_AND_BUTTONS
-    button.fall(eventQueue.event(button_press));
+    button.fall(eventQueue.event(&button_press));
 
     Ticker timer;
-    timer.attach(eventQueue.event(sensors_update), 3.0);
+    timer.attach(eventQueue.event(&sensors_update), SENSORS_POLL_INTERVAL);
 #else /* SENSORS_AND_BUTTONS */
     Ticker timer;
     timer.attach(eventQueue.event(&button_press), 5.0);