Diff: main.cpp

Revision:

0:a076a1bbe630

Child:

1:a50c1e691ff1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 10 21:58:43 2018 +0000
@@ -0,0 +1,217 @@
+// ----------------------------------------------------------------------------
+// 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"
+
+// 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
+NetworkInterface *net = NetworkInterface::get_default_instance();
+
+// Default block device
+BlockDevice *bd = BlockDevice::get_default_instance();
+SlicingBlockDevice sd(bd, 0, 2*1024*1024);
+LittleFileSystem fs("fs", &sd);
+
+// Default User button for GET example
+InterruptIn button(USER_BUTTON);
+// Default LED to use for PUT/POST example
+DigitalOut led(LED1);
+// Default temperature reading from microcontroller
+AnalogIn adc_temp(ADC_TEMP);
+// Voltage reference from microcontroller
+AnalogIn adc_vref(ADC_VREF);
+
+#define SENSORS_POLL_INTERVAL 1.0
+
+// Declaring pointers for access to Pelion Client resources outside of main()
+MbedCloudClientResource *res_button;
+MbedCloudClientResource *res_led;
+MbedCloudClientResource *res_temperature;
+MbedCloudClientResource *res_voltage;
+
+// When the device is registered, this variable will be used to access various useful information, like device ID etc.
+static const ConnectorClientEndpointInfo* endpointInfo;
+
+/**
+ * PUT handler
+ * @param resource The resource that triggered the callback
+ * @param newValue Updated value for the resource
+ */
+void led_put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
+    printf("PUT received, new value: %s\n", newValue.c_str());
+    led = atoi(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 led_post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
+    printf("POST received. Going to blink LED pattern: %s\n", res_led->get_value().c_str());
+    led = atoi(res_led->get_value().c_str());
+}
+
+/**
+ * Button function triggered by the physical button press.
+ */
+void button_press() {
+    int v = res_button->get_value_int() + 1;
+    res_button->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("Connected to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
+    endpointInfo = endpoint;
+}
+
+/**
+ * Update sensors and report their values.
+ * This function is called periodically.
+ */
+void sensors_update() {
+    float temp = adc_temp.read()*100;
+    float vref = adc_vref.read();
+    printf("ADC temp:  %6.4f C,  vref: %6.4f %%\r\n", temp, vref);
+    if (endpointInfo) {
+        res_temperature->set_value(temp);
+        res_voltage->set_value(vref);
+    }
+}
+
+
+int main(void) {
+    printf("Starting Simple Pelion Device Management Client example\n");
+
+    // If the User button is pressed ons start, then format storage.
+    const int PRESSED = 1;
+    DigitalIn *user_button = new DigitalIn(USER_BUTTON);
+    if (user_button->read() == PRESSED) {
+        printf("User button is pushed on start. Formatting the storage...\n");
+        int storage_status = fs.reformat(&sd);
+        if (storage_status != 0) {
+            if (sd.erase(0, sd.size()) == 0) {
+                if (fs.format(&sd) == 0) {
+                    storage_status = 0;
+                    printf("The storage reformatted successfully.\n");
+                }
+            }
+        }
+        if (storage_status != 0) {
+            printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
+        }
+    }
+
+    // Connect to the internet (DHCP is expected to be on)
+    printf("Connecting to the network using Wifi...\n");
+    net = NetworkInterface::get_default_instance();
+
+    nsapi_error_t net_status = -1;
+    for (int tries = 0; tries < 3; tries++) {
+        net_status = net->connect();
+        if (net_status == NSAPI_ERROR_OK) {
+            break;
+        } else {
+            printf("Unable to connect to network. Retrying...\n");
+        }
+    }
+
+    if (net_status != NSAPI_ERROR_OK) {
+        printf("ERROR: Connecting to the network failed (%d)!\n", net_status);
+        return -1;
+    }
+
+    printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
+
+    // SimpleMbedCloudClient handles registering over LwM2M to Pelion DM
+    SimpleMbedCloudClient client(net, bd, &fs);
+    int client_status = client.init();
+    if (client_status != 0) {
+        printf("ERROR: Pelion Client initialization failed (%d)\n", client_status);
+        return -1;
+    }
+
+    // Creating resources, which can be written or read from the cloud
+    res_button = client.create_resource("3200/0/5501", "button_count");
+    res_button->set_value(0);
+    res_button->methods(M2MMethod::GET);
+    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(led_put_callback);
+
+    // Sensor resources
+    res_temperature = client.create_resource("3303/0/5700", "temperature");
+    res_temperature->set_value(0);
+    res_temperature->methods(M2MMethod::GET);
+    res_temperature->observable(true);
+
+    res_voltage = client.create_resource("3316/0/5700", "voltage");
+    res_voltage->set_value(0);
+    res_voltage->methods(M2MMethod::GET);
+    res_voltage->observable(true);
+
+    printf("Initialized Pelion Client. Registering...\n");
+
+    // Callback that fires when registering is complete
+    client.on_registered(&registered);
+
+    // Register with Pelion DM
+    client.register_and_connect();
+
+    int i = 600; // wait 60 seconds
+    while (i-- > 0 && !client.is_client_registered()) {
+        wait_ms(100);
+    }
+
+    button.fall(eventQueue.event(&button_press));
+
+    // 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(&sensors_update), SENSORS_POLL_INTERVAL);
+
+    // You can easily run the eventQueue in a separate thread if required
+    eventQueue.dispatch_forever();
+}
+#endif