Workshop example
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
main.cpp
- Committer:
- JimCarver
- Date:
- 2019-05-21
- Revision:
- 35:42b3fba640b1
- Parent:
- 34:a5724eeaaf9d
File content as of revision 35:42b3fba640b1:
// ---------------------------------------------------------------------------- // 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" // Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi. NetworkInterface *net; // Default block device available on the target board BlockDevice* bd = BlockDevice::get_default_instance(); SlicingBlockDevice sd(bd, 0, 2*1024*1024); #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, 1); // How often to fetch sensor data (in seconds) #define SENSORS_POLL_INTERVAL 3.0 // Sensors related includes and initialization // Temperature reading from microcontroller AnalogIn adc_temp(ADC_TEMP); // Voltage reference reading from microcontroller AnalogIn adc_vref(ADC_VREF); // Declaring pointers for access to Pelion Client resources outside of main() MbedCloudClientResource *res_button; MbedCloudClientResource *res_led; MbedCloudClientResource *res_adc_temp; MbedCloudClientResource *res_adc_voltage; // 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; // 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 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 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 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("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str()); endpointInfo = endpoint; } /** * Initialize sensors */ void sensors_init() { printf ("\nSensors configuration:\n"); printf("\n"); ; } /** * Update sensors and report their values. * This function is called periodically. */ void sensors_update() { float temp3_value, volt_value = 0.0; temp3_value = adc_temp.read()*100; volt_value = adc_vref.read(); if (endpointInfo) { res_adc_temp->set_value(temp3_value); res_adc_voltage->set_value(volt_value); } } int main(void) { printf("\nStarting Simple Pelion Device Management Client example\n"); int storage_status = fs.mount(&sd); if (storage_status != 0) { printf("Storage mounting failed.\n"); } // If the User button is pressed ons start, then format storage. bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE); if (btn_pressed) { printf("User button is pushed on start...\n"); } if (storage_status || btn_pressed) { printf("Formatting the storage...\n"); int storage_status = StorageHelper::format(&fs, &sd); 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"); } sensors_init(); // 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()); printf("Initializing Pelion Device Management Client...\n"); // 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(put_callback); res_adc_temp = client.create_resource("3303/2/5700", "Temperature ADC (C)"); res_adc_temp->set_value(0); res_adc_temp->methods(M2MMethod::GET); res_adc_temp->observable(true); res_adc_voltage = client.create_resource("3316/0/5700", "Voltage"); res_adc_voltage->set_value(0); res_adc_voltage->methods(M2MMethod::GET); res_adc_voltage->observable(true); printf("Initialized Pelion Client. Registering...\n"); // Callback that fires when registering is complete client.on_registered(®istered); // Register with Pelion DM client.register_and_connect(); int i = 600; // wait up 60 seconds before attaching sensors and button events 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