Diff: main.cpp

Revision:

0:a9d53048f0b6

Child:

1:42d51cf7cebe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Mar 25 14:58:08 2019 +0000
@@ -0,0 +1,183 @@
+// ----------------------------------------------------------------------------
+// Copyright 2016-2018 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.
+// ----------------------------------------------------------------------------
+#ifndef MBED_TEST_MODE
+
+#include "mbed.h"
+#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", bd);
+#else
+// Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
+LittleFileSystem fs("fs", bd);
+#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 *button_res;
+MbedCloudClientResource *led_res;
+MbedCloudClientResource *post_res;
+
+// 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;
+
+/**
+ * PUT handler - sets the value of the built-in LED
+ * @param resource The resource that triggered the callback
+ * @param newValue Updated value for the resource
+ */
+void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
+    printf("PUT received. New value: %s\n", newValue.c_str());
+    led = atoi(newValue.c_str());
+}
+
+/**
+ * POST handler - prints the content of the payload
+ * @param resource The resource that triggered the callback
+ * @param buffer If a body was passed to the POST function, this contains the data.
+ *               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 post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
+    printf("POST received (length %u). Payload: ", size);
+    for (size_t ix = 0; ix < size; ix++) {
+        printf("%02x ", buffer[ix]);
+    }
+    printf("\n");
+}
+
+/**
+ * Button handler
+ * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below)
+ */
+void button_press() {
+    int v = button_res->get_value_int() + 1;
+    button_res->set_value(v);
+    printf("Button clicked %d times\n", v);
+}
+
+/**
+ * Notification callback handler
+ * @param resource The resource that triggered the callback
+ * @param status The delivery status of the notification
+ */
+void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
+    printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status);
+}
+
+/**
+ * Registration callback handler
+ * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
+ */
+void registered(const ConnectorClientEndpointInfo *endpoint) {
+    printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
+}
+
+int main(void) {
+    printf("\nStarting Simple Pelion Device Management Client example\n");
+
+#if USE_BUTTON == 1
+    // If the User button is pressed ons start, then format storage.
+    if (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE) {
+        printf("User button is pushed on start. Formatting the storage...\n");
+        int storage_status = StorageHelper::format(&fs, bd);
+        if (storage_status != 0) {
+            printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
+        }
+    } else {
+        printf("You can hold the user button during boot to format the storage and change the device identity.\n");
+    }
+#endif /* USE_BUTTON */
+
+    // Connect to the Internet (DHCP is expected to be on)
+    printf("Connecting to the network using the default network interface...\n");
+    net = NetworkInterface::get_default_instance();
+
+    nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION;
+    while ((net_status = net->connect()) != NSAPI_ERROR_OK) {
+        printf("Unable to connect to network (%d). Retrying...\n", net_status);
+    }
+
+    printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
+
+    printf("Initializing Pelion Device Management Client...\n");
+
+    // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
+    SimpleMbedCloudClient client(net, bd, &fs);
+    int client_status = client.init();
+    if (client_status != 0) {
+        printf("Pelion Client initialization failed (%d)\n", client_status);
+        return -1;
+    }
+
+    // Creating resources, which can be written or read from the cloud
+    button_res = client.create_resource("3200/0/5501", "button_count");
+    button_res->set_value(0);
+    button_res->methods(M2MMethod::GET);
+    button_res->observable(true);
+    button_res->attach_notification_callback(button_callback);
+
+    led_res = client.create_resource("3201/0/5853", "led_state");
+    led_res->set_value(led.read());
+    led_res->methods(M2MMethod::GET | M2MMethod::PUT);
+    led_res->attach_put_callback(put_callback);
+
+    post_res = client.create_resource("3300/0/5605", "execute_function");
+    post_res->methods(M2MMethod::POST);
+    post_res->attach_post_callback(post_callback);
+
+    printf("Initialized Pelion Device Management Client. Registering...\n");
+
+    // Callback that fires when registering is complete
+    client.on_registered(&registered);
+
+    // Register with Pelion DM
+    client.register_and_connect();
+
+#if USE_BUTTON == 1
+    // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
+    button.fall(eventQueue.event(&button_press));
+    printf("Press the user button to increment the LwM2M resource value...\n");
+#else
+    // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
+    Ticker timer;
+    timer.attach(eventQueue.event(&button_press), 5.0);
+    printf("Simulating button press every 5 seconds...\n");
+#endif /* USE_BUTTON */
+
+    // You can easily run the eventQueue in a separate thread if required
+    eventQueue.dispatch_forever();
+}
+
+#endif /* MBED_TEST_MODE */