Diff: main.cpp

Revision:

0:2b6d1f2f42fa

diff -r 000000000000 -r 2b6d1f2f42fa main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 25 14:38:52 2019 +0200
@@ -0,0 +1,192 @@
+// ----------------------------------------------------------------------------
+// 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 "LittleFileSystem.h"
+#include "mbed_shared_queues.h"
+
+// 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 block device
+BlockDevice *bd = BlockDevice::get_default_instance();
+LittleFileSystem fs("fs");
+StorageHelper sh(bd, &fs);
+
+// Default network interface object
+NetworkInterface *net = NetworkInterface::get_default_instance();
+
+// Declaring pointers for access to Pelion Device Management Client resources outside of main()
+MbedCloudClientResource *button_res;
+MbedCloudClientResource *pattern_res;
+
+// SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
+SimpleMbedCloudClient *client;
+
+// shared EventQueue for scheduling client re-registration
+events::EventQueue      *_shared_queue = mbed::mbed_event_queue();
+
+// This function gets triggered by the timer. It's easy to replace it by an InterruptIn and fall() mode on a real button
+void fake_button_press() {
+    int v = button_res->get_value_int() + 1;
+
+    button_res->set_value(v);
+
+    printf("Simulated 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) {
+    printf("PUT received, new value: %s\n", newValue.c_str());
+}
+
+/**
+ * POST handler
+ * @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 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
+
+    // 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;
+        }
+    }
+}
+
+/**
+ * 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);
+}
+
+#if defined(MBED_CLOUD_CLIENT_TRANSPORT_MODE_UDP) || defined(MBED_CLOUD_CLIENT_TRANSPORT_MODE_UDP_QUEUE)
+static bool register_update_called = false;
+/**
+ * shared EventQueue callback handler for client re-registration
+ */
+static void reregister_callback(void)
+{
+    client->register_update();
+}
+#endif
+
+/**
+ * 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("Connected to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
+
+    /* When using UDP, start re-registration 30s after initial registration. Allows update campaign to start. */
+    #if defined(MBED_CLOUD_CLIENT_TRANSPORT_MODE_UDP) || defined(MBED_CLOUD_CLIENT_TRANSPORT_MODE_UDP_QUEUE)
+    if(!register_update_called) {
+        register_update_called = true;
+        _shared_queue->call_in(30000, reregister_callback);
+    }
+    #endif
+}
+
+int main(void) {
+    // Call StorageHelper to initialize FS for us
+    sh.init();
+
+    // Initialize client only after making sure FS is ready
+    client = new SimpleMbedCloudClient(net, bd, &fs);
+
+    printf("Starting Simple Pelion Device Management Client example\n");
+    //Uncomment the following line to demonstrate update
+    //printf("FW updated OTA\n");
+    printf("Connecting to the network...\n");
+
+    // Connect to the internet (DHCP is expected to be on)
+    nsapi_error_t status = net->connect();
+
+    if (status != NSAPI_ERROR_OK) {
+        printf("Connecting to the network failed %d!\n", status);
+        return -1;
+    }
+
+    printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
+
+    // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
+    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);
+
+    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);
+
+    printf("Initialized Pelion Client. Registering...\n");
+
+    // Callback that fires when registering is complete
+    client->on_registered(&registered);
+
+    // Register with Pelion Device Management
+    client->register_and_connect();
+
+    // 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
+    Ticker timer;
+    timer.attach(eventQueue.event(&fake_button_press), 5.0);
+
+    // You can easily run the eventQueue in a separate thread if required
+    eventQueue.dispatch_forever();
+}
+#endif