Example program for simple-mbed-client, connecting a device to mbed Device Connector.
Dependencies: simple-mbed-client
Fork of simple-mbed-client-example by
This is an example on how to connect to mbed Device Connector using simple-mbed-client. It can connect over Ethernet, WiFi (using an ESP8266 module or an ODIN board), Thread and 6LoWPAN.
After cloning this repository update `mbed_app.json` to reflect your connectivity method. For docs on configuring connectivity, see easy-connect.
End to end example
For an end-to-end example of using Simple mbed Client to connect devices to mbed Device Connector see Building an internet connected lighting system.
Entropy (or lack thereof)
On all platforms except the K64F and K22F the library is compiled without TLS entropy sources. This means that your code is inherently unsafe and should not be deployed to any production systems. To enable entropy, remove the MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
and MBEDTLS_TEST_NULL_ENTROPY
macros from mbed_app.json.
Diff: source/main.cpp
- Revision:
- 38:fbbab77b54fb
- Parent:
- 35:4b11d20d60e9
- Child:
- 40:6c039d073c0b
diff -r 70eaf98b5486 -r fbbab77b54fb source/main.cpp --- a/source/main.cpp Fri Dec 02 18:22:46 2016 +0800 +++ b/source/main.cpp Tue Feb 07 13:02:40 2017 +0100 @@ -3,14 +3,12 @@ #include "easy-connect.h" #include "simple-mbed-client.h" -EventQueue eventQueue(32 * EVENTS_EVENT_SIZE); // Event queue! - SimpleMbedClient client; // Declare peripherals -DigitalOut connectivityLed(LED2); // Blinks while connecting, turns solid when connected -DigitalOut augmentedLed(LED1, BUILTIN_LED_OFF); // LED that can be controlled through Connector -InterruptIn btn(MBED_CONF_APP_BUTTON); // Button that sends it's count to Connector +DigitalOut connectivityLed(LED2); // Blinks while connecting, turns solid when connected +DigitalOut augmentedLed(LED1, BUILTIN_LED_OFF); // LED that can be controlled through Connector +InterruptIn btn(MBED_CONF_APP_BUTTON); // Button that sends it's count to Connector Ticker connectivityTicker; @@ -43,33 +41,44 @@ connectivityLed = BUILTIN_LED_OFF; // Parse the pattern string, and toggle the LED in that pattern - stringstream ss(pattern); - string item; - while(getline(ss, item, ':')) { - wait_ms(atoi((const char*)item.c_str())); + string s = static_cast<string>(pattern); + 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; + } } augmentedLed = BUILTIN_LED_OFF; connectivityLed = BUILTIN_LED_ON; } +void play_from_cloud(void* args) { + // play is a blocking function, so run this on the events thread instead of the main thread + // (otherwise the device is not accessible while playing) + client.eventQueue()->call(&play, args); +} + int main() { - // Run a separate Thread to process events in - rtos::Thread et; - et.start(callback(&eventQueue, &EventQueue::dispatch_forever)); + // SimpleClient gives us an event queue which we can use, running on a separate thread (see https://docs.mbed.com/docs/mbed-os-handbook/en/5.1/concepts/events/) + EventQueue* eventQueue = client.eventQueue(); // Handle interrupts on the eventQueue - so we don't do things in interrupt context - btn.fall(eventQueue.event(&fall)); + btn.fall(eventQueue->event(&fall)); // Toggle the built-in LED every second (until we're connected, see `registered` function) - connectivityTicker.attach(eventQueue.event(toggleConnectivityLed), 1.0f); - - // Keep alive ticker (every 25 seconds) - eventQueue.call_every(25000, callback(&client, &SimpleMbedClient::keep_alive)); + connectivityTicker.attach(eventQueue->event(&toggleConnectivityLed), 1.0f); // Functions can be executed through mbed Device Connector via POST calls - client.define_function("led/0/play", &play); + client.define_function("led/0/play", &play_from_cloud); // Connect to the internet (see mbed_app.json for the connectivity method) NetworkInterface* network = easy_connect(true); @@ -78,16 +87,11 @@ } // Connect to mbed Device Connector - struct MbedClientOptions opts = client.get_default_options(); - opts.ServerAddress = MBED_SERVER_ADDRESS; - + struct MbedClientOptions opts = client.get_default_options(); // opts contains information like the DeviceType bool setup = client.setup(opts, network); if (!setup) { printf("Client setup failed\n"); return 1; } - client.on_registered(®istered); - - while (1) {} }