leo hendrickson
/
example-Ethernet-mbed-Cloud-connect
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Diff: main.cpp
- Revision:
- 0:8f0bb79ddd48
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue May 04 08:55:12 2021 +0000 @@ -0,0 +1,233 @@ +// ---------------------------------------------------------------------------- +// 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"); +#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 +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 +// 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 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_temperature; +MbedCloudClientResource *res_voltage; +#endif /* SEND_ALL_SENSORS */ + +// 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 - 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 = 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) + * When the device is registered, this variable will be used to access various useful information, like device ID etc. + */ +void registered(const ConnectorClientEndpointInfo *endpoint) { + printf("Registered 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("\nStarting Simple Pelion Device Management Client example\n"); + + int storage_status = fs.mount(bd); + 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, 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"); + } + + // 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 + 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(led.read()); + res_led->methods(M2MMethod::GET | M2MMethod::PUT); + res_led->attach_put_callback(put_callback); + + res_post = client.create_resource("3300/0/5605", "Execute Function"); + res_post->methods(M2MMethod::POST); + res_post->attach_post_callback(post_callback); + + // Sensor resources + res_temperature = client.create_resource("3303/0/5700", "Temperature (C)"); + 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 Device Management Client. Registering...\n"); + + // Callback that fires when registering is complete + client.on_registered(®istered); + + // Register with Pelion DM + client.register_and_connect(); + + // 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"); + + 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 /* MBED_TEST_MODE */