NXP / Mbed OS pelion-example-frdm

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]

Diff: main.cpp

Revision:
5:f2123dc31d30
Parent:
4:ec3c125c37bf
--- a/main.cpp	Tue Mar 26 13:56:38 2019 +0000
+++ b/main.cpp	Wed Mar 27 17:49:40 2019 +0000
@@ -21,6 +21,33 @@
 #include "simple-mbed-cloud-client.h"
 #include "FATFileSystem.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 = NetworkInterface::get_default_instance();
+
+// Default block device available on the target board
+BlockDevice *bd = BlockDevice::get_default_instance();
+
+#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, 0);
+
+// 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 "FXOS8700Q.h"
 #include "FXAS21002.h"
 
@@ -36,34 +63,12 @@
 FXAS21002 sens_gyro(PTD9, PTD8, 0x20);
 #endif /* TARGET_K66F */
 
-#define SENSORS_POLL_INTERVAL 3.0
-#define SEND_ALL_SENSORS
-
-// Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
-NetworkInterface *net = NetworkInterface::get_default_instance();
-
-// Default block device available on the target board
-BlockDevice *bd = BlockDevice::get_default_instance();
-
-#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
-
-#if USE_BUTTON == 1
-InterruptIn button(BUTTON1);
-#endif /* USE_BUTTON */
-
-// Default LED to use for PUT/POST example
-DigitalOut led(LED1);
-
 // Declaring pointers for access to Pelion Device Management Client resources outside of main()
 MbedCloudClientResource *res_button;
 MbedCloudClientResource *res_led;
 MbedCloudClientResource *res_post;
+
+// Additional resources for sensor readings
 #ifdef SEND_ALL_SENSORS
 MbedCloudClientResource *res_magnometer_x;
 MbedCloudClientResource *res_magnometer_y;